CRL 2300RP Installation manual


SET UP AND OPERATING INSTRUCTIONS
crlaurence.com ●Toll Free (800) 421 - 6144 ● Fax [phone]
CALL TOLL FREE ANYWHERE IN THE U.S. AND CANADA ● ALL PRODUCTS F.O.B. NEAREST WAREHOUSE
11M0413_10-18-19
CRL SOMACA BELT SANDER
MODELS 2300RP and 2300
for 4" x 106" Sanding Belts

ALUMINUM
2
crlaurence.com ●Toll Free (800) 421 - 6144 ● Fax [phone]
CRL SOMACA BELT SANDER MODELS 2300RP AND 2300 FOR 4" X 106" SANDING BELTS
CALL TOLL FREE ANYWHERE IN THE U.S. AND CANADA ● ALL PRODUCTS F.O.B. NEAREST WAREHOUSE
INTRODUCTION
Your new CRL Belt Sander was developed and improved through the years until it can now be called the
nest piece of equipment available in its price range. The machine incorporates many ne features such
as a direct drive, 1 H.P. motor, a spring tensioned- upper pulley, safety shield, totally sealed ball bearings
eliminating weekly lubrication, and a tig welded steel water tank with a replaceable sacricial anode tted in
the tank bottom for corrosion abatement. Like any good machine, it will give best results if it is properly cared
for. It is not necessary to pamper this equipment, but reasonable maintenance will increase the machine’s life.
We put sealed bearings in our machines because we found that most shops do not take the time to grease
the bearings on a routine basis. However, even sealed bearings do sometimes go bad, and should be
inspected on a weekly basis for noise or rough spots. Scrubbing the machine occasionally will prevent glass
and sludge build-up, and any areas where rust is starting to show should be scraped, primed, and repainted
to get the maximum life out of the machine.
The instructions on the following pages will guide you through the initial setup, maintenance, and replacement
of parts on your machine. Should you run into any problem or procedure you do not understand, please feel
free to call our toll free number [phone], and we will be glad to help you.
UNCRATING THE MACHINE
Remove the shipping cover and inspect for any damage. If you nd any part of your machine has freight
damage, save all shipping material and call the delivering carrier immediately. Tell them you want to le a
damage claim and have them send out an inspector. If everything is okay, completely remove the shipping
crate, including the wooden base.
SETTING UP THE BELT SANDER
1. Position the Sander in it's desired location. The machine should be level and secured to the oor with
anchors fastened through the base plate holes.
ELECTRICAL CONNECTION
2. Place the Sander switch in OFF position, plug in to a 110 volt single phase grounded outlet. Ground plug
is provided for safety, DO NOT ALTER IN ANY WAY. Turn switch to conrm the motor will run. If it does
not run check electrical connections.
DRAIN LINE CONNECTION
At bottom of the sander bucket is a 1/2" NPT coupling connection.
IMPORTANT: READ THIS MANUAL THOROUGHLY BEFORE BEGINNING OPERATION

ALUMINUM
3
crlaurence.com ●Toll Free (800) 421 - 6144 ● Fax [phone]
CRL SOMACA BELT SANDER MODELS 2300RP AND 2300 FOR 4" X 106" SANDING BELTS
CALL TOLL FREE ANYWHERE IN THE U.S. AND CANADA ● ALL PRODUCTS F.O.B. NEAREST WAREHOUSE
CONNECT WATER SOURCE
3. Unplug Sander from electrical outlet. Connect the Sander to
the facilities water supply using copper tubing and a 1/8" NPY
male connection to the 1/8" NPT female connection point at
the electric water valve. (See Photo A). Note "ow direction"
as marked on the valve with an arrow. Turn the water ON and
check for leaks. Position a bucket or pan under the drain pipe
on the machine. Note: If drained directly into a sewer line,
abrasive sand grindings may accumulate and could plug your
drain opening.
WATER FLOW ADJUSTMENT
4. Plug machine to outlet again. Be sure the manual water ow
control valve (located after the electric water valve) has the
handle turned in the direction the water is owing: this is the
OPEN position. Turn power switch ON and the water will begin
to spray. The spray pattern on the Sander is not adjustable. If
the spray pattern decreases or changes, remove and clean the
spray nozzle. The manual water ow control valve (See Photo
A) can be adjusted to reduce the water ow. Do not use more
water than needed to keep the belt just wet enough to reduce
dust particles. Turn the machine OFF.
INSTALL ABRASIVE BELT
5. The Sander is shipped with a 120 grit
abrasive belt installed. If so, proceed to step
6 for checking proper tracking. To install
belts unplug the machine from the outlet.
Pull the handle to open the side door. To
remove or install a belt over the top and
bottom pulley pull down on the black handle
tensioner mechanism. (See Photo B) Be
sure the belt does not become wrapped
over the water nozzle.
Photo B
Photo A

