MAGUIRE NOVATEC VL Series User manual

Page 1 of 2
Models: VL-5, VL-12, VL-19, VL-38
VLP-5, VLP-12, VLP-19, VLP-38
VACUUM LOADERS
VL and VLP Series
DOCUMENT: VL-VLP IM 19 JUNE 2017
VL-12 Model Pellet
and Regrind
Loader
VLP-38 Model
Powder Loader
VL-5-MM
Machine Mount
Pellet Loader
Mini PLC
Self - Contained
Loader Control
© NOVATEC, Inc. 2017 All Rights Reserved

VL-VLP IM 19 JUNE 2017 © 2017 NOVATEC, Inc. All Rights Reserved Page 2
NOTES:
Please record the following
information, which is specific to
this piece of equipment, in the
space provided. Our Parts/Service
Department will need these
numbers to properly respond to
any of your requests.
Instruction Manual: VL-VLP IM 19 JUNE 2017
Model #:___________________________
Serial #____________________________
DISCLAIMER: NOVATEC, Inc. shall not be liable for
errors contained in this Instruction Manual nor for
misinterpretation of information contained herein.
NOVATEC shall not, in any event, be held liable for any
special, indirect or consequential damages in
connection with performance or use of this information.

VL-VLP IM 19 JUNE 2017 © 2017 NOVATEC, Inc. All Rights Reserved Page 3
Table of Contents
1-PRINCIPLE OF OPERATION ..............................................................................................4
2-UNPACKING AND INSPECTION.........................................................................................4
3-VL SPECIFICATIONS..........................................................................................................5
4-VLP SPECIFICATIONS........................................................................................................7
5-LOADER INSTALLATION...................................................................................................9
5.1 CONTROL INSTALLATION...........................................................................................9
6-OPERATION OVERVIEW..................................................................................................10
7-NO-LOAD ALARM FEATURE............................................................................................10
8-ADJUSTING the LOADER CONTROL...............................................................................10
8.1 TO CHANGE LOADING PARAMETERS.....................................................................11
8.2 PARAMETERS EXPLANATION..................................................................................11
9-USE OF PROPORTIONING VALVES................................................................................13
10.0 INITIAL STARTUP
10.1 CONVEYING NOTES................................................................................................14
11 MAINTENANCE ...............................................................................................................14
11.1- VL Series - FLAT FILTER CLEANING:.....................................................................14
11.2- VLP Series - CARTRIDGE FILTER CLEANING:......................................................16
11.3- VACUUM MOTOR BRUSH REPLACEMENT...........................................................17
11.4- VL-12 through VL-38 and VLP-12 through VLP-38 MOTOR BRUSH
REPLACEMENT................................................................................................................18
11.5- VL-5, VLP-5 MOTOR BRUSH REPLACEMENT ......................................................18
11.6- MOTOR REPLACEMENT.........................................................................................19
10-TROUBLESHOOTING .....................................................................................................20
11.0 WARRANTY NOVATEC, INC. - Effective Date 8 MAY 2017........................................21
12.0 ELECTRICAL DRAWINGS………………………………………………………………… ..23
13.0 VL SERIES LOADERS PARTS LIST………………………………………………………..25
14.0 VLP SERIES POWDER LOADERS PARTS LIST…………………………………………26

VL-VLP IM 19 JUNE 2017 © 2017 NOVATEC, Inc. All Rights Reserved Page 4
1- PRINCIPLE OF OPERATION
NOVATEC vacuum loaders utilize a powerful motor to create a vacuum, which draws
material into a chamber. After the load time setting has expired, the vacuum motor is turned
off and the negative pressure in the chamber is relieved. Material in the chamber then falls
through the bottom, past the flapper while compressed air is pulsed through the filter to
dislodge any contaminants or fines that may have accumulated. This cycle is repeated as
many times as necessary, until the unit is shut off by the rise of the conveyed material in the
area below the loader which trips the level switch, removing the ‘demand’ signal.
Machine mounted units do not have a demand switch actuated by the discharge flapper
valve, but instead utilize a remote sensor for demand. The sensor is attached to an
adjustable bracket that slides along the length of a clear sight tube serving as a Just-in-Time
(JIT) material hopper mounted between the machine throat and loader discharge. The
sensor height on the site tube determines the level of material that triggers a demand for
more material and a new load cycle. The sensor may be either a capacitance style, with
sensitivity adjustment, or a pair of photoelectric sensors, an emitter and a receiver.
The bottom flange is normally supplied undrilled to allow the customer to drill the appropriate
mounting pattern for a particular machine.
2- UNPACKING AND INSPECTION
NOVATEC Vacuum loaders are shipped complete, with all controls for automatic operation.
The only utilities required are a 115 or 220 volt power supply (depending on voltage of
control), and clean, dry compressed air at approximately 80 PSI.
After receipt of the unit, completely inspect it for damage. Although the units are packaged
securely, vibration and mishandling during transit can cause damage.

