WEHMER 108 User manual

WEHMER Dual Wheel Model Trimmer
Model #108 Operator’s Manual and Trimming Guide
Product Overview
The Wehmer #108 series of models trimmers is
designed and manufactured to give the orthodon-
tic laboratory technician the optimum equipment
to create consistently accurate and esthetic study
models. All of these dual wheel model trimmers are
fitted with 12” coarse and fine cutting wheels, a pre-
cision graduated work table, squaring and angula-
tion tools, and a wide selection of options to cus-
tomize your machine to meet your specific needs.
Standard 108 models are fitted with 1/2 HP motors
for excellent trimming performance. 108P models
feature our upgraded 3/4 HP motor to maximize the
potential of diamond abrasive cutting wheels. An ad-
justable water flow system assures efficient flushing
of ground plaster debris from the work area.
Please read this manual carefully before operating
your new trimmer to get the most out of its capabili-
ties and maintain its long life span.
Includes:
Installation Instructions
Component Overview
Model Trimming Guidelines
Parts Diagram and List
Preventive Maintenance
Troubleshooting Tips
Available Accessories
Warranty Information
Loaner Policy
Factory Service
Product Specifications
Motor
108/110 1/2 HP, 110-120 volts, 60 Hz, 7.9A 1725 RPM
108x/220 3/4 HP, 210-230 volts, 50 Hz, 6.5 A 1425 RPM
108P/110 3/4 HP, 110-120 volts, 60 Hz, 11.9A 1725 RPM
108P/220 3/4 HP, 210-230 volts, 50 Hz, 6.5A 1425 RPM
All motors are Split Phase, Thermally Protected, Moisture Resistant
Wheel Size 12” x 3/16” x 1”
Dimensions 21”W x 18”D x 15”H (55 cm W x 46 cm D x 39 cm H)
Shipping Weight 108 66 lbs \ 30kg 108P 73 lbs \ 33.2 kg
This manual describes operating procedures for
the following models:
108
108P
108PFLE

Unpacking Your New Model Trimmer
After you’ve found the envelope with this manual, you should also
find -
A) Your new Wehmer Trimmer face down in its custom packing
material.
B) Aluminum trimming table with graduations.
C) A small cardboard box containing the following accessories:
1. Squaring tool.
2. Angulation tool.
3. Angulation tool locking knobs (2).
4. Trimming table locking knob.
5. Water valve and work light if ordered.
6. Flow regulator attached to the pipe union.
7. Tool Kit.
8. 3’ clear drain hose
Remove all loose packing
materials around the trim-
mer. The trimming table
is in a padded envelope
wrapped in bubble wrap. Do
not throw this away. Leave
the cardboard box with the
accessories in position
and lift the trimmer out of
the box. Get some help if
you’re not accustomed to
lifting 70 lbs. Remove all
tape and protective packing materials from the machine. Pull out
the cardboard box from below the motor and remove all accesso-
ries. Individual instructions are included with the water valve and
work light (if ordered). Install these accessories at this time. Retain
all packing materials for at last one month in the event you must
return the trimmer for any reason.
Installing Your Trimmer in the Work Area
Selecting the Work Area
Placing your trimmer on a flimsy surface can cause vibration and
excessive noise. Choose a solid work surface in an area with ade-
quate counter space that has easy access to the following utilities:
Water Connection
An adequate pressurized water supply source must be provided
for installation of your Wehmer Model Trimmer. An easily acces-
sible on-off water shut-off valve must be provided in the water line
immediately preceding the trimmer. Do not use the flow regulator
#3006 attached to your model trimmer as an ON/OFF valve. It is
recommended the water supply should be routinely turned off when
the machine is not in regular use, regardless of whether the unit is
equipped with the optional electric water valve. Your water source
should be adaptable to a 1/8”NPT fitting and rigid or flexible 1/4”
water line. Water Line Connection Kit #3890 is available from the
Wehmer Corporation. Attach the outlet end of the water supply to
either the flow regulator #3006 or the inlet side of the electric water
valve. Connect the pipe union #3154 to complete the installation.
Drain Connection
Your Wehmer trimmer is fitted with a 3’ section of 3/4” ID drain hose
which should be run to a sink or directly to a plaster trap. Long hori-
zontal runs of the drain hose can negatively impact on the trimmer’s
ability to expel waste and can cause clogging of the drain line. To
protect plumbing systems, it is always recommended to run trim-
mer waste water through a plaster trap (Wehmer #1641, 16406, or
16408 on page 10).
Electric Supply
Check the specification label on your machine located on the mo-
tor and make sure your electric source matches the specs on the
label. Always make your connection to a grounded electrical outlet
with sufficient overload protection and GFI . Never use an extension
cord or power strip; plug this trimmer directly into a wall outlet.
Place your unpacked trimmer on the counter, or on the optional
#1126 Drain Tray. Make sure the location you have chosen gives
the technician sufficient clearance and access to safely operate the
machine. Depending on local regulations , it may be required to
fasten the trimmer to your countertop. Two holes are provide in the
base of the unit through which fastening bolts can be attached.
