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The most complete and versatile line of
metering, blending and hoppering equipment for dry solids.

NOTE:
This Manual contains certain information deemed confidential and proprietary to Acrison and is
provided to the purchaser or user of Acrison equipment with this stipulation. This document must not
be reproduced, copied, loaned, transmitted or otherwise disposed of either directly or indirectly, in
whole or in part, without the expressed written consent of Acrison Inc.
Acrison products are manufactured under the protection of various patents both domestic and foreign.
Copyright 2000—Acrison Inc.— all rights reserved.
TABLE OF CONTENTS
1.0 IMPORTANT SAFETY INSTRUCTIONS....................................................................................................................3
Operator Safet
y
..........................................................................................................................................................3
2.0 INTRODUCTION.........................................................................................................................................................4
About This Manual......................................................................................................................................................4
2.1 Model 105 Series of Volumetric Feeders.............................................................................................................4
2.2 Glossar
y
................................................................................................................................................................6
3.0 INSTALLATION AND OPERATION ...........................................................................................................................8
3.1 Installation.............................................................................................................................................................8
3.2 Feed Output Adjustments.....................................................................................................................................9
3.3 Operational Adjustments ....................................................................................................................................10
4.0 MAINTENANCE— DISASSEMBLY/REASSEMBLY .................................................................................................11
4.1 Meterin
g
Au
g
er ...................................................................................................................................................11
4.2 Dischar
g
e C
y
linder .............................................................................................................................................12
4.3 Intromitter (Conditionin
g
Au
g
er) .........................................................................................................................12
4.4 Conditionin
g
Chamber........................................................................................................................................12
4.5 Seal Housin
g
and Gearbox Assembl
y
—T
y
pe PB .............................................................................................13
4.6 Replacin
g
Seal Packin
g
.....................................................................................................................................15
4.7 Universal Gearbox..............................................................................................................................................16
4.8 Drive Motor and Gear-reducer ...........................................................................................................................17
4.9 Tachometer Assemblies (DC Drives).................................................................................................................17
4.10 Feeders with Quick-Clamp Construction..........................................................................................................20
5.0 SAFETY INTERLOCKS ............................................................................................................................................20
6.0 MAINTENANCE— General .......................................................................................................................................20
6.1 Bearin
g
s..............................................................................................................................................................20
6.2 Gearbox ..............................................................................................................................................................20
6.3 DC Variable Speed Drive...................................................................................................................................21
6.4 AC Variable Speed Drive ...................................................................................................................................21
6.5 Seal Assembl
y
....................................................................................................................................................21
6.6 Cleanin
g
..............................................................................................................................................................21
6.7 General ...............................................................................................................................................................22
7.0 RECOMMENDED SPARE PARTS ..........................................................................................................................22
OUTLINE SCHEMATICS
Basic Feeder Outline— Fi
g
ure 1...............................................................................................................................24
Double Concentric Au
g
er Drive (with T
y
pe PB Gearbox)—Fi
g
ure 2 ......................................................................25
Double Concentric Au
g
er Drive (with Universal Gearbox)— Fi
g
ure 3 .....................................................................26
Double Concentric Au
g
er Drive (used with T
y
pe PB Gearboxes)— Fi
g
ure 4 .........................................................27
Drive Assembl
y
with Options—Fi
g
ure 5 ..................................................................................................................28
Optical Tachometer Assemblies—Fi
g
ure 6 .............................................................................................................29
Ma
g
netic Tachometer Assembl
y
—Fi
g
ure 7.............................................................................................................30
WARRANTY....................................................................................................................................................................31
2

1.0 IMPORTANT SAFETY INSTRUCTIONS
Operator Safety
THIS EQUIPMENT CONTAINS ROTATING COMPONENTS. TO AVOID POSSIBLE BODILY INJURY,
POWER TO THIS EQUIPMENT MUST ALWAYS BE DISCONNECTED BEFORE THE EQUIPMENT IS
OPENED OR PRIOR TO PERFORMING ANY MAINTENANCE WHATSOEVER. DO NOT CLEAN
WHILE OPERATING. NEVER PERMIT AN OPERATOR OR ANY PERSONNEL TO PLACE HANDS,
FEET, APPAREL OR ANY OBJECT INSIDE OR NEAR THE INLET, OUTLET OR ANY FUNCTIONAL
AREA OF THIS MACHINE WHILE POWER IS ON.
This equipment can be installed in a variety of configurations predicated on the overall process design
and/or the physical equipment arrangement. It is the buyer’s or user’s sole responsibility to (1), define the
need for and to subsequently ensure that any safety device(s) or associated safety device(s), other than
that normally furnished by Acrison as standard, is provided in accordance with the specific installation
and operational parameters of the equipment, and (2), define the need for and assure compliance with all
applicable safety laws, rules and regulations.
If safety devices are not specifically included with the original equipment (based on the specifics of a
given installation), Acrison can, at the user’s expressed request only, provide whatever safety device(s)
the buyer or user deems applicable. If Acrison is asked to make such recommendations prior to operation
of the equipment, said recommendations are only advisory and do not impose any obligation or liability
upon Acrison unless Acrison is expressly requested to provide the safety device(s), and does so.
It is the buyer’s or user’s sole responsibility to establish safety procedures and operational instructions to
safeguard the operator(s) during maintenance, cleaning or any use of the equipment whatsoever and to
subsequently ensure that the equipment is operated in conformance with all applicable safety procedures,
laws, regulations and instructions. It is also the buyer’s or user’s sole responsibility to enforce all safety
regulations and operational instructions and to maintain the equipment in a safe condition (guards in
place, warning, caution and/or important labels affixed, electrical boxes secure, interlocks operational,
etc.). In particular, all warning and caution labels must be maintained in a readable condition and, if
necessary, replaced with new labels. These labels are available free of charge on request from Acrison
Incorporated.
Because the nature of the equipment does not always make it possible to prevent operator access to
rotating components, under no circumstances should maintenance or cleaning be performed on the
equipment without first disconnecting all power.
The above WARNING and CAUTION symbols, where displayed within this Manual, are intended to
draw the attention of the user to a potential for risk of personal injury and/or damage to the
equipment if the correct operating procedures are not followed.
IMPORTANT
The equipment is supplied for the specific duty for which it was originally sold and as stipulated on
Acrison’s Equipment Specification and Parts List Documents. It is not recommended to use this
equipment for any other purpose without the expressed written consent of Acrison Incorporated.
WARNING CAUTION
²²
3