VL-VLP IM 19 JUNE 2017 © 2017 NOVATEC, Inc. All Rights Reserved Page 5
3- VL SPECIFICATIONS
NOVATEC VL Series vacuum loaders are completely automatic self-cleaning vacuum
loaders designed to convey virgin pellets and regrind materials from storage containers to
drying hoppers or directly to process machines.
Machine Mount Models with a sight glass are available as standards for all VL and VLP
models.
Each unit is shipped complete with all controls for immediate operation, and include a
hardware package. The hardware package includes 15 feet of flexible vacuum hose, hose
clamps and a material pick up lance.
Model VL-5 / VL-5-MM VL-12 / VL-12-MM VL-19 / VL-19-MM VL-38 / VL-38-MM
Characteristic
U.S.
Metric
U.S.
Metric
U.S.
Metric
U.S.
Metric
Volume
1/25 ft
3
1.1 liters
1/3 ft
3
9 liters
1/2 ft
3
14 liters
1.0 ft
3
28 liters
*Resin Capacity
1.5 lb
0.7 Kg
12 lb
6 Kg
19 lb
9 Kg
38 lb
17 Kg
Inlet/Dump Throat OD
1.5/2 in
38/50 mm
1.5/2 in
38/50 mm
2 / 2 in
50/50 mm
2.25/5 in
57/127 mm
**Recommended
Throughput / hr
(Brush Type Motor)
200 lb 91 Kg 400 lb 181 Kg 500 lb 227 Kg 650 lb 295 Kg
**Recommended
Throughput / hr
(Brushless Motor)
N/A N/A 650 lb 295 Kg 1000 lb 454 Kg 1200 lb 544 Kg
Load Time: (seconds) up to 99 up to 99 up to 99 up to 99
Dump Time: (seconds) up to 99 up to 99 up to 99 up to 99
Amps @115V 813 13 13
Compressed Air Usage
.2 CFM (5.66 liters/min)
All Models
* Resin capacity and throughput based on 38 lb/ft3 bulk density. Adding external proportioning valve reduces throughput.
** Recommended throughput/hr based on free flowing virgin pellets through 15’ of flex hose. Exceeding recommended
throughputs may result in shortened brush and filter life however, increased throughputs are possible depending on resin
and equivalent feet calculation. Generally, a central conveying system should be used for higher throughputs.
Maximum conveying distance in addition to 15’ flex hose, can include 30’ of horizontal tubing and 1 elbow. Additional
vertical travel, bends or flex hose will reduce recommended throughput.

VL-VLP IM 19 JUNE 2017 © 2017 NOVATEC, Inc. All Rights Reserved Page 6

VL-VLP IM 19 JUNE 2017 © 2017 NOVATEC, Inc. All Rights Reserved Page 7
4- VLP SPECIFICATIONS
NOVATEC VLP Series vacuum loaders operate in a similar manner to the VL’s, but are
designed to convey free flowing powders.