ALUMINUM
4
crlaurence.com ●Toll Free (800) 421 - 6144 ● Fax [phone]
CRL SOMACA BELT SANDER MODELS 2300RP AND 2300 FOR 4" X 106" SANDING BELTS
CALL TOLL FREE ANYWHERE IN THE U.S. AND CANADA ● ALL PRODUCTS F.O.B. NEAREST WAREHOUSE
NOTE: Only silicon carbide grain belts should be used for wet or dry glass grinding. Belts are offered as butt
spliced or overlap sliced. The overlap style belts can only run in one direction as arrow marked in back side
of the belt. For proper rotation, with the belt installed over pulleys, the arrow is pointing UP on the back side
of the belt. (See Photo C)
BELT TRACKING ADJUSTMENT
6. The belt has been installed and aligned at the factory
prior to shipping. Instructions below outline the procedure
to make adjustments as needed.
With Sander unplugged from outlet. Rotate the belt by hand
through several cycles to monitor and adjust the tracking
mechanism. On left top side of Sander is the tensioner
assembly, the star shaped knob (Photo B) provides tracking
adjustment. Turning clockwise will move belt to the right,
counterclockwise moves left. Turn the knob until the belt
tracks in the middle of both pulleys when pulling by hand.
Now plug in the Sander to outlet and turn switch ON to
check alignment at operational speeds. The goal is to have
the belt track in the middle of both upper and lower pulleys.
The center "roller platen" should also be aligned with the
belt. (See Photo D) To adjust loosen the two set screws on
the roller platen shaft to move in or outboard until centered
on belt width.
PULLEY ALIGNMENT
The pulleys are aligned at the factory with alignment only
required during pulley replacement intervals. To check
alignment place a straight edge at the pulley edge, both
pulleys including roller platen are the same width therefore
should align evenly with a straight edge. (See Photo E).
Photo C
Photo E
Photo D

ALUMINUM
5
crlaurence.com ●Toll Free (800) 421 - 6144 ● Fax [phone]
CRL SOMACA BELT SANDER MODELS 2300RP AND 2300 FOR 4" X 106" SANDING BELTS
CALL TOLL FREE ANYWHERE IN THE U.S. AND CANADA ● ALL PRODUCTS F.O.B. NEAREST WAREHOUSE
Each pulley has three machine screws within
the pulley hub. If the upper or lower pulley is
out of alignment remove the three machine
screws from the pulley in need of alignment.
The three machine screws once removed are
then reinserted into the pulleys three tapped
holes for removal or to separate the pulley
from the hub. The hub by design is tapered
to insure proper centering of the pulley upon
assembly.
Once the pulley is removed use the (non
threaded) pulley holes to re-insert the three
machine screws. The hub can be adjusted
upon the shaft with the screws lose or by
inserting a screw driver in the hubs slot
opening. Once hub and pulley are aligned
tighten screws in a cross pattern. Photo F
BELT TENSION ADJUSTMENT
The tension is preset from the factory and commonly no further adjustment required. Reference Photo
B, a nut at the end of the red spring controls the tension setting of the belt. Tightening the nut (clockwise)
increases belt tension, counter clockwise reduces belt tension. Should operator notice or hear a apping
sound from the belt during operation the belt is loose requiring tightening.
PULLEY WEAR
The upper and lower pulley will have a crown or hump in the mid section as new. With years of usage
the crown becomes worn or at and the belt will no longer track properly. Reference the enclosed part
replacement list for new crown pulleys.
ROLLER PLATEN
The roller platen exterior is made from durable urethane providing years of wear. The platen assembly
consists of a urethane roller, sealed bearings and shaft. Reference the enclosed part replacement list for new
roller platen assembly. To remove loosen the two set screws to pull shaft from collars.