Make your water and electrical supply connections, and connect
the drain hose to a drainage outlet fitted with a plaster trap. If the
drain hose must travel over a long stretch of countertop, it is ad-
vised to raise the machine to increase drainage potential. Wooden
blocks or the #1126 Drain Tray can be utilized for this purpose.
Test Run
Put on your safety glasses! Eye protection must always be worn
when running any model trimmer.
Before installing the trimming table and tools:
1. Turn on water supply and check for leaks.
2. Turn on the trimmer via the on-off switch on back of motor. Keep
hands, fingers, hair, clothing, and objects away from the grinding
wheels. Do not grind models or plaster until the trimming table and
tools are installed.
3. Make sure that your trimmer is running vibration free and
that water is flowing onto both wheels. There will be some slight
splash-back on the coarse wheel until the trimming table #3170 is
installed.
Installation of Trimming Table and Tools
Refer to parts diagram on page 6 for item identification.
Find the two angulation tool locking knobs #3301 and place
them, with the knurled end toward the countertop, into the slots in
the sill of the trimmer. Take the trimming table #3170 with the slots
and graduations facing you and flip it over. Find the black plastic
trimming table knob #3172 and screw it into the hole in the middle
of the trimming table - just far enough that the threads catch.
Flip the trimming table back so that the numbers are facing up,
and slide it onto the sill of the trimmer. The long, smooth edge of
the trimming table should face the operator. Line up the threaded
part of the trimming table knob with the slot in the middle of the
sill. Push the table in towards the grinding wheels as far as it will
go, and securely tighten the black plastic trimming table knob from
underneath the table.
The Squaring Tool #3130 slides in and out in the grooves in front
of each grinding wheel. It allows you to grind perfectly flat surfaces
on the bottom bases of models.
The Angulation Tool #3140 is the one with a threaded stud, and a
T-square-looking horizontal plate which is adjustable via the small
knurled nut on top of the tool. The stud on the bottom of the tool
pokes through either hole in the trimming
table, and is screwed down and tightened
via the locking knobs suspended from the
sill. This tool can be rotated to an infinite
number of locations along a circular scale
in the table, and can be locked in place for
positively accurate angle grinding of your
study model bases. Tool location is deter-
mined by lining up the notch in the open
end of the angulation tool with the degree
indications marked on the trimming table.
2
New Quick Release Angulation Tool
Now Available! Part # 3140Z / 3301Z

Drain Hose
This is essentially the exhaust pipe for your model trimmer. If this
tube gets clogged and blocked, you’re in trouble. The drain hose
should be placed on the counter to be level or run downhill. Any
uphill runs will discourage proper drainage. Drain hose #3410 pulls
off for cleaning.
Tool Kit
Wehmer provides a complete set of tools for the routine mainte-
nance of your #108 Dual Wheel trimmer. Included in your tool kit
are (a) the spanner wrench for removing the grinding wheels, (b)
three allen wrenches for removing the front housing and performing
other disassembly procedures, (c) long thin brush for cleaning the
spray tube, and (d) angled brush for cleaning the drainage area in
the base of the trimmer.
Operation
DANGER: SEVERE INJURY CAN RESULT FROM PLACING
HANDS OR FINGERS TOO CLOSE TO THE GRINDING WHEELS
WHILE THE MACHINE IS RUNNING!
Safety
The #108 is a precision balanced and calibrated machine which
provides an important and useful tool for the laboratory technician.
Its quiet and smooth operation may hide the fact that this is an ag-
gressive cutting machine that can cause harm to the operator if not
used properly. Keep hands, fingers, hair, articles of clothing, and
any other items that may come into contact or get entangled with
the grinding wheels away from the machine when it is in operation.
Furthermore -
1. Always wear eye protection when operating this machine.
2. Do not grind with dull wheels. Besides putting excess strain on
your fingers, hands, and wrists, the high forces that are required to
cut with a dull wheel can cause wheel failure.
Cutting with dull wheels can also overheat the motor, causing the
thermal protection switch to trip.
3. The only things that should come in contact with the grinding
surfaces are gypsum (plaster and stone) products. Do not use
these wheels to grind metals.
4. Always turn the machine off when not in use.
5. When disassembling the machine for maintenance activities, dis-
connect from water and electric supply sources.
6. Do not attempt to grind materials without the trimming table
locked in place.
7. Do not replace the fine wheel with a coarse wheel. The shaft
and bearing assembly used to support the fine wheel were not de-
signed for the pressures and forces of rough grinding.
8. Do not attempt to lift or move the trimmer while it is running.
Your #108 Wehmer Dual Wheel Model trimmer is now ready for
operation! Here’s a short description of the basic components
before you start
grinding-
Trimming
Table
This is the plat-
form on which
all of your trim-
ming work is
performed. It is precision calibrated to be at 90° to the working
surfaces of the grinding wheels. The table is easily removable for
cleaning, and is marked with degree reference points for a full 240°
at each grinding position. The oversized work area is conducive
to optimum access and utility of the grinding operations. Standard
table #3170 has a mylar laminate for ease of use. A commercial
grade engraved and anodized table #3071 can be ordered as a
replacement.