VL-VLP IM 19 JUNE 2017 © 2017 NOVATEC, Inc. All Rights Reserved Page 8

VL-VLP IM 19 JUNE 2017 © 2017 NOVATEC, Inc. All Rights Reserved Page 9
5- LOADER INSTALLATION
Mount the loader body to the hopper lid, positioning it so that the material inlet is directed
towards the material pick up point. Make sure the dump valve flapper plate has enough
room to freely operate. Secure the loader to the hopper lid with captive bolts or clamps to
ensure a safe installation with no chance of hardware vibrating loose.
On machine mounted units, the bottom flange is usually supplied undrilled to allow a range
of mounting patterns and hardware choices. A gasket is used to provide a tight seal
between the loader base and the machine throat.
Ensure a tight seal when securing the loader to the hopper or machine. This is particularly
important for VLP units that will be conveying powder. The conveying line should be
horizontal and/or vertical, using a 90 degree radius bend for directional changes, and it
should be as direct as possible with no slope. All line connections should be vacuum tight.
Rigid conveying tubing should be properly supported by the installer to provide a safe and
secure installation. Use flexible material handling hose to connect the material pick-up lance
or vacuum take-off box to the conveying line. The flexible hose should be only as long as
needed, since excess hose will reduce loader efficiency.
Connect a clean, dry compressed air supply line to the filter on the accumulator tank. The
minimum requirement for effective filter cleaning is 80 PSI.
CAUTION:
1. DO NOT EXCEED 125 PSI. COMPRESSED AIR.
2. PROPER SUPPORT OF ALL CONVEYING LINES AND A SECURE MOUNTING OF
THE HOPPER LOADER IS NECESSARY FOR A SAFE INSTALLATION.
5.1 CONTROL INSTALLATION
The VL/VLP control box may be
mounted in a location that is convenient
for the operator, making sure that the
control cable will extend to the junction
box on the lid of the hopper loader.
The power and connections cables
should be carefully routed away from
hot components or surfaces and away
from high voltage lines that may
produce undesirable electrical noise.
Connect the control to the power source
as required by the nameplate located
on the side of the loader control box.
CAUTION: FOLLOW ALL
NATIONAL and LOCAL
ELECTRICAL CODES.

VL-VLP IM 19 JUNE 2017 © 2017 NOVATEC, Inc. All Rights Reserved Page 10
No-Load Alarm Horn
Alarm Horn Silencer
6- OPERATION OVERVIEW
Pressing the OFF/ON switch will start the vacuum motor, creating vacuum suction through
the conveying line, to the pick-up wand and the loader will load material into the loader’s
vacuum chamber for an adjustable length of time.
When the load time is completed, the vacuum motor will stop, allowing material in the
vacuum chamber to relax and flow through the dump valve to the hopper or machine below.
Simultaneously, the filter will be cleaned with pulses of compressed air blown down through
the filter media. The dump time and the number of pulses used to clean the filter are
adjustable.
Load and dump/pulse cycles will continue until the drying hopper, surge bin or machine
hopper below the loader is full, at which time loaded material will either hold the dump valve
flapper open or trigger a sensor, placing the system in a holding mode. As material is
consumed by the process and flows from the hopper below the loader, the material level will
fall, the flapper will close or sensor will be uncovered, and the loader will begin to load
automatically again, to keep the hopper full.
NOTE: Once the vacuum motor starts, a loading cycle will continue through the load, dump,
and pulse cycles, even if the dump flapper is held open. The loader control senses a full
condition only after the completion of the dump/pulse cycle.
7- NO-LOAD ALARM FEATURE
The No-Load alarm feature monitors the dump flapper on hopper mounted units, to assure it
opens as it should by material discharging after loading. If the flapper does not open 3
seconds after the dump sequence has started, the no load alarm on the side of the control
will sound. On machine mounted units, the No-Load alarm monitors the photo-eye demand
sensor on the glass base to determine if loaded material interrupts the sensor path.
The alarm horn can be silenced with the silence pushbutton on the side of the control.
8- ADJUSTING the LOADER CONTROL
The VL and VLP series loaders
from NOVATEC employ a
Siemens brand, model LOGO!
Mini-PLC Control for loading functions. The control is
housed in a rugged enclosure and is factory programmed
for functions related to vacuum loading.
NOTE: The user may adjust certain parameters of the
control to fine tune their loader’s
operation, but changing settings
other than those listed can damage control operation.
The control is equipped with a small LCD screen that displays operating and programming
prompts, plus pushbuttons to aid in selecting parameters and making changes. A No-Load
alarm horn is located on the side of the enclosure along with a silence button.
Instructions listed here are repeated on the control face for ease of use.