2.0 INTRODUCTION
About This Manual
This Manual has been produced as a guide to the correct installation, operation and maintenance of the
Acrison equipment to which it refers. It has been created to provide concise, yet comprehensive product
information to enable the user to obtain long term maximum benefits from the equipment. If there are any
details about this Manual, the equipment or any other activity of Acrison that require further explanation,
please do not hesitate to contact Acrison’s Customer Support.
2.1 Model 105 Series of Volumetric Feeders
Acrison’s Models 105, 105X and 105Z are auger type volumetric feeders, specifically designed for the
accurate and dependable metering of a wide variety of dry solid materials, usually of an amorphous
(powdery) nature.
Metering is accomplished by the feeder’s feed auger which produces a given volumetric output
(volumetric displacement) for each revolution. Normally, the speed of the metering auger is adjustable
over a selected drive turndown ratio, and various size metering augers are available to provide a broad
range of feed output capacities.
Introduced in 1964, Acrison’s highly recognized Model 105 Series of Volumetric Feeders have admirably
survived the brutal test of time, with the unprecedented distinction of ranking highest in worldwide user
preference and recognition. The uniquely versatile and highly viable Double Concentric Auger Metering
Mechanism ensures a constant, uniform and accurate volumetric feed of a countless number of dry solid
ingredients.
MODEL 105 VOLUMETRIC FEEDER
4

As can be seen from the above Illustration, the large “conditioning” auger (or Intromitter) rotates in the
same direction as the smaller “metering auger,” but at a much slower speed. In operation, as these
augers rotate, a constant and uniform density of material surrounding the metering auger is created and
maintained by the “interaction” between the two concentrically mounted augers rotating at dissimilar
speeds. When product flow characteristics so require, a reverse helical section, added to the Intromitter
(or conditioning auger), produces a bi-directional flow pattern to assist in ensuring optimum density
control. And in order to best handle the countless number of dry solid ingredients efficiently and
effectively, Acrison has designed and manufactures a variety of conditioning augers, the selection of
which is determined by the specific handling characteristics of the material being metered. As standard,
the conditioning auger, discharge cylinder, seal components and double auger drive shafts are 304
stainless steel. The metering auger is 316 stainless steel.
In addition, as the conditioning auger rotates, a gentle inward and outward radial action is generated. The
inward radial action “conditions” the material, establishing uniform product density, while simultaneously,
filling the metering auger from a full 360 degrees. The outward action creates agitation within the
feeder’s conditioning chamber totally eliminating any possibility of starving the double augers. This
agitation also transmits upwards to product stored above, with the extent of penetration totally dependent
upon the characteristics of the material being fed. In many instances, a “live” hopper of sorts supplies
product to Model 105 Feeders.
The Model 105 Series of Volumetric Feeders consists of three model sizes…the Model 105, the
Model 105X and the Model 105Z. The Model 105 utilizes a 6 inch diameter Intromitter (or
conditioning auger), the Model 105X is equipped with an 8 inch diameter conditioning auger, and
the Model 105Z is furnished with a 10 inch diameter conditioning auger. Feeder model selection is
determined by the handling characteristics of the product or products to be fed in conjunction
with the required feed rate.
There is a variety of metering auger sizes available for use with the Model 105 Series of Volumetric
Feeders. Please refer to the Capacity Chart within Section 3.3 of this Manual for the feed output
capacities produced by the various size metering augers available with the particular model feeders.
The Model 105Z Feeder, the largest of the Model 105 Feeder Series, is generally recommended for use
with large storage hoppers, bin dischargers of sorts, or those special applications which require the broad
conditioning chamber (product inlet area), and the subsequent versatility afforded by this particular model
feeder. As standard, the various Model 105 Volumetric Feeders are furnished either with flanged
ILLUSTRATION
Metering
Auger
Conditioning/Feed
Chamber
Conditioning
Auger
5

conditioning chambers (onto which various size hoppers or chamber covers can be attached), or with an
integral one cubic foot supply hopper.
The standard variable speed drive for the Model 105 Series of Volumetric Feeders is DC, controlled by
an Acrison variable speed SCR controller. The Model 105 utilizes a 1/2 HP DC motor, the Model 105X is
furnished with a 3/4 HP DC motor, and the Model 105Z with a 1 HP DC motor. The standard DC motor is
totally enclosed.
Acrison offers a number of variable speed SCR/DC controller models for use with the Model 105 Series
of Volumetric Feeders. Depending upon the selected model controller, either a 30:1 or 50:1 drive
turndown ratio is provided, with a number of these controllers available with an assortment of optional
control functions. They are also capable of being furnished in an assortment of enclosures to suit the
specifics of a given application. Please refer to the selected SCR/DC controller Data Specifications for a
detailed description. Specific instructions relating to the variable speed controller are furnished separately.
2.2 Glossary
AC Motor —
An AC Motor is an alternating current motor, available as an optional motor to power the
feeder. AC Motors may be operated at a constant speed, without variable speed control, or may be
furnished with a variable frequency controller for variable speed control. Variable speed AC Motors
generally provide a 10:1 or 15:1 drive turndown ratio.
Conditioning (Feed) Chamber —
The all-steel Conditioning Chamber houses the Double Concentric
Metering Auger Mechanism. The supply hopper of the feeder attaches directly to the top flange of the
Conditioning Chamber. Model 105 Feeder Series Conditioning Chambers are designed without any type
of convergence that could prove detrimental to product flow and/or feed.
DC Motor —
A DC Motor is a direct current motor, selected as the standard drive motor for the Model
105 Series of Feeders because of its wide range variable speed characteristics, and ability to provide
very precise and reliable speed control/regulation. DC Motors can produce either a 30:1 or 50:1 drive
turndown ratio when used in conjunction with Acrison equipment.
Discharge Cylinder —
The Discharge Cylinder is the discharge spout of the feeder, within which the
metering auger rotates, and through which the metering auger discharges product.
Drive Isolation (Magnetic) Clutch —
The Drive Isolation Magnetic Clutch is a device mounted between
the feeder’s drive motor and gear-reducer that, when deactivated via a lockable switch, prevents the drive
motor from powering the feeder’s metering mechanism (typically used as a safety interlock).
Drive Motor —
The Drive Motor is the motor (AC or DC) that powers the feeder.
Gearbox —
The feeder’s Gearbox contains the gearing mechanism that provides the desired ratio of
speed differential between the smaller metering auger and the larger conditioning auger (Intromitter).
Gear-reducer —
The Gear-reducer reduces the motor speed to the desired speed entering the gearbox.
The Gear-reducer is available with one of several ratios, determined by product characteristics and
application parameters, and establishes the maximum speed of the metering auger and thus, its
maximum feed rate output capacity. The feeder’s drive motor flange-attaches to the Gear-reducer, and
the Gear-reducer flange-attaches to the feeder’s gearbox.
Intromitter (Conditioning Auger) —
The various Model 105 Series of Volumetric Feeders include
Acrison’s unique Double Concentric Auger Metering Mechanism, with the larger of the double augers
called the Intromitter (or Conditioning Auger). The Conditioning Auger (or Intromitter) is normally a
helically wound device but can also be provided in other configurations as well, based on the handling
characteristics of the product(s) being handled.
6