Trimming Tools
Squaring Tool #3130 - specifically designed for grinding model bas-
es parallel to the occlusal surfaces, as well as grinding of posterior
corners and lateral surfaces. The rubber pad protects the teeth of
the model from breakage.
Angulation Tool #3140 - the T-shaped adjustable tool is used for
precision grinding of the angles of the model base. The Angula-
tion Tool can be locked in position anywhere in the 240° range of
rotation in front of either
wheel.
Water Spray System
Your Wehmer model
trimmer is fitted with a
removable water delivery
system which provides
exactly the right amount
of water to each grinding wheel. Proper flow of water is essential to
removing grinding debris and slurry from the surface of the wheel
as you’re grinding your models. The two major components are
the spray tube and the flow regulator. The spray tube is inside the
front housing of the machine and has 12 holes (10 coarse side,
2 fine side) which deliver water to the wheels. If you start to get
plaster build-up on your wheels, some of these holes are probably
clogged by sediment from your water supply, and they need to be
cleaned (detailed instructions on Page 8). The flow regulator is the
brass fitting in the water supply line on the side of the trimmer. It
has a stem and handle sticking out of the top. This is NOT an on-
off valve. It is device that controls the amount of water that hits the
wheels, and is factory preset. It should only be adjusted if water
flow doesn’t meet the needs of the user.
Electric Water Valve (optional on 108, standard on 108P)
This solenoid device is attached to your water supply line and to
the electrical connections of the drive motor. Whenever the motor
is turned “ON”, the electric water valve automatically turns on the
water flow. When the motor is turned “OFF”, the water flow stops.
It’s a great convenience option for the technician.
Clean-Out Plug
This screw-in plug #3319 is located on the front of the machine, at
the bottom. It is removable by turning counterclockwise so that you
can unclog the drainage cavity in the machine. If cloggage is major,
the front housing may need to be removed to clear the blockage.
When using the model trimmer on drain tray #1126, this plug can
be left out of the hole for increased drainage capacity.
When Changing Wheels:
When Changing Wheels:
1. Check all wheels for cracks or defects before mounting.
2. Do not use wheels which have been dropped or dam-
aged.
3. Make sure that the wheel hole fits properly on the hub.
Excessive side play could indicate a damaged or worn hub
that will create a dangerous operating condition.
4. Do not use excessive pressure when tightening the wheel
in place. Tighten wheel nut only enough to firmly secure
the wheel.
5. Always run the wheel in a protected area for one minute
after installation and before grinding.
6. Do not make grinding contact with a bump or sud-
den impact.
3

Trimming Tips
Before you start trimming, here’s a few guidelines that will help you get the most out of your
trimming procedures -
Always follow the plaster manufacturer’s mix ratio for plaster and water. Consistent, measured mix
ratios minimize shrinkage and maximize material strength.
Always mix your plaster or stone under vacuum, and pour while vibrating to avoid air bubbles.
When pouring your model, make sure that the bottom of the impression tray, the occlusal surface of
the impression, and the bottom of the base former (or “boat”) are all parallel. Otherwise you’ll start off
with the teeth on an angle, and you’ll have to compensate by removing lots of material from the base.
Soak your models in water for 5-10 minutes. This will eliminate the heavy plaster slurry on the model
and trimming table caused by the model absorbing water as you’re trimming.
If using stone wheels, turn on the trimmer and the water flow at least one minute before starting to grind plaster. This will allow the
wheels to get “conditioned” by water flow and grind to their maximum capability.
Let the wheels to do the cutting. Excessive force in pushing the model onto the wheel “squeezes out” the water from between the
model and the abrasive, causing the wheel to clog - further reducing cutting capability. Excessive force also slows down the speed of
the motor, reducing its efficiency and creating premature wear on mechanical components. If you need to really lean on your wheel, it’s
time to replace it.
You’ll achieve your best results and finish by moving the model back and forth across the wheel as you’re grinding, and by using gentle,
but firm pressure.
Trimming Technique
Upper Model
Before beginning to trim, occlude the upper and lower models with the wax bite in place, and check the
relationship of the last molars to each other. If the molars of the lower model extend significantly further
than the molars of the upper model, add the distance of the extension to the 5mm distance in step 3.
Also, if any plaster interferes with the models fully occluding, remove it at this time with a lab knife.
Mark a light pencil line down the midline suture of the model for reference.
Coarse trim the heel of upper model enough to square it to the midline.
Step 1
Occlude the upper model on rubber pad of squaring tool and take a swipe with the
coarse wheel to establish a flat surface on the base parallel to the plane of occlu-
sion. Thickness of the model from base to occlusal surfaces should be about 38 mm
(1 1/2”). If it’s larger, occlude the model to the squaring tool and reduce base to
proper size.