VL-VLP IM 19 JUNE 2017 © 2017 NOVATEC, Inc. All Rights Reserved Page 11
8.1 TO CHANGE LOADING PARAMETERS
8.2 PARAMETERS EXPLANATION
Motor-on Time (Pmp/LT), measured in seconds, is the amount of time the vacuum motor
will run to load material into the loader’s vacuum chamber. Too little time will result in
insufficient loading and will shorten motor life with too many start/stop cycles. Too much
time will pack the loader full of material, prematurely blinding the filter and possibly clogging
the conveying line. This setting should be adjusted over the course of several normal
loading cycles to ‘just fill’ (but not overfill) the loader’s vacuum chamber. NOTE: VLP series
powder loaders include an extended body to house the cartridge filter(s). Loaded material
should not be allowed to be filled up into this extended hopper area. It is intended only as a
housing for the filter cartridges(s), not a hopper for collecting loaded material.
Dump Alarm Time (Alm/AT), measured in seconds, is the pause time between the
completion of Motor On Time and movement of the discharge flapper. This time setting
drives the No-Load alarm feature by determining if material was actually loaded and
dumped, but prevents false alarms from slow moving material discharge. This setting may
be increased if nuisance alarms occur from slow moving material (IE: fluffy regrind) that is
typically slow to evacuate the loader.
It may be decreased if the No-Load alarm is too slow to respond to your material supply
needs
(IE: frequent shortages of material flow).
Dump Alarm Count (Alm/AC),This number represents how many consecutive “no-load”
alarms will cause the alarm horn to sound.
Dump Time (Pmp/DT), measured in seconds, is the setting for how long the loader will
remain at rest after loading, to allow material to evacuate the loader. This setting may be
increased in case the material is very slow moving and/or to provide an extended OFF period
for the loader (IE: if the loader is used to off-load a granulator).
Blowback Count (BB/Cnt), is the number of blowback pulses that occur following loading
for the compressed air system to clean the filter(s). Compressed is blown down through the
filters in the opposite direction of the vacuum loading air, blasting collected fines and dust
from the filter media and into the loaded material. Typically, more blasts will clean the filters
better and extend the time between manual filter cleaning and provide more efficient loading.
However, compressed air is expensive and too many blasts waste this resource. Also,
blasts that extend beyond the dump sequence may actually be strong enough to create
dusting issues around the loader.

VL-VLP IM 19 JUNE 2017 © 2017 NOVATEC, Inc. All Rights Reserved Page 12
Prop Valve A Time (PValve/PVA) and Prop Valve B Time (PValve/PVB), each measured
in seconds, is the amount of time dedicated to the loading of two materials with the use of an
optional, external Proportioning Valve. The Proportioning Valve is installed on the material
inlet of the VL or VLP loader (see separate instructions, accompanying the valve) and
shuttles internal plungers between allowing A (typically virgin) and B (typically regrind)
materials to be loaded during the course of the Motor-On time. Time setting A counts down
during loading at which time the valve switches to allow the B time setting to take over. A
and B will repeat until the Motor-on time expires.
Short A and B time settings will allow multiple ‘layers’ of virgin and regrind materials to be
loaded for rough ‘mixing’ of the two materials during loading. However, short cycles require
each flow of material to start, then stop, possibly resulting in very little material being
conveyed to the loader. Trial and error settings of Motor-on time and A and B times are
suggested to optimize these settings.
MATERIAL LOAD TIME = FILL TIME – PURGE TIME
Because the functions are identical, the term PURGE time is used for purging systems and
pocket conveying systems for cleaning out the conveying line after loading.
Here it is visually...
Purge or
Pocket Valve
CLOSES to
Material flow
LOAD Time
(purge valve
open)
PURGE Time
(purge valve closed)
Times are set in seconds.
Fill Time
(Vacuum Motor “ON”)
Vacuum Motor
“ON”
Vacuum
Motor “OFF”

VL-VLP IM 19 JUNE 2017 © 2017 NOVATEC, Inc. All Rights Reserved Page 13
Solenoid: Connection to control
and connection to compressed
air supply.
Material #1 inlet,
Preferably
Regrind
Material #2 inlet,
Typically Virgin
Material Outlet, connected
to receiver Inlet
9- USE OF PROPORTIONING VALVES
Proportioning valves are a convenient method for introducing regrind into the process while
vacuum loading of virgin material. The proportioning valve is typically installed onto the
material inlet of the receiver and is connected to the central control system, or an accessory
control specifically designed for proportioning valve operation.
Note that a proportioning valve should never be relied upon for accurate mixing of two
materials, but are only a process convenience for loading a second material (typically
regrind). An ideal use of a proportioning valve is emptying a granulator of reground material,
in quantities known to not exceed the limitations or specifications of the process.
If requirements for the proportioning require more accuracy, consult with your supplier
regarding the use of a blender in lieu of a simple proportioning valve.
10- INITIAL START UP
For optimum loader operation, adjust the load time so that the vacuum chamber is almost
completely full at the end of the load cycle. Do not allow the chamber to overfill. NOTE:
VLP series powder loaders include an extended body to house the cartridge filter(s). Loaded
material should not be allowed to be filled up into this extended hopper area. It is intended
only as a housing for the filter cartridges(s), not a hopper for collecting loaded material.
Adjust the dump time so that it is only 1 to 2 seconds longer than the time necessary to
completely empty the chamber. The number of pulses needed to clean the filter depends
upon the material being conveyed. Clean, virgin pellets require minimum filter cleaning while
very dusty regrind or powder may necessitate a maximum filter cleaning sequence. Adjust
the pulse cycle so the filter(s) remain clean. A mid range setting is suggested as a starting
point.
External Proportioning Valve