The Conditioning Auger produces a bi-directional, opposing sliding movement of product within the
confines of the Double Concentric Augers [produced by the speed differential between the Intromitter
(Conditioning Auger) and the slower rotating metering auger] that gently conditions the material to a very
consistent density while simultaneously, filling the centrally located and smaller metering auger from a full
360 degrees.
Metering Auger —
The Metering Auger is a spiral type conveying device (with or without an integral
center-shaft), centrally situated inside the larger conditioning auger (or Intromitter), that is utilized to
volumetrically displace (meter) product out of the feeder’s conditioning chamber and through the
discharge cylinder. Many sizes and designs are available, the selection of which is determined by the
feed rate and the physical characteristics of the product. Rotation of the Metering Auger, within the
discharge cylinder, produces a specific volume of product discharge for each revolution.
Right Angle Downspout
—
Attached to the end of the feeder’s discharge cylinder, a Right Angle
Downspout provides an easy means for connecting the output of the feeder to auxiliary equipment, also
providing the means for a simple, dust-tight connection.
SCR Controller —
The SCR Controller is the variable speed electronic control system that precisely
regulates (and maintains) the speed of the feeder’s DC motor to the selected speed setting. Normally,
SCR Controllers provide either a 30:1 or 50:1 drive turndown ratio, depending upon the selected
controller model.
Seal Cap —
The Seal Cap exerts pressure upon the seal packing (which is located within the cylindrical
extension of the seal housing) to ensure a positive seal for the rotating drive shaft(s).
Seal Housing —
The Seal Housing assembly attaches to the feeder’s gearbox and to the conditioning
chamber. It provides the housing through which the Double Concentric Auger drive shaft assembly exits
the gearbox and enters the conditioning chamber, and includes the sealing means at the rear of the
conditioning chamber so that product does not escape from (the conditioning chamber) around the
primary (outer) conditioning auger drive shaft.
Seal Packing —
The Seal Packing is the material (usually a synthetic braided material) that produces
the seal for the two independent rotating drive shafts of the feeder. The metering auger drive shaft
rotates within the conditioning auger drive shaft at a different (faster) speed. Packing that seals the
metering auger drive shaft is compressed between the outside of the metering auger drive shaft and the
inside of the conditioning auger drive shaft. Packing to seal the conditioning auger drive shaft is
compressed between the outside of the conditioning auger drive shaft and the inside of the cylindrical
extension of the seal housing.
Supply Hopper —
When supplied, the feeder’s Supply Hopper, integral to the conditioning chamber, or
which attaches to the flange of the conditioning chamber, contains the feeder’s supply of product.
Tachometer —
When included, a digital Tachometer provides very precise speed sensing to assist in
producing the highest possible degree of DC motor speed regulation, linearity and repeatability. Acrison
SCR controllers that provide a 50:1 drive turndown ratio, or those used in conjunction with Acrison weigh
feeders, utilize a Tachometer for speed feedback data. The Tachometer may be directly connected to the
output shaft of the DC motor, through a specially designed gear-reducer, or may be installed between the
motor and gear-reducer.
Torque Limiter Coupling —
An optional device mounted between the feeder’s gear-reducer and
gearbox to provide adjustable overload protection of the drive components.
7

3.0 INSTALLATION AND OPERATION
²WARNING: OBSERVE ALL WARNING AND/OR CAUTION LABELS. Do not ap-
proach any rotating object while the feeder is operating or
connected to a power source.
3.1 Installation
To install and operate, proceed as follows:
1. Open the shipping crate and unbolt the feeder from the skid by removing the four bolts (one in
each corner) which secure it to the skid.
2. Check the feeder for signs of physical damage. If any physical damage is noticed, advise the
shipper and Acrison immediately. Under such circumstances, do not install the equipment.
3. If warning or caution labels are not affixed to the feeder in accordance with the diagram below,
contact Acrison at once.
4. When ready for installation, place the feeder in position on a relatively level surface and secure
the feeder to its mounting using bolts sized to easily fit within the four mounting holes.
5. Connect the feeder/controller to the electrical supply, in accordance with the approved wiring
diagrams.
Model 105 Feeder Series
8

²WARNING: All wiring to the equipment must be made by the user or pur-
chaser. This includes all interconnections between the equipment
and any Acrison supplied control panel(s) as well as any safety
switch(es) and/or safety interlock(s) either required by law and/or
the electrical standards of the user.
6. The feeder is factory lubricated and ready for operation, although lubrication verification is
recommended. Please refer to Section 6.0 (Maintenance), paragraphs 6.1, 6.2, 6.3 and 6.4.
7. Start the feeder and check the metering auger for proper rotation.
CAUTION: When facing the open (discharge) end of the discharge cylinder, direction of
rotation of the metering auger MUST be clockwise (CW). If rotation is not
correct, resultant damage to the feeder may occur. In addition, product
discharge out of the feeder must fall freely and without any restriction
whatsoever.
NOTE:
Operating the feeder in the incorrect direction (especially when filled with product) could
cause the metering auger to detach from the threaded connection to its drive shaft.
Should this occur (on a feeder which is filled with product), most likely, the feeder will
need to be emptied in order to re-attach the metering auger.
Also, if the feeder’s Intromitter (or conditioning auger) is equipped with a threaded
connection (optional), the same situation (as described for the metering auger) can
occur.
8. Fill the feeder’s supply hopper with product.
NOTE:
When in operation, product level in the feeder’s supply hopper should be kept at least 4
inches above the top of the Intromitter (conditioning auger). Below this level, inaccurate
feed may occur.
9. Allow the feeder to operate for approximately one minute to allocate time for the feeder to properly
“condition” the product and to ensure that the metering auger is operating with a complete supply
of material.
10. While the feeder is operating, set the feed output at a given setting and collect a few samples for
a predetermined timed interval. Weigh these samples and adjust the variable speed drive
accordingly to obtain the desired feed rate.
3.2 Feed Output Adjustments
3.2.1 Variable Speed DC Drive
The discharge rate of any particular size metering auger may be adjusted over an infinitely
variable 30:1 or 50:1 drive turndown ratio (depending on the selected model SCR/DC controller)
by adjusting the output speed of the variable speed drive. For complete information, please refer
to the applicable SCR/DC controller instruction manual.
²
9