Place the freshly trimmed base on the trimming table and trim the heel of the model
parallel to an imaginary line running between the distal surfaces of the last molars
and perpendicular to your midline pencil mark. Make this cut to within 5 mm (3/16”)
from the last teeth in the arch.
Trim away any excess material around the periphery of the base at this time. Trim to
within 12mm (1/2”) from the buccal surfaces of the teeth.
With the heel of the model against the angulation tool, trim the front of the model
25 degrees to the left and right to meet at the anterior midline, approximately 7mm
from the teeth. Remember, it is important that on all trimming procedures, anatomy
extensions should be equidistant around the entire arch for both models!
Step 5
Step 4
Step 3
Step 2
4

Now, set the angulation tool to 65 degrees and trim the right and left sides of the
model to within 7 mm of the teeth.
Rough-trim excess material around periphery of model, including flattening of the
heel parallel to distal surface of the last molars.
Occlude the lower with the upper model using the wax bite, and trim the bottom of
the lower base to a total thickness of 3” for the two models.
All art work, sculpting, and repairs can now be done prior to soaping and finishing
the completed models.
Lightly touch all trimmed surfaces of both models on the fine wheel until heavy
scratches are removed.
With models still occluded, trim heel corners to 115 degrees.
With wax bite in place, trim backs of model parallel until wheel just makes contact
with the heel of the upper model. If wax protrudes past last molars, trim away with
lab knife before grinding to avoid clogging of the wheel.
Now, set the angulation tool at 55 degrees and trim the right and left hand sides
of the model, maintaining the same amount of anatomy extension as on the upper
model.
Place the heel of the lower model against the unlocked angulation tool and trim a
3-3 cuspid roll to about 7 mm from the anterior teeth.
Lower Model
Step 14
Step 13
Step 12
Step 11
Step 10
Step 9
Step 8
Step 7
Step 6
5

3240
3306
3316
3216
3316
3216
3326
3326
3326
3322
3322
3322
3322
3301
3301
3115
3071
3170 Standard
Commercial
3172
3360 (3)
3130
3140
Complete
3230
3145
3147
3146
3470
3214
3194
3157
3006
3156
3154
3156
3155
3158
3336 110V
3337 220V
3164
3164
3345 110V
3346 220V
3306
3113
3113
3306
3220
3342
3164
3164
3207
3208
3206
3203
3204
3205
3219
Complete
3230Z
NEW Quick Release
3301Z
NEW Quick Release
108 Trimmer Parts
3103 Sleeve Bearing
3113 Screw, 10-32
3115 Drive Screw
3120 Shaft w/ Bearing
3123 Fiber Washer
3124 External Retainer Ring
3130 Squaring Tool
3136 Screw, 4-40 FH
3145 Angulation Square
3146 Angulation Guide Nut
3147 Brass Washer #8
3153 Flow Regulator
3154 Pipe Union
3155 Elbow
3156 Nipple, 3/4”
3156 Nipple, 3/4”
3157 Nipple, 1-1/2”
3158 Spray Tube Screw
3160 Power Cord
3164 Lug Connector
3165 Jumper Wire
3167 Switch Protector
3168 Switch, 110/220v
3170 Trimming Table w/ Knob
3172 Trimming Table Knob
3181 Rubber Washer
3182 Bearing Retainer Plate
3183 Bearing Mount
3184 Washer
3185 Screw
3187 Rubber Strip
3191 Slinger, Left
3192 Slinger. Right
3193 O Ring
3194 O Ring
3203 Allen Wrench, 1/8
3204 Allen Wrench, 5/32
3205 Allen Wrench, 3/16
3206 Long Brush
3207 Angled Brush
3208 Spanner Wrench
3212 Rubber Plug
3213 Rubber Plug
3214 Set Screw, SS
3215 Set Screw
3216 Wheel Nut
3217 Hub, Fine Wheel
3218 Hub, Coarse Wheel
3219 Flow Adjusting Tool
3230 Lower Angulation Lever
3240 Back-up Plate w/screws
3290 Drive Belts (2)
3301 Angulation Tool Locking Knob
3302 Rubber Retainer Seal
3304 Screw
3305 Fine Wheel, Carborundum
3306 Coarse Wheel, Carborundum
3307 Rubber Foot
3311 Belt Housing Plate
3313 Screw, 4-40 PH
3316 Plastic Shim
3318 Drain Nipple
3319 Clean-out Plug
3321 Wing Nut
3322 Housing Screw, Short
3323 Screw
3324 Washer
3326 Housing Screw, Long
3331 Motor, 1/2 HP, 110v
3333 Motor, 3/4 HP, 110/220v
3336 Water Solenoid 110V
3337 Water Solenoid 220V
3342 Lamp Cord
3343 Lamp Socket
3345 Bulb, 110v
3346 Bulb, 220v
3360 Squaring Tool Pads (3)
3410 Drain Hose, 3’
3440 Housing Gasket
3470 Spray Tube w/ Flange
3560 Belt Housing Gasket
Trimmer Parts Kits
3140 Angulation Tool Complete
3230 Angulation Tool - Lower Only
3240 Back-up Plate w/screws
3430 Belt Cover Plate and screws
3420 Cartons & Packaging 108
3410 Drain Hose (3’)
3344 Dressing Stone
3290 Drive Belts/108 (2)
3006 Flow Regulator / Needle Valve
3270 Housing Screws and Nuts
3250 Hub - Fine Wheel
3260 Hub - Coarse Wheel