VL-VLP IM 19 JUNE 2017 © 2017 NOVATEC, Inc. All Rights Reserved Page 14
Remove
Clamping Ring
Carefully
Remove Motor
Lid
10.1 CONVEYING NOTES
Materials, which contain a large percentage of fines or powder, may require increased filter
cleaning. This can be achieved by the following technique.
A) Set the load time to minimum.
B) Set the dump and pulse time to maximum.
C) Increase the compressed air pressure. CAUTION: DO NOT EXCEED 125 PSI.
11 MAINTENANCE
CAUTION: Disconnect electrical power and compressed air supplies before any type
of loader maintenance.
Typical maintenance for self-contained vacuum loaders consists of two main areas: Filter
cleaning and motor brush replacement.
11.1- VL Series - FLAT FILTER CLEANING:
VL Series loaders are typically used for conveying virgin pellets and/or regrind. The amount
of dust within the conveyed materials will determine the frequency of necessary manual filter
cleaning.
NOTE: Although the blowback system of the VL loaders will extend the operational life of
the filter media, it cannot be relied upon alone. Frequent checks of the filter accompanied by
thorough manual cleanings are required, in addition to cleanings during material changes to
prevent cross contamination.
The filter media may be removed for
inspection and cleaning by unclamping the
ring clamp of the lid, directly below the
motor. If necessary, unplug the control
cable and disconnect the air line.
Carefully remove the motor lid and expose
the flat filter directly below the lid. The filter may now
be removed for inspection and cleaning.
Vacuum cleaning the bottom of the filter is recommended to remove
collected resin debris, dust and fines. If compressed air is used, be sure to
wear goggles and blow from the top (coarse screen side) of the filter down
through the filter media. Never bang the filter against a hard surface to dis-
lodge debris. Distortion of the media or sealing ring can result.
Once clean, thoroughly inspect the filter for severe wear, holes, tears and material abrasion.
Any break in the filter media indicates the need for new filter. Do not attempt to repair the
media. Remember that the filter protects the vacuum motor and holes or any kind of
leakage through the filter can allow material to pass into and through the motor, severely
shortening the motor’s life, possibly creating a fire hazard and sending material dust into the
air around the loader. In addition, examine the sealing ring around the filter media.

VL-VLP IM 19 JUNE 2017 © 2017 NOVATEC, Inc. All Rights Reserved Page 15
This ring provides the vacuum seal between the motor lid, the filter and the loader body.
The ring must be smooth, clean and intact to provide a suitable seal for vacuum sealing.
Replace the filter if the seal is not in perfect shape.
Once cleaning/inspection is complete, the filter may be reinstalled by
placing it on the flat rim of the loader body (cloth DOWN and coarse
screen UP) and placing the motor lid down upon it and centering the filter
between the two. Replace the clamp and tighten. With newly installed
filters, the clamp may need to be adjusted to provide a vacuum-tight and
mechanically firm seal.