3.2.2 Variable Speed AC Drive
The discharge rate of any particular size metering auger may be adjusted over an infinitely
variable 10:1 (typical) drive turndown ratio by adjusting the output speed of the variable speed
drive. For complete information, please refer to the applicable variable speed AC controller
instruction manual.
3.3 Operational Adjustments
3.3.1 The speed (ratio) between the smaller metering auger and the Intromitter (or conditioning auger)
is preselected based on the characteristics of the specific material to be metered, factory preset
for optimum performance. If any feed-related problems are encountered, Acrison should be
consulted for assistance.
3.3.2 For feed rates beyond the furnished metering auger capacity, larger or smaller metering
auger/discharge cylinder sets may be available (which are only interchangeable on the individual
models of the 105 Feeder Series). The output capacities of the various size metering augers may
be obtained from the following Capacity Chart.
Size 30:1
Speed Range 50:1 Speed Range
Minimum Output Capacities
MODEL 105 SERIES CAPACITY CHART
(Capacities shown in cubic feet per hour)
Maximum
Output
105-BC 0.00760.0127
105-C 0.0180.03
105-D 0.0480.08
105-G* 0.580.97
105-F 0.280.47
105-E 0.120.2
105-A 0.00120.002
0.38
0.9
2.4
29
14
6
0.06
105-BB 0.01080.018 0.54
105-CC 0.0280.047 1.4
105-DD 0.0840.14 4.2
105-EE 0.1740.29 8.7
105-FF 0.380.63 19
105-GG* 0.841.4
105-N** 4.06.7
105-KK** 2.43.9
105-HH* 1.42.4
42
202
118
72
105-H* 1.021.7 51
105-K** 1.93.2 96
105-M** 3.25.3 160
105-B 0.0030.005 0.15
*Available on the Models 105X and 105Z only.
**Available on the Model 105Z only.
NOTE:
The preceding Capacity Chart indicates the typical output range
for each size metering auger available with Model 105 Series of
Feeders. However, since the physical properties of the actual
product being metered may have an effect upon the exact
output, the stated capacities could vary.
10

4.0 MAINTENANCE—DISASSEMBLY/REASSEMBLY
²WARNING: Be sure to disconnect the feeder from all power sources before
attempting to disassemble. Additionally, if a Drive Isolation (Mag-
netic) Clutch (81) — refer to Figure 4 — is provided to isolate the
Drive Motor (1) from the Gear-reducer (2), be certain that it has
been disengaged (via its local On/Off switch) before beginning dis-
assembly procedures.
IMPORTANT NOTE
The Numerical Component designations contained within this Instruction Manual (and the
following text) are strictly for reference purposes only and do not numerically coincide
with the Part Numbers indicated in the Feeder Parts List from which spare and/or replace-
ment parts should be ordered. Component names, however, are identical.
4.1 Metering Auger (10)
Please refer to Figure 2.
4.1.1 The Metering Auger (10), which contains a left-hand internally threaded hub, is fastened to its
Drive Shaft (11) within the Conditioning Chamber (6).
4.1.2 To remove the Metering Auger (10), rotate CLOCKWISE (when facing the discharge end of the
auger) until it is disengaged.
The Metering Auger (10) may be withdrawn through the Discharge Cylinder (12), or through the
front of the Conditioning Chamber (6).
To reassemble, reverse the preceding procedure.
CAUTION: Care must be taken when removing the Discharge Cylinder (12) if the Metering
Auger (10) has not been removed, particularly, on those feeders equipped with
an extended length metering auger, a solid flight type metering auger, or any
extended length metering auger furnished with an end bearing support. As
long as the Discharge Cylinder (12) is attached to the feeder, the Metering
Auger (10) is adequately supported, even if its end bearing support is loosened
or removed.
However, if the discharge cylinder is removed with the metering auger still
attached, a rigid type metering auger (solid flight type auger or any extended
length metering auger furnished with an end bearing support) can potentially
damage its drive shaft (bend the shaft) if the unsupported auger is allowed to
drop-down (due to its weight). Also, the Metering Auger Drive Shaft (11) can
likewise be damaged if such an auger was physically moved about in a manner
that could cause the threaded end of the drive shaft to bend (where it attaches
to the metering auger).
²
11

If this occurs, most likely, a wobble of the Discharge Cylinder (12) will be
noted and ultimately, the threaded end of the Metering Auger Drive Shaft (11)
will fail (fatigue).
In addition, whenever exchanging or swapping components from one feeder to
another (only possible with feeders of the same model designation), verifica-
tion of proper alignment with respect to the metering auger and its end bearing
support is essential to ensure that damage to the Metering Auger Drive Shaft
(11) does not occur.
If, after reassembly of the Metering Auger (10), alignment appears improper
when installing the metering auger’s end bearing support (the end bearing may
be piloted for exact positioning), Acrison should be consulted for assistance.
4.2 Discharge Cylinder (12)
Please refer to Figures 1 and 2.
4.2.1 The Discharge Cylinder (12) may be removed by unbolting the screws fastening the flange of the
cylinder to the face of the Conditioning Chamber (6). Please note that it is a recommended
practice to first remove the Metering Auger (10) before removing the discharge cylinder, if
possible, to avoid potential damage to either the metering auger and/or its drive shaft (primarily
the drive shaft). See the CAUTION note following Metering Auger, paragraph 4.1.2.
To reassemble, reverse the preceding procedure.
4.3 Intromitter (Conditioning Auger) (8)
Please refer to Figure 2.
4.3.1 With the Discharge Cylinder (12) and Metering Auger (10) removed, the Conditioning Auger (8)
may be disengaged. Loosen and remove the three cap screws which fasten the Conditioning
Auger (8) to its drive shaft flange. The Intromitter (or conditioning auger) may now be withdrawn
through the front of the Conditioning Chamber (6) or through the top (inlet) of the feeder, if
accessible. For feeders furnished with a threaded conditioning auger hub (instead of a flanged
hub), remove the conditioning auger in a manner similar to that of the metering auger. In such
instances, the Intromitter (or conditioning auger) is equipped with a left-hand internally threaded
hub to fasten it to its Drive Shaft (9) within the Conditioning Chamber (6). To remove, rotate
CLOCKWISE (when facing the discharge end of the feeder) until it is disengaged. The
conditioning auger may now be removed through the front of the conditioning chamber or through
the top (inlet) of the feeder, if accessible.
To reassemble, reverse the preceding procedure.
4.4 Conditioning Chamber (6)
Please refer to Figures 1 and 2.
4.4.1 Remove the Discharge Cylinder (12), the Intromitter or Conditioning Auger (8) and the Metering
Auger (10).
Install a temporary chock beneath the front side (feeder side) of the Gearbox (3), between the
gearbox and the Feeder Mounting Base (4), to provide support once the Conditioning Chamber
(6) is removed. Then, unbolt the Conditioning Chamber (6) from the Seal Housing Assembly (5).
Unbolt the Conditioning Chamber (6) from the Feeder Mounting Base (4) and then remove.
12