3162 Power Cord/ 6’ with three-prong plug
3300 Retainer Seals (2)
3120 Shaft and Bearing Assembly / 108
3190 Slinger Kit / R & L with O-ring / 108
3370 Spray Tube Assembly
3130 Squaring Tool
3360 Squaring Tool Pads (3)
6

3333
3161
3165
3160
3167
3168
3103
3307
3307
3307
3307
3319
3321
3321
3321
3323
3324
3323
3324
3323
3324
3323
3324
3323
3324
3183
3321
3440
3560
3410
3318
3290 (2)
3136
3313
3136
3313
3313
3313
3313
3313
3313
3313
3313
3313
3311
3302
3302
3250
3260
3192
3191
3193
3240
3305
3120
3130
3182
3184
3185
3124
3330 Switch Assembly w/ housing
3200 Tool Kit w/ allen wrenches, spanner, and brushes
3071 Trimming Table/ Commercial Grade w/knob
3170 Trimming Table Standard w/knob
3890 Water Line Connection Kit 2’ x .250 ”x .170”
3336 Water Valve/ Electric/ 110V
3337 Water Valve/ Electric/ 220V
3329 Water Valve Wrench (ASCO)
3380 Wheel Nut Kit / (2 w/ shims)
3390 Work Light/ 110V
3400 Work Light/ 220V 7

Changing the
Grinding Wheels
Disassemble and check your car-
borundum grinding wheels every 6
months. If the wheels are clogged
or worn, they can be flipped to
the other side for additional wear.
Once the wheel is noticeably worn,
or warped from absorbing water,
it is not recommended that the wheel is flipped. Checking your
wheels every six months also allows for routine maintenance of
the drainage area, and for removal of chunks of plaster that inter-
fere with efficient drainage.
1. Unplug your machine, turn off the water supply, and disconnect
the plumbing at the machine by unscrewing the pipe union #3154.
2. Remove the work table and all tools. Remove the work light and
safety shield (if installed).
3. Undo the seven (7) housing screws and wing nuts and take off
the front housing/cover.
4. Remove the fine wheel first, using the spanner wrench #3208.
Make sure that threads on each hub are clean of plaster before try-
ing to turn off the wheel nut. Use a wire brush if needed. Place the
pins of the spanner in the holes of the wheel nut, hold the wrench in
place with one hand over the wheel nut, and give the handle of the
wrench a sharp blow with a hammer (counterclockwise to remove).
Also remove the plastic spacer between the nut and the wheel.
5. Remove the fine wheel back-up plate. Both back-up plates are
secured in place with three (3) machine screws size 8-32 x 1/4”.
Once these screws are removed , the back-up plate should pull off
easily. If it does not, apply some penetrating oil around the center
hole, and at the union between the plate and the hub. Pull outward
from the top edge of the plate, rotating 1/8 - 1/4 turn per each pull.
Repeat until plate is free. DO NOT strike the back-up plate with a
hammer, as it may become damaged and not spin smoothly when
the machine is re-assembled.
6. Repeat steps 4 and 5 for the coarse wheel, removing both the
wheel and the back-up plate.
7. Clean both back-up plates on both sides, scraping off any plaster
build-up which could interfere with the balance of the wheel. Also
clean the mating surfaces on the wheel mounting hub.
8. Replace the coarse wheel back-up plate and install the new
coarse wheel.
9. Replace the fine wheel back-up plate and install the new fine
wheel.
10. Check the front/rear housing gasket. If it is not soft and pliable,
or has flattened out, it should be replaced (part #3440). Make sure
the gasket is free from plaster residue, and that the mating surface
of the front housing is also clean. Any bits of dried plaster could
cause leakage after the machine is reassembled.
11. Re-install the front housing and secure with housing screws.
12. Connect water supply connections, plug in your trimmer, and
allow to run for 5 minutes. Check for smooth operation of wheels,
and for any water leaks.
When installing a new fine wheel, it may be necessary to “dress”
the surface of the wheel to remove loose abrasive particles that
can transfer a gray grit to finished plaster models. A silicon carbide
dressing stone #3344 can be purchased if required.
When replacing wheels, consider diamond wheels
from Wehmer available in coarse and fine grit.
Preventive Maintenance
Here’s a few basic guidelines that will keep your trimmer in top
shape. Follow them and you’ll significantly extend the life of your
investment.
1. Let your trimmer run after trimming! - After trimming your last
model, allow the unit to run with the water flow turned on for at least
two minutes. This will flush out plaster residue and keep the inside
of the housings clean.