VL-VLP IM 19 JUNE 2017 © 2017 NOVATEC, Inc. All Rights Reserved Page 16
Vacuum Cleaning
of filter(s) exterior
is recommended
If compressed air is
used, blow down
through the inside to
the
outside.
VLP Cartridge
Filter
11.2- VLP Series - CARTRIDGE FILTER CLEANING:
VLP Series loaders are typically used for conveying free flowing powder materials. For this
task, they are equipped with higher capacity cartridge filters. The amount of dust within the
conveyed materials will determine the frequency of necessary manual filter cleaning.
NOTE: Although the blowback system of the loader will extend the operational life of the
filter media, it cannot be relied upon alone. Frequent checks of the filter accompanied by
thorough manual cleanings are required, in addition to cleanings during material changes to
prevent cross contamination.
CAUTION: Disconnect electrical power and compressed air supplies before any type of
loader maintenance.
The cartridge filter(s) may be removed for inspection and cleaning by unclamping the ring
clamp of the lid, directly below the motor. If necessary, unplug the control cable and
disconnect the air line. Carefully remove the motor lid and expose the cartridge filter
mounting plate directly below the lid. The cartridge filter mounting plate, with the cartridge
filter(s) installed below it may now be carefully removed for inspection and cleaning.
If only light cleaning of the cartridge filter(s) is required,
the filter(s) may remain installed onto the filter plate and
cleaned in place. However, full removal and thorough
cleaning of each cartridge is highly recommended.
Vacuum clean the outside of the filter(s) to remove collected resin debris,
dust and fines. If compressed air is used, be sure to wear goggles and blow
from the inside of the filter(s) down through and out of
the filter media. Never bang the filter(s) against a hard
surface to dis-lodge debris. Distortion of the media or
sealing ring(s) can result.
Once clean, thoroughly inspect the filter(s) for severe wear, holes, tears and
material abrasion. Any break in the filter media indicates the need for new
filter cartridge. Do not attempt to repair the media. Remember that the filter
protects the vacuum motor and holes or any kind of leakage through the filter can allow
material to pass into and through the motor, severely shortening the motor’s life, possibly
creating a fire hazard and sending material dust into the air around the loader. In addition,
examine the sealing ring around the top of each filter cartridge. This seal provides the
vacuum seal between the cartridge filter and the filter mounting plate and must be fully
intact. Replace the cartridge if this seal is not perfect.
NOTE: Polyester filter cartridges, supplied as standard with all NOVATEC VLP loaders are
washable to extend their life. Use only clean water, sprayed at medium pressure through the
media from the inside out to remove dust and debris. The cartridge must be thoroughly
dried before being put back into service. A commercial drying device may be used, or the
cartridge can be thoroughly drained of water and water droplets and left to dry for no less
than 24 hours.

VL-VLP IM 19 JUNE 2017 © 2017 NOVATEC, Inc. All Rights Reserved Page 17
IMPORTANT: Make sure that
each blow down jet on the lid must
be centered over a cartridge filter
for effective blowback action.
Cartridge Filters (3)
Once each cartridge is cleaned, completely dry and inspected, it may be re-installed onto the
filter mounting plate in the same fashion it was removed. Examine the filter mounting plate
to be sure it is intact and its perimeter seal is smooth and clean since it will form a vacuum
tight seal between the motor lid, the filter mounting plate and the loader body. Replace the
seal if it is not in perfect shape.
Once filter cartridge(s) are mounted to the filter mounting
plate, it may be reinstalled by placing it on the flat rim of
the loader body with the cartridges down inside the
loader body. At this point, it is critical that each
cartridge filter is located directly below a blowback
nozzle that cleans it during the blowback sequence
(this step not required for single cartridge units). By
viewing the motor lid and the blowback nozzles on the
underside of it, the filter plate may be rotated into
proper position prior to placing the motor lid down upon
it and centering the filter between the two. Each blow
down jet on the lid must be centered over a cartridge
filter for effective blowback action. Replace the clamp
and tighten. With newly installed filter plate seals, the clamp may need to be adjusted to
provide a vacuum-tight and mechanically firm seal.
11.3- VACUUM MOTOR BRUSH REPLACEMENT
Brushes should be examined for wear and changed before the brush holder or non-brush
components touch the commutator of the motor. Estimated brush life is approximately 300
running hours under normal operating conditions. See next page for detailed brush
changing instructions. To achieve best performance, new brushes should be seated on the
commutator before full voltage is applied. The motor manufacturer recommends the
following procedure:
After brush change, apply 50% to 70% of rated voltage for thirty minutes to accomplish the
seating. The motor will return to full performance after thirty to forty-five minutes of operating
at full rated voltage. The motor must not be run with the vacuum inlet sealed off.
Direct application of full rated voltage after changing brushes will cause arcing, commutator
pitting, and reduced overall life. However, if reduced voltage is unavailable; connecting two
motors of similar rating in series for thirty minutes will accomplish the proper brush seating.
CAUTION: Disconnect electrical power before any type of loader maintenance.
Removing the vacuum motor from the loader lid is recommended prior to changing brushes.