NOTE:
The Conditioning Chamber (6) with the Seal Housing Assembly (5) and Gearbox (3),
including the Variable Speed Drive (1 and 2), may be removed as an assembly from the
Feeder Mounting Base (4), if so desired.
To reassemble, reverse the preceding procedure.
4.5 Seal Housing and Gearbox Assembly—Type PB (5 and 3)
Please refer to Figures 2 and 4.
4.5.1 The Seal Housing (5) and Gearbox (3) may be separated from the Conditioning Chamber (6) as
an assembly by removing the bolts that fasten the Seal Housing (5) to the rear plate of the
Conditioning Chamber (6).
NOTE 1:
It will be necessary to first remove the Metering Auger (10) and the Intromitter or
Conditioning Auger (8) before the Conditioning Chamber (6) can be separated from the
Seal Housing (5) and Gearbox (3) assembly.
NOTE 2:
The Model 105 Series of Volumetric Feeders include machined gearbox assemblies
which include specially designed (piloted) two bolt flange bearings with Type PB
Gearboxes. In order to maintain the accuracy of this assembly, replacement bearings
must be identical to the original, and therefore, the Serial Number of the feeder must
always be given should replacement parts for the Gearbox (3) be ordered.
NOTE 3:
Feeders furnished with a Torque Limiting Coupling (80) require removal of the torque
limiting coupling before disassembly of the Gearbox (3), as outlined in the preceding, is
possible. The torque limiting coupling is located between the Gearbox (3) and the
attachment flange of Gear-reducer (2) that attaches the gear-reducer to the Gearbox
(3).
4.5.2 Replacing Gears can be accomplished without removing the Gearbox (3) from the feeder
assembly (see Figure 2). First, remove the Metering Auger (10) and the Intromitter or Conditioning
Auger (8). Then, remove the Drive Assembly (1 and 2) by loosening the two set screws on the
hollow-shaft of the Gear-reducer (2)—when applicable—and removing the four mounting bolts
which secure the Gear-reducer (2) onto the Gearbox (3). If the Gearbox (3) must be removed,
remove the bolts fastening the Seal Housing Assembly (5) to the Conditioning Chamber (6) and
the single bolt fastening the Gearbox (3) to the Feeder Base (4).
4.5.3 To remove Gear (22), loosen the two set screws on this gear and the two set screws on the
adjacent Metering Auger Drive Shaft Bearing (37). Loosen the Metering Auger Drive Shaft Seal
Cap (14) and then, pull the Metering Auger Drive Shaft (11) out through the back of the Gearbox
(3), or alternately, into the Conditioning Chamber (6) as far as necessary to permit removal of the
gear (see the two NOTES following paragraph 4.5.6). Only after this has been done can Gear
(25) also be removed.
4.5.4 To remove Gears (23) and/or Gear (24), loosen the two set screws on each adjacent
Countershaft Bearing (31) and the two set screws on each of the gears. Slip Countershaft (28) out
through the back of the Gearbox (3) far enough to remove the gear or gears.
4.5.5 To remove Gear (25), follow the procedure outlined in the preceding paragraph 4.5.3 for
removing Gear (22). Then, loosen the two set screws on Gear (25) and on the adjacent
Conditioning Auger Drive Shaft Bearings (38). Unthread the Conditioning Auger Drive Shaft Seal
Cap (15) and then, pull the Intromitter (or Conditioning Auger) Drive Shaft (9) into the Conditioning
Chamber (6) far enough to allow removal of Gear (25).
13