2. Clean your tools! - When your trimming day is done, remove
and clean your trimming table and tools. Plaster that dries will
cause wear on the threads of the angulation tool and knobs as well
as cause chemical deterioration of the table. Remember to clean
off the sill on which the trimming table rests, as plaster in this area
will effect the squareness of the table to the wheel.
3. Keep the spray tube clean! - Particles in your water supply can
cause clogging of the tiny holes which spray water onto the wheels.
Luckily, the spray tube is removable and can be cleaned. Complete
instructions are on page 9.
4. Don’t trim with dull wheels! - You won’t be able to keep a flat
surface, and the additional pressure needed to trim will put excess
wear and tear on trimmer components (motor, bearings, shaft, etc.).
In an orthodontic office laboratory, silicon carbide wheels should be
flipped at least every 6 months and changed once a year. See
complete instructions on this page. When changing wheels, clean
all drain areas and check for dried plaster on the back of back-up
discs. Plaster residue is the #1 reason wheels run out of balance
and cause vibration.
5. Maintain threads on wheel nuts and hubs! - When changing
wheels on your trimmer, counterclockwise loosens and clockwise
tightens. Use the spanner wrench supplied with your machine to
avoid damage to the wheel nuts. If you’ve lost yours, we sell re-
placements (#3208). Make sure the threads on your hubs are free
of plaster before remounting the wheel nut. Nuts should thread back
on easily, with only finger pressure. Use the wrench and a hammer
for final tightening only.
6. Keep the housing gasket and mating surfaces clean! - When-
ever you disassemble your trimmer, make sure that no bits of plas-
ter stick to the gasket. Also check the mating surface on the front
housing, cleaning with a wire brush when necessary. When the
gasket begins to leak - replace it (#3340). Thoroughly clean out the
gasket groove with a wire brush prior to installing the new rubber
seal.
7. Keep an eye on the water level in the housing! (Wheels slosh-
ing in water) - Excessive water build-up - caused by insufficient
drainage or too much water flow - can cause all sorts of problems
to your trimmer. Drive belts can get wet and stretched, water can
flow by the slingers to the motor and\or bearing assembly, and plas-
ter residue can get on the hubs causing premature wear of the
v-belt grooves. Keep the drain open and flowing. When using a
diamond wheel, the amount of debris generated during grinding is
significantly increased and requires additional water flow to keep
the wheel clean. This extra plaster must be removed from the drain
area to prevent clogging and water backup. A great solution is to
use the Wehmer Drain Tray #1126, and to remove the clean-out
plug, drain hose, and drain hose nipple - allowing free flow directly
into the tray from two openings.
8. Lubricate the Fine Wheel Bearing! - On the back of the ma-
chine, directly behind the fine wheel, is a round tapered section
of the trimmer housing with a hole in it. This is an oil hole, and
you should lubricate the bearing that is beneath this hole every six
months with a few drops of SAE 10 weight , or another light weight
lubricating oil.
8

Spray Tube Removal and Cleaning
The spray tube is an important part of your trimming system. Uni-
form water flow makes trimming easier by creating a liquid layer
between the model and the wheel. Proper water flow assures flush-
ing of plaster debris and minimizes the potential for clogging of the
drain. If plaster begins to build up on wheel surfaces, it indicates
that the spray tube requires maintenance.
1. Unplug your trimmer from the electric supply source.
2. Shut off the incoming water supply line and disconnect at the
pipe union #3154 (large nut in water supply/ spray tube assembly).
3. Remove trimming table, tools, and tool locking nuts from your
machine.
4. Locate the spray tube assembly (lower left hand side of ma-
chine). At the point of tube entry into the housing, there is a round
flange. At the bottom of this flange is the spray tube locking screw
(Allen Head Cap Screw #3158).
5. Remove this locking screw with a 3/16” Allen wrench.
6. Apply a twisting motion to the spray tube at the 90º elbow to
break free any plaster residue that may be binding the tube inside
the housing. Pull the spray tube out of the housing. If tube cannot
be removed freely, proceed to step 7.
7. Remove front housing by disengaging the seven (7) housing
screws and wing nuts.
8. Remove all plaster in the spray tube cavity by scraping with a
putty knife. If spray tube is still in place, chip away any plaster
which is preventing its removal.
If installing a new spray tube, insert assembly at this point and
reassemble trimmer.
9. After the spray tube assembly is removed, clean the tube por-
tion by lightly sanding with 100 grit sandpaper. This will allow you
to locate the position of all twelve (12) water spray holes (10 for
the coarse wheel, 2 for the fine wheel).
Pay particular attention to the two holes for the fine wheel. The
first hole is 1/2” from the end of the tube and points straight up
(parallel to the wheel). The second hole is 2 1/4” from the end of
the tube and points straight in (perpendicular to the wheel).
10. Remove the Allen Head set screw in the end of the tube with a
1/8” Allen wrench.
11. Clean out all twelve holes by hand with a #65 drill (.035”),
flushing water through the tube while cleaning.