VL-VLP IM 19 JUNE 2017 © 2017 NOVATEC, Inc. All Rights Reserved Page 18
11.4- VL-12 through VL-38 and VLP-12 through VLP-38 MOTOR BRUSH
REPLACEMENT
1. Remove metal band from mid-section of motor
by unscrewing the sheet metal screw in the
side. Pull the cover back away from the motor,
sliding it gently over the wires that pass through
the grommet opposite the screw. The brushes
are visible inside, towards the base of the
motor.
2. Remove the screws on each side of each brush that hold the
brush retaining clip. A screwdriver may be inserted through the
holes in the top of the motor to aid in this process. Remove the
clip carefully to be sure nothing drops into the motor fan housing
opening towards the middle of the motor.
3. The brush is contained within a plastic holder and is connected to
the electrical lead through a spade lug terminal. Gently pull or pry
the lug off the brush holder taking care to not damage the lead or
the lug.
4. New brush may be installed by reversing the above steps. When
securing the brush in the motor housing with the retainer clip, be
sure the brush is properly nested in the motor frame before
securing the screws.
5. Repeat steps 2 thru 4 for the adjacent brush.
6. Replace the metal band onto the mid-section, while carefully routing the wires through
the grommet. It is notched to fit in only one position. Secure with single screw.
Reinstall cover over motor.
11.5- VL-5, VLP-5 MOTOR BRUSH REPLACEMENT
Remove metal cover from motor.
1. Remove plastic shield from top of motor by
squeezing the top of each spring clip (A) while
prying the cover up away from colored brush
holder (green-120 volts, red-220 volts). Cover
can be worked up and off, one side at a time.
Take care to not break small positioning stubs
and grip tabs (B) on the plastic cover.
2. Remove two black screws that hold down brush
retaining clip. Once removed, brush will be
released, but still connected to the short
electrical lead. Use caution to avoid damaging
the lead.
3. Pry electrical lug out of the brush holder in the direction of the motor
armature, taking care to not separate the wire from the lug.
4. New brush may now be connected to the electrical lead by reversing
this procedure. Push the lug firmly between the brass brush holder
and its plastic housing.
1
2
3
4
A
B
1
2
3
4
5

VL-VLP IM 19 JUNE 2017 © 2017 NOVATEC, Inc. All Rights Reserved Page 19
5. Reinstall new brush into motor housing and replace the retaining clip. Be sure to
properly seat the nub on the bottom of the brush holder into the motor housing
groove.
6. Repeat steps 2 thru 5 for the adjacent brush.
7. Replace the plastic shield on top of the motor by aligning it on top of the motor and
pushing down until the spring clips on each brush snap into place.
8. Reinstall metal cover over motor.
11.6- MOTOR REPLACEMENT
Disconnect all power from the loader system. Disconnect the motor wiring from the junction
box located on the lid of the chamber. Remove the three springs that clamp the motor to the
lid. The motor can now be removed. Check the gasket that seals the vacuum motor to the
lid and renew if necessary. Reverse the above steps to install the vacuum motor. Connect
power and verify that the system is operating correctly.

VL-VLP IM 19 JUNE 2017 © 2017 NOVATEC, Inc. All Rights Reserved Page 20
10- TROUBLESHOOTING
Most loader problems are a result of a dirty filter, air leaks or improper adjustments. These
items should be checked before assuming equipment failure.
Problem Investigate
Motor will not run A, B, C, H, and L
Inadequate or no vacuum D, E, F, G, J
Inadequate or no material flow D, E, F, and G, I, K
Motor runs but proportioning solenoid not operating L
CHECK CONDITIONS SOLUTION
A. Power Supply No voltage or voltage incorrect Check incoming power
supply voltage at outlet
B. Stop/Start Switch No voltage through switch Replace switch
C. Vacuum motor No voltage at motor See A,B, & L
D. Filter Filter dirty Replace filter
(Also see G & J)
E. Air Ducts Obstructed Remove obstruction
F. Leaks in system Air leaking into system Replace gaskets & repair
leaks as necessary
G. Blowback air Increase pressure
pressure incorrect Low pressure (not to exceed 125 psi)
H. Limit switch No voltage through switch Replace switch
I. Load Time Chamber not filling sufficiently Increase load time
Chamber over-filling Decrease load time
J. Pulse rate Insufficient to clean filter Increase rate
K. Dump time Insufficient to allow complete Increase time
emptying of chamber
L. Pulse solenoid Correct voltage at solenoid Replace solenoid