Reverse this procedure for reassembly. Be certain all set screws are tightened well and that all
keys have been replaced properly. It is suggested to deburr all keys before reassembly to
eliminate any possibility of binding.
4.5.6 To remove the Metering Auger Drive Shaft (11), first remove the Metering Auger (10) and
Gear-reducer (2); please refer to paragraph 4.8. Then, loosen the set screws on Bearing (37) and
on Drive Gear (22). Remove Snap Rings (40)—when applicable. After this has been done, slide
the Metering Auger Drive Shaft (11) forward or backward to remove.
NOTE:
Loosening the Metering Auger Drive Shaft Seal Cap (14) will facilitate disassembly and
reassembly.
To reassemble, reverse the preceding procedure. Verify that the seal Packing (16) has not
been damaged. Replace if necessary.
NOTE:
Certain Model 105 Feeders include Type PB Gearbox (3) assemblies which include a
Metering Auger Drive Shaft (11) with “Snap Ring” retainers (40) on the drive end to
prevent this shaft from moving under abnormal stress. Please note that it is not
necessary to remove the snap rings on the Metering Auger Drive Shaft (11) when
removing this shaft through the rear (drive side) of the gearbox. If the metering auger
drive shaft has been removed, during reassembly, be certain that the first snap ring is
flush against Bearing (37) before tightening the set screws on this bearing.
4.5.7 The Intromitter (or Conditioning Auger) Drive Shaft (9) must be removed as an assembly
with the Metering Auger Drive Shaft (11). First, remove the Metering Auger (10), the
Conditioning Auger (8) and the Discharge Cylinder (12). Then, remove the Motor (1) and
Gear-reducer (2) as an assembly from the Gearbox (3) by loosening the set screws on the
hollow-shaft of Gear-reducer (2)—when applicable— and then, removing the four bolts which
secure the Gear-reducer (2) onto the Gearbox (3). Remove Snap Rings (40)—when
applicable—on the Metering Auger Drive Shaft (11).
After this has been done, loosen the set screws on Gear (22) and on Bearing (37). Then, loosen
the set screws on Gear (25), remove Snap Rings (41)—when applicable— on the Intromitter (or
Conditioning Auger) Drive Shaft (9), and loosen the set screws on Bearings (38). Once this has
been done, the Intromitter (or Conditioning Auger) Drive Shaft (9), with the Metering Auger Drive
Shaft (11) attached, can be pulled into the Conditioning Chamber (6) and removed.
To reassemble, reverse the preceding procedure. When properly positioned, the flange of the
Conditioning Auger Drive Shaft (9) [against which the Conditioning Auger (8) seats] should be
about 3/16 to 1/4 inch away from the Seal Cap (15).
NOTE:
Snap Rings (41) may be included on the Intromitter (or Conditioning Auger) Drive Shaft
(9) to likewise ensure that this shaft does not move under abnormal stress (see Figure
2). When removing the Intromitter (or Conditioning Auger) Drive Shaft (9), the snap
rings on this shaft must first be removed. A snap ring tool is required to remove and
install snap rings.
4.5.8 If the Gearbox (3) must be removed, remove the bolts fastening the Seal Housing (5) to the
Conditioning Chamber (6) and the bolt fastening the Gearbox (3) to the Feeder Mounting Base
(4). Remove the Gearbox (3), Seal Housing (5) and Gear-reducer (2), with or without Motor (1), as
an assembly. Remove the Gear-reducer (2) and Motor (1) from the Gearbox (3), if necessary, as
previously outlined.
4.5.9 To replace any of the bearings within the Type PB Gearbox (3), follow the basic procedures as
outlined in the preceding in order to gain access to the applicable bearing(s). The bearings are
piloted to ensure proper and automatic realignment. Be certain to re-tighten all set screws and to
properly deburr and replace any keys and/or shafts which may have been removed.
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4.6 Replacing Seal Packing (16 and 17)
Please refer to Figures 2 and 4.
4.6.1 To replace Packing (16) for the Metering Auger Drive Shaft (11), first remove the Metering
Auger (10) and then, unthread the Metering Auger Drive Shaft Seal Cap (14). Remove the
packing with a small screwdriver or needle-nose pliers and then, remove Spring (18). Once this
has been done, clean the inside of the hollow Intromitter (or Conditioning Auger) Drive Shaft (9)
and the outside surface of the Metering Auger Drive Shaft (11) where the Packing (16) seals
against the Metering Auger Drive Shaft (11). Carefully examine the Metering Auger Drive Shaft
(11) for wear and/or scoring; replace if worn or scored.
NOTE:
In order to best examine the Metering Auger Drive Shaft (11), the shaft should be
moved forward. Please refer to paragraph 4.5.6.
To reassemble, first re-install the Spring (18) and then, carefully replace the packing, one ring at
a time. Make sure the packing is clean and has not picked-up any dirt in handling. Seat the
individual rings of packing firmly, making certain that the joints of successive rings are staggered
and kept at least 90 degrees apart (see Figure 4 and refer to NOTE 1 following paragraph 4.6.2).
Also, certain seal assemblies include a Synthetic Washer (20) at each end of Spring (18), which
must be installed as illustrated in Figure 4. After the packing has been replaced, install Seal Cap
(14).
4.6.2 To replace Packing (17) for the Intromitter (or Conditioning Auger) Drive Shaft (9), the
Conditioning Auger (8), along with the Metering Auger (10), must first be removed. Then, follow
the disassembly procedures detailed in paragraph 4.5.7 to loosen and pull-back the Intromitter (or
Conditioning Auger) Drive Shaft (9), away from its Seal Cap (15), far enough to allow access to
the Packing (17). After this has been done, unthread the Intromitter (or Conditioning Auger) Drive
Shaft Seal Cap (15) and remove the packing with a small screwdriver or needle-nose pliers;
remove Spring (19). Once this has been completed, clean the inside surface of the Seal Housing
(5) and then, clean the outside surface of the Intromitter (or Conditioning Auger) Drive Shaft (9).
Carefully examine the exterior of the Intromitter (or Conditioning Auger) Drive Shaft (9) for wear
and/or scoring; replace if worn or scored. Also, check the Front and Rear Bushings (42) [internal
to the Intromitter (or Conditioning Auger) Drive Shaft (9)] in which the Metering Auger Drive Shaft
(11) rotates. If these bushings show wear, they must be replaced. [Bushings are worn if the
Metering Auger Drive Shaft (11) has excessive radial movement within the bushings.]
To reassemble, first re-install Spring (19) and then, carefully replace the packing, one ring at a
time. Make sure the packing is clean and has not picked-up any dirt in handling. Seat the
individual rings of packing firmly, making certain that the joints of successive rings are staggered
and kept at least 90 degrees apart (see Figure 4 and refer to NOTE 1 below). Also, certain Seal
Assemblies include a Synthetic Washer (21) at each end of Spring (19), which must be installed
as illustrated in Figure 4. After the packing has been replaced, install Seal Cap (15) and then,
re-position the Intromitter (or Conditioning Auger) Drive Shaft (9) and secure.
NOTE 1:
The ends of each ring of packing are cut at a 45 degree angle. Make certain that when
installed, the packing ends meet as depicted in Detail “A” of Figure 4. Failure to do so
could result in premature seal failure.
NOTE 2:
To remove either the Metering Auger Drive Shaft (11) or the Intromitter (or Conditioning
Auger) Drive Shaft (9) from within Type PB Gearboxes (3), please refer to the Seal
Housing and Gearbox Assembly, paragraphs 4.5.6 and 4.5.7 respectively.
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4.7 Universal Gearbox (3)
Please refer to Figure 3.
Later model Gearboxes (3), those which include the numbers 0607 or 0196 embossed in the gearbox
casting, are entirely metric in design, with the exception of the threads on the Metering Auger Drive Shaft
(11) associated with Gearbox (3). These particular Gearboxes (3) have the numbers 0196 (for the Models
105 and 105X) and 0607 (for the Model 105Z) embossed into their castings.
4.7.1 To remove the Metering Auger Drive Shaft (11) and/or Gear (22), first remove the Motor (1)
and Gear-reducer (2). Remove Snap Rings (40) and Retaining Ring (90) and then, slide the
Metering Auger Drive Shaft Bearing (37) backward and remove from the Gearbox (3). After this
has been done, slide Spacer (S1) and the shaft key from Gear (22) backward and off the
Metering Auger Drive Shaft (11). Then, slide the Metering Auger Drive Shaft (11) forward or
backward to remove, while also removing Gear (22) and Spacer (S1) as the Drive Shaft (11) is
withdrawn.
4.7.2 To remove the Intromitter (or Conditioning Auger) Drive Shaft (9) and/or Gear (25), first
follow the steps outlined in the preceding paragraph 4.7.1 for removal of the Metering Auger Drive
Shaft (11) and Gear (22). Then, remove Snap Ring(s) (41) and slide Gear (25), along with its
shaft key and Spacer (S5), backward and off the Intromitter (or Conditioning Auger) Drive Shaft
(9). Once this has been completed, slide the Intromitter (or Conditioning Auger) Drive Shaft (9)
forward and remove.
4.7.3 To remove Countershaft (28), Gear (23) and/or Gear (24), first remove Motor (1). Then, remove
Snap Ring (39) on the front end (feeder side) of Countershaft (28). Once completed, slide the
Countershaft (28) to the rear (motor side) of the Gearbox (3). Spacer (S3), Gears (23 and 24),
along with their respective shaft keys and Spacer (S2), will release from the Countershaft (28) as
the countershaft is withdrawn.
4.7.4 To reassemble, reverse the preceding procedure.
NOTES:
Gears must be replaced in the same orientation in which they were removed.
Spacers are not interchangeable, except Spacers (S1 and S2) which are identical.
Loosening of the Seal Cap (14) for the Metering Auger Drive Shaft (11) and the Seal
Cap Pressure Plate (91) for the Intromitter (or Conditioning Auger) Drive Shaft (9) will
relieve pressure on these shafts (generated by the packing material) facilitating removal
(and replacement).
Replacing Packing (16)
4.7.5 Remove both the Intromitter (or Conditioning Auger) (8) and Metering Auger (10). Then,
loosen (unthread) the Seal Cap (14) and remove. Remove the Packing (16) with a small
screwdriver or needle-nose pliers and then, remove Spring (18). Once this has been done, clean
the inside of the hollow Intromitter (or Conditioning Auger) Drive Shaft (9) and the outside surface
of the Metering Auger Drive Shaft (11) where the Packing (16) seals against the Metering Auger
Drive Shaft (11). Carefully examine the Metering Auger Drive Shaft (11) for wear and/or scoring;
replace if worn or scored.
NOTE:
In order to best examine the Metering Auger Drive Shaft (11), the shaft may need to be
moved forward. To accomplish this, please follow the procedure outlined in paragraph
4.7.1.
4.7.6 To reassemble, reverse the preceding procedure.
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First, install the Metering Auger Drive Shaft (11) if it was removed (please refer to paragraph
4.7.1). Then, install Spring (18) and carefully replace the packing, one ring at a time. Make sure
the packing is clean and has not picked-up any dirt in handling. Seat the individual rings of
packing firmly, making certain that the joints of successive rings are staggered and kept at least
90 degrees apart (see Figure 4 for reference and NOTE 1 following paragraph 4.6.2). After the
Packing (16) has been replaced, install Seal Cap (14).
Replacing Packing (17)
4.7.7 Remove both the Intromitter (or Conditioning Auger) (8) and the Metering Auger (10). Then,
loosen and remove the two nuts that secure the Seal Cap Pressure Plate (91). Slide the Seal Cap
Pressure Plate (91) and Seal Cap (92) backward to gain access to the Packing (17). Once
completed, remove the Packing (17) with a small screwdriver or needle-nose pliers. Examine the
Intromitter (or Conditioning Auger) Drive Shaft (9) for wear and/or scoring; replace if worn or
scored.
NOTE:
In order to best examine the Intromitter (or Conditioning Auger) Drive Shaft (9), the
shaft may need to be moved forward. To accomplish this, please follow the procedure
outlined in paragraph 4.7.2.
4.7.8 To reassemble, reverse the preceding procedure.
First, install the Intromitter (or Conditioning Auger) Drive Shaft (9) if it was removed (please refer
to paragraph 4.7.2). Then, carefully replace the packing, one ring at a time. Make sure the
packing is clean and has not picked-up any dirt in handling. Seat the individual rings of Packing
(17) firmly, making certain that the joints of successive rings are staggered and kept at least 90
degrees apart (see Figure 4 for reference and NOTE 1 following paragraph 4.6.2). After the
Packing (17) has been replaced, install the Seal Cap (92) and Seal Cap Pressure Plate (91) and
tighten until a small amount of pressure is exerted upon the packing.
NOTE:
This adjustment should again be made after the first several hours of operation to
ensure that a proper seal exists. Adjust as required.
4.8 Drive Motor and Gear-reducer (1 and 2)
Please refer to Figures 2 and 5.
4.8.1 Standard Models 105, 105X and 105Z Feeders are furnished with a hollow-shaft Gear-reducer (2)
drive which is directly flange-attached to the Gearbox (3). The entire Gearbox (3) assembly,
including where the Gear-reducer (2) attaches, is machined for a totally precision package. The
Gear-reducer (2) is secured to the Gearbox (3) with four bolts, and is furnished with a “C” flange
for direct attachment of the Motor (1).
When a Torque Limiter Coupling (80) is furnished, the Gear-reducer (2) is spaced-off the Gearbox
(3) to both allocate the additional area required to accommodate the Torque Limiter Coupling (80)
and also, to provide access for adjustment of the torque limiter coupling. In such instances, the
Metering Auger Drive Shaft (11) is split where the Torque Limiter Coupling (80) is installed. To
obtain full access to the Torque Limiter Coupling (80), the Gear-reducer (2) must be removed.
Instructions relating to the torque limiter coupling are furnished separately with this Manual.
4.9 Tachometer Assemblies (DC Drives)
Please refer to Figures 6 and 7.
17