12. Use the long thin brush supplied with your trimmer to clean
inside of spray tube. Continue flushing with water while brushing,
as any particles left in the tube will immediately clog your spray
holes upon re-assembly.
13. Replace the set screw in the end of the tube. Do not over-
tighten - it can cause this tube to crack!
14. Reassemble spray tube to the front housing, and put your
machine back together again.
Before remounting the front housing, check the integrity of the
housing gasket seal. Also, scrape and clean the inside front hous-
ing surface which mates to the gasket seal, making sure that there
is no plaster residue to cause leaks. If you replace the housing
gasket seal, make sure you also clean out the groove in which the
seal seats.
15. Reconnect the water supply and adjust flow regulator so that
both wheels are sufficiently wet, and a backsplash/ misting occurs
on the coarse wheel side as far back as the front housing sill.
Troubleshooting Tips
Here’s a few potentially occurring problems and solutions offered by our service department:
Plaster build-up on the wheel
Lack of sufficient water flow Clean spray tube\adjust flow regulator.
Wheels vibrate
Plaster on back of back-up plate Remove and scrape back-up plate.
Worn wheel center \ Worn hub Install new grinding wheels (#3306/3305) and/or replace hub (#3250/3260).
Back-up disc worn or warped Replace back-up disc (part #3240).
Water build-up in housings (grinding wheels “sloshing”)
Drain Hose clogged Remove drain hose and clean.
Elevate machine 1-2” (can be done with wooden blocks or #1126 Drain Tray).
Blockage in drain cavity Remove clean-out plug and/or front housing. Clean drain cavity.
Excessive water flow Adjust flow regulator.
Insufficient water flow Adjust flow regulator \ Clean spray tube.
Trimmer leaks water
Housing gasket worn Replace housing gasket #3440.
Plaster debris on gasket or mating surface Clean gasket and mating surfaces.
Improperly tightened housing screws Retighten housing screws evenly.
Excessive grinding pressure required
Worn Wheels Flip or change wheels.
Motor stops running Check circuit breaker in electrical panel.
Push red reset button on back of motor (thermal protection switch).
Can’t undo wheel nut
Threads on hub blocked with plaster Clean threads with wire brush.
Wheel has swelled from absorbing water Break off wheel and securely hold back-up plate while striking spanner with hammer.
Trimming table not square to wheel
Plaster Build-up under trimming table Remove table and scrape plaster build-up from sill.
Trimming Table has swelled or warped Replace Trimming Table (part #3170).
Locking knobs keep stripping
Knobs are improperly installed Remove Trimming Table and install knobs in slots between table and sill.
Fine wheel stops or slows Drive Belts are worn or stretched. Replace Drive Belts ( part # 3290).
9

Natural Diamond Abrasive
w/ Epoxy-Glass backing.
3/16” thickness.
12” Coarse
12” Fine
1150
1156
The most significant upgrade you can make to your model trimmer!
Natural Diamond Abrasive
w/ powder coated steel back-
ing. 3/16” thickness.
12” Coarse
12” Fine
10” Coarse
1154
1155
1152
WEHMER Diamond Trimming Wheels
Perfect for the high-volume professional lab.
Thicker than our standard table, this item is
precision CNC-machined and hard anodized
for a long service life. Shipped with mounting
knob. 3071
Commercial-grade Trimming Table
Provides added illumination at the
work area. Turns on and off with
main power switch of trimmer.
Dual 110V 3390
Dual 220V 3400
Work Light
Add an extra shield to the #3500 for full
coverage of both coarse and fine wheels.
Shield w/ clamp 3520
Replacement Shield only 3502
Elevates the dual trimmer less than
2” while significantly enhancing
drainage capability and contain-
ing splash and splatter. Great with
diamond wheels. 1126
Shatterproof polycarbonate keeps de-
bris and water out of your face. Shield
removes easily for cleaning and can
be moved between coarse and fine
wheel. Dual Splash Guard 3500
Splash Guard / Dual
Dual Trimmer Drain Tray Extra Shield
Electric Water Control Water Sprayer
Automatically turns water on and
off with trimmer power switch.
Dual 110V 3336
Dual 220V 3337
Keep your trimming table
and wheels clean with
this convenient sprayer.
Comes with all connec-
tions and flow regulator.
3010
Plaster Traps & Accessories
Aluminum Plaster Trap for
permanent installation. 2.5
GAL capacity w/ replace-
able vinyl liners. Convenient
sight gauge indicates sedi-
ment level. 16410
Vinyl Liners (6) 16411
Gasket 16412
Disposable Traps make clean-up a snap. Slip-fit
flex hoses are leakproof, easy to change, and are
included with each complete kit.
Complete Kit 3 GAL 16406
Replacement Bucket 3 GAL 16407
Complete Kit 5 GAL 16408
Replacement Bucket 5 GAL 16409
Flex Hose Adapters for
Aluminum Trap
Flex Hose to Trap
1-1/2 x 1-1/4 16426
Flex Hose to Plumbing
1-1/4 x 1-1/4 16427
Flex Hose Kit
1-1/4” 16428
Backflow Protector
In-line check valve for all trim-
mers. 1/8” NPT female stainless
steel fitting. 3014
Trimmer Accessories
10

12” Fine
3306
Carborundum Trimming Wheels
Spray Tube
12” Coarse
3305
3370
Belt Cover Plate Kit
3430
Retainer Seals (2)
3300
Housing Gasket
3440 Housing Screw Kit
3270
Slinger Kit
3190
Clean Out Plug
3319
Drain Nipple
3318
Water Line Kit 2’
3890 Drain Hose 3’
3410
3006
Motor 3/4 HP
110/220V - 50/60 Hz
3333
Power Cord
3162
Switch w/ Housing
3330
Work Light Bulb
3345 110V
R & L plus “O” Ring
3346 220V
Squaring Tool
3130
Angulation Tool
Locking Knob
3301 Angulation Tool Complete
3140
3350
3230
Angulation Tool
Lower Only
Angulation Tool
Upper Only
3071
3170 Standard Trimming Table w/ knob
Commercial Trimming Table w/ knob
Trimming Tables & Tools
Electrical Components
Water System
Complete parts diagrams and instructions for installing these replacement parts
are available from Wehmer Customer Service. Just call, fax, or e-mail and we can
provide step-by-step guides for your staff or repair technician. Easy.
800-323-0229 / [e-mail]
www.wehmer.com
Flow Regulator
3172
Trimming Table
Locking Knob
3154
Pipe Union 3155
Spray Tube Elbow
Squaring Tool Pads (3)
3360
3156
Short Nipple
3157
Long Nipple
3240
Back-up Disc
Spanner Wrench
3208
Fine Wheel Hub
3260 3250
Shaft & Bearing
3120
Coarse Wheel Hub
Drive Belts (2)
3290
3216
3316
Wheel Nut
Plastic Shim
Bearing Mount Kit
3180
Now... a quick and easy way to place and remove
your angulation tool. Just tilt the knob and slide onto
the locking stud. Then straighten and tighten with
just one turn. This innovative assembly makes
switching between trimming tools a snap!
ZIGLok
ZIGLok Quick Release
Angulation Tool
ZIGLok Angulation Tool
3140Z ZIGLok Locking Knob 3301Z
Genuine WEHMER Parts
11

Warranty
The Wehmer Dual Wheel Model Trimmer you have purchased is guaranteed to be free from defects in materials and
workmanship for one year from date of purchase. Warranty assumes that this equipment is used within the parameters of
its intended purpose and is not misused, abused, or modified. All warranty claims and adjustments will be made at the
factory by Wehmer factory service technicians unless other arrangements have been made.
Loaner Policy
The Wehmer Service Department maintains a limited stock of loaner equipment which is available to any Wehmer custom-
er for a fee while their machine is being serviced or overhauled at our factory. This fee includes shipping of the loaner to
and from your place of business. Shipping costs associated with the customers’ unit are the responsibility of the customer.
Because we have only a limited number of loaners, we request that you return these machines promptly so that your col-
leagues may also have an opportunity to take advantage of this convenient service.
Wehmer Factory Service
All Wehmer equipment is built in the USA and is backed by an expert team of qualified mechanics who can service, repair
and overhaul your model trimmer. Our service department is equipped with all of the materials, equipment, and expertise
necessary to keep your Wehmer products up to new-machine standards. We maintain a complete stock of spare parts,
and can assist you by answering any questions regarding the care and maintenance of your machine. Call Wehmer Cus-
tomer Service at 1-800-323-0229. Maintenance guidelines for a variety of procedures can also be viewed at our website
-www.wehmer.com.
Returning Your Trimmer to the Factory
Your Wehmer Dual Wheel Model trimmer is a ruggedly built machine, designed to take the wear and tear of high produc-
tion applications for years of reliable use. It is not , however, able to withstand the rigors of travel unless carefully pack-
aged for shipment. If you’ve received a loaner from us, simply use the loaner packaging to return your unit for evaluation
and repair. If you’re not in possession of our loaner, please follow these guidelines:
A) Find a double- or triple-wall carton of sufficient size to allow cushioning material of at least 6” to be placed around the
entire machine, including the ends. The Wehmer Corporation can provide original shipping materials at our cost.
B) Place cushioning material on bottom of box, and position your machine in the middle. Pack cushioning material
around the entire machine so that the trimmer cannot shift inside the box. Foam chips or “peanuts” are not desirable for
your trimmer, as the machine will easily displace this material and shift to the outside edges of the container.
C) Securely tape the package and put your return address on the outside of the carton.
D) Mark package, “Attention: REPAIR DEPARTMENT.” Ship via UPS when possible, and insure for new replacement
value.
E) Ship to:
The WEHMER Corporation
1151 N. Main Street
Lombard, IL 60148 USA
800-323-0229 / p. 630-424-1877/ f. 630-424-1898 / [e-mail]
We appreciate your business!