As an option, all of Acrison’s various model volumetric feeders are available with precision SCR/DC
variable speed drives employing tachometer feedback for precise speed control and regulation. However,
when Acrison volumetric feeders equipped with variable speed DC drives are utilized as the metering
mechanism of an Acrison weigh feeder, the weigh feeder control scheme includes tachometer feedback
as a standard feature.
Two different type digital tachometers are furnished by Acrison…an Optical Tachometer (45) and a
Magnetic (Pulse) Tachometer (110). The Optical Tachometer (45) couples directly to the high speed shaft
extension of the Gear-reducer (2), as shown in Figure 6. The Magnetic Tachometer (110) installs
between the Gear-reducer (2) and its drive Motor (1), as shown in Figure 7.
Optical Tachometer
Please refer to Figure 6.
4.9.1 When an Acrison volumetric feeder is equipped with a variable speed DC drive including a digital
Tachometer (45), a specially designed Gear-reducer (2), equipped with a high speed extension
shaft, is utilized to drive the tachometer. This high speed shaft is basically an extension of the
motor input shaft of the gear-reducer that extends out of the Gear-reducer (2), directly opposite
the DC motor, to drive the tachometer at the same speed as the motor. The appropriate
tachometer housing, dust-tight, water-tight or explosion-proof, attached to the Gear-reducer (2),
encloses the high speed extension shaft and the tachometer to which the gear-reducer’s high
speed shaft couples.
NOTE:
Due to the very small gauge (thickness) of digital tachometer wires, all connections to
the tachometer must be soldered to ensure proper operation.
4.9.2 Figure 6, Assembly “A” illustrates Acrison’s standard tachometer mounting arrangement in a
dust-tight or water-tight enclosure. A stainless steel Spring Coupling (47) has been selected to
connect the Tachometer (45) to the High Speed Extension Shaft (48) of Gear-reducer (2) because
of the negligible amount of radial force such a coupling applies to the shaft of the tachometer, plus
the fact that these particular tachometers only require an extremely small amount of torque to
rotate. The Spring Coupling (47) slips over the flat surfaces machined onto both the High Speed
Extension Shaft (48) of Gear-reducer (2) and the tachometer shaft. Tachometer housings are
normally manufactured of aluminum, and the standard assembly is dust-tight.
To remove the Tachometer (45), first remove the Cover (44) of the Tachometer Housing (43).
[Please note that dust-tight and water-tight tachometer housing covers are bolted-on as shown in
the illustration, Assembly “A.” An Explosion-Proof Tachometer Housing (54), as illustrated in
Assembly “B,” includes a threaded cover.] Once the Tachometer Housing Cover (44) has been
removed, remove the Tachometer Mounting Plate (46) onto which the Tachometer (45) attaches.
The Spring Coupling (47) will simply slide off either the tachometer shaft or the High Speed
Extension Shaft (48) of Gear-reducer (2). The Tachometer (45) is secured onto its Mounting Plate
(46) with several small screws.
To reassemble, reverse the preceding procedure. During reassembly, be certain to properly
align the flats on both ends of the Spring Coupling (47) onto the flats of each shaft to which it
attaches. Tachometer wiring information is included within the instruction manual for the specific
model SCR/DC controller being utilized.
4.9.3 Figure 6, Assembly “B” illustrates an explosion-proof tachometer mounting arrangement. A
stainless steel Spring Coupling (47) is used to connect the High Speed Extension Shaft (48) of
Gear-reducer (2) to the Tachometer (45) through an intermediary Adapter Shaft Assembly (49). A
spring coupling has been selected for use because of the negligible amount of radial force such a
coupling applies to the shaft of the Tachometer (45), plus the fact that these particular
tachometers only require an extremely small amount of torque to rotate. The Spring Coupling (47)
slips over the flat surfaces machined onto both the High Speed Adapter Shaft (53) and the
18

tachometer shaft. The Adapter Shaft Assembly (49) is threaded into the base of the
Explosion-Proof Tachometer Housing (54), and its shaft connects to the Gear-reducer’s High
Speed Extension Shaft (48) with a Jaw Coupling (50). This jaw coupling is enclosed in a steel
Housing (51) which connects the Explosion-Proof Tachometer Housing (54) to the Gear-reducer
(2).
To remove the Tachometer (45), first remove the threaded Tachometer Housing Cover (55) of the
Explosion-Proof Tachometer Housing (54) and then, unbolt the Tachometer Mounting Plate (46),
onto which the Tachometer (45) attaches, by removing the screws which hold the Mounting Plate
(46) onto its four Mounting Studs (52). The Spring Coupling (47) will simply slide off either the
tachometer shaft or the High Speed Adapter Shaft (53). The Tachometer (45) is secured onto
Mounting Plate (46) with several small screws.
To reassemble, reverse the preceding procedure. During reassembly, be certain to properly
align the flats on both ends of the Spring Coupling (47) onto the flats of each shaft to which it
attaches. Tachometer wiring information is included within the instruction manual for the specific
model SCR/DC controller being utilized.
Magnetic Tachometer
Please refer to Figure 7.
4.9.4 When an Acrison feeder is equipped with a variable speed DC drive which includes a Magnetic
Tachometer (110), the tachometer assembly installs between the Gear-reducer (2) and its drive
Motor (1).
The Magnetic Tachometer (110) consists of a machined aluminum ring with a sensor, an integral
conduit box and a sensing gear. For 56C frame motors, a disc spacer is required.
To assemble onto a 56C frame motor, simply slide the disc spacer onto the Motor (1) shaft,
followed by the sensing gear. (Note: The center hub of the gear should face away from the
motor.) The sensing gear includes a keyway to slide over the key on the Motor (1) shaft. The gear
should be positioned to achieve a 0.225" gap from the motor mounting face (see Figure 7).
Tighten the self-locking set screws on the hub of the gear, securing it in position over the shaft
key. Spin the Motor (1) shaft to ensure that the sensing gear does not rub against the spacer or
the aluminum ring. The Motor (1) and Tachometer Assembly (110) can now be attached to the
input flange of the Gear-reducer (2) and secured with the four bolts.
To disassemble, simply reverse the above referenced procedure.
NOTE 1:
Please note that the center of the gear must be in-line with the center of the sensor,
which is located in the aluminum ring, and that the clearance between the teeth of the
gear and the sensor should be 0.007 to 0.010 inches. If these parameters are not
correct, adjust accordingly. Improper line-up and/or sensor adjustment will cause
tachometer malfunction. On later models, this sensor has been factory aligned,
positioned and permanently secured to the aluminum ring; no adjustment is required or
possible.
NOTE 2:
An explosion-proof Magnetic Tachometer (110) is mechanically identical to the standard
dust-tight/water-tight Magnetic Tachometer (110). Electrically, however, its power supply
and all applicable electrical components are provided in an enclosure suitable for the
explosion-proof area classification(s).
19

4.10 Feeders with Quick-Clamp Construction
Model 105 Series Volumetric Feeders which include Quick-Clamp Construction are designed for the rapid
removal and cleaning of all major components without the need for tools. Disassembly and reassembly is
basic and obvious in the utilization of quick-clamps and knurled knobs and therefore, specific instructions
relating to disassembly/reassembly (of the major components) are not provided. All other
design/functional parameters of the equipment, however, are identical. Sanitary feeders include
Quick-Clamp Construction as a standard feature.
5.0 SAFETY INTERLOCKS
Certain feeders may include a safety interlock (or interlocks).
If a single interlock to prohibit mechanical operation is provided, the interlock may be a magnetic clutch
installed between the motor and gear-reducer that powers the feeder’s mechanism. By removing power to
the clutch, accomplished by a lockable switch, the operating mechanism of the feeder will not function,
even if the motor was somehow energized. Please refer to Figure 5.
If a number of individual interlocks are provided, each applicable component of the feeder (typically those
which can be opened and/or removed via quick-clamps or threaded knobs) and which, when opened or
removed exposes the operator to potential danger, includes an interlock switch, any of which disconnects
power to the feeder’s motor driven mechanism. Various types of interlocks are available, the selection of
which is usually determined by application parameters or user preference.
6.0 MAINTENANCE—General
²WARNING: Disconnect the feeder from all power sources prior to performing
any maintenance whatsoever.
Acrison’s Model 105 Series of Volumetric Feeders have been designed to eliminate as much
maintenance as possible; however, the following normal preventative procedures should be observed:
6.1 Bearings
All bearings furnished with grease fittings are factory lubricated but should be periodically inspected and
greased to maintain a slight leakage at the seals. The suggested lubrication schedule is once every six
months when operating twenty-four hours per day. The grease should be of high quality and medium
consistency. Permanently lubricated bearings do not require any lubrication and are designed for a
minimum of five years of operation under normal operating conditions.
6.2 Gearbox (3)
Gear lubrication for the Gearboxes (3) of Model 105 Feeders should be checked at least once every six
months when operating continuously, or at intervals found to be appropriate (based on equipment usage)
to ensure that an adequate coating of grease exists on the gears at all times. Manual lubrication is
accomplished by applying a heavy-duty gear grease (such as Keystone Moly 29 or equivalent) to the
gears with a brush, with volume and frequency determined by periodic inspection. It is important to
maintain adequate grease on the gears to avoid undue wear.
20