ALUMINUM
6
crlaurence.com ●Toll Free (800) 421 - 6144 ● Fax [phone]
CRL SOMACA BELT SANDER MODELS 2300RP AND 2300 FOR 4" X 106" SANDING BELTS
CALL TOLL FREE ANYWHERE IN THE U.S. AND CANADA ● ALL PRODUCTS F.O.B. NEAREST WAREHOUSE
NOTE: After a year or two of continued machine use, the pulleys will wear and need to be replaced or have a new crown machined
in them. This is usually evident when you cannot get the belt to track and pulley adjustment will not correct the tracking. To check
this, lay a straight edge across the pulley. A new pulley will have a noticeable hump or crown in the middle of it. A worn-out pulley
will be at or even have a valley in its center. If the pulley is worn, a one degree crown should be remachined into the surface or the
pulley should be replaced with a new one.
Precautions:
1. Do not allow hands to come in contact with the belt while it is moving.
2. Be sure safety shield is properly positioned.
3. Do not overload your shop electrical circuits. Be sure wiring is adequate.
4. Be sure your service plug has grounding provisions to be sure the belt sander is grounded at all times.
GENERAL GUIDELINES
USING THE BELT SANDER
The application of the glass and the choice of belt grits are largely a matter of the individual operator’s preference, but the following
procedures are submitted as a guide for general work.
To obtain a round or pencil edge, use a coarse grit belt and lightly bevel the sharp edges left from cutting by running or swiping
glass quickly across the belt. This helps to reduce chipping the glass during succeeding grinding. Draw the glass slowly across the
unsupported area of the belt above the platen, and at the same time tilt the glass up and down until the desired contour is obtained.
Finish the edge on a smoothing belt and then polish if desired.
For a at, seamed edge, use a belt of medium grit and lightly bevel the edges as above. Next, grind the entire edge at by applying
the glass squarely to the platen. Change to a nishing or smoothing grit and go over the at edge again, then seam both sides of the
glass by tilting it about 45° and running it across the belt on the platen.
Rough grinding can be done by using abrasive belts in grit sizes 40, 60, 80, and 120. Belts of 150, 180, 220 and 280 grits are for
smoothing; grits 320 and 400 for satin nishing; 600 grit and cork belts are for extra high polishing.
LUBRICATION
The only bearings on the sander that may require lubrication are the motor bearings. Check to see if there are grease ttings for
applying lubrication.
Time interval: Every six months.
NOTE: Apply grease sparingly as overly greased bearings can create seal failure and eventually cause bearing failure. Type of
grease: CRL Cat. No. WL14 No.2 Lithium Base Grease.
Use CRL Cat. No. 1200 Metal Lube weekly on the front rest roller axles.
HOW TO REMOVE AND REPLACE THE ELECTRIC WATER VALVE
1. IMPORTANT! Unplug the machine power supply.
2. Turn off water supply to the machine and disconnect the water supply line from the valve (see Photo 1 on Page 4).
3. Disconnect the water line from the connection on the machine.
4. Open connection box on the motor and disconnect the solenoid wires from the wire bundles.
5. Unscrew the solenoid assembly from the manual valve.
6. Prep the new solenoid pipe ttings and thread into manual water valve. ENSURE the water inlet is piped to the #1 stamped inlet
on the solenoid body. The #2 stamped port is the outlet and is piped to the manual water valve.
7. Pull the two new solenoid wires thru the electrical connector and into the motor connection box. Connection will be the same as
the removed solenoid valve. Secure with wire nuts and tape with electricians tape.
8. Rewrap the two solenoid wires with the removed spiral wrap.
9. Replace the cover to the motor connection box and reconnect the water supply. Plug in the machine power supply.
10. Turn on water supply. Turn on the machine and check for leaks. Check that there is water spraying from the nozzle.
11. Make sure the nozzle is NOT spraying when the power is shut off, and make a nal check for leaks on all connections.

ALUMINUM
7
crlaurence.com ●Toll Free (800) 421 - 6144 ● Fax [phone]
CRL SOMACA BELT SANDER MODELS 2300RP AND 2300 FOR 4" X 106" SANDING BELTS
CALL TOLL FREE ANYWHERE IN THE U.S. AND CANADA ● ALL PRODUCTS F.O.B. NEAREST WAREHOUSE
Remove and Install Motor
NOTE: This is a straight-forward job that requires a basic knowledge of electrical wiring. If you do not feel condent in your ability to
connect wires, have a qualied electrician change the motor for you.
1. Unplug the machine, turn off the water supply, and remove the sanding belt.
2. Before removing the bottom pulley, measure the distance from the back side of the pulley to the side of the tank Record this
measurement so you can replace the pulley at this same distance. This will help keep the belt alignment to original specs.
3. Remove the three bolts on the pulley hub and reinstall in the three threaded holes. Using a cross torque sequence on the bolts
when tightening, will force the tapered bushing apart, allowing removal of the hub and pulley.
4. Disconnect the wiring from the motor by removing two screws on the connection box cover on the motor.
5. Disconnect Black (L1) and White (L2 or neutral) plus a green ground coming from the power in line.
6. Those are the power wires plus a green ground wire coming from the power line in. Mark which motor connection each one
goes to for rewiring.
7. With the power wires disconnected from the motor, the power cable can be disconnected from the motor.
8. The four bolts holding the motor to the machine can now be loosened.
9. The motor itself weighs about 40 lbs (18 kg). Use a small jack or have a helper hold the motor up while the bolts are loosened.
Slowly pull the motor from the machine.
10. Align the new motor with the bolts. Capacitor should be facing up. Tighten the bolts from inside the tank.
11. Reconnect the power cable and connect the wires to the motor lugs and replace the metal cover. Reconnect the two solenoid
wires. Plug in the power cord and check for motor operation. The motor should turn counterclockwise as viewed from the shaft
end in the tank. Reverse wires #5 and #8 to correct rotation.
12. After motor operation is conrmed. UNPLUG the power cord, apply a small amount of light grease to the motor shaft to prevent
rust, and replace the lower pulley and the sanding belt. Remember to refer to the “pulley to tank” measurement that was made
in step #2. The water supply can now be turned back on.
13. Turn the belt through two complete rotations by hand and check the alignment. Adjust as needed to make the belt track straight
on all three wheels.
Remove and Replace Sanding Belt, Pulleys, and Roller Platen
Always UNPLUG the machine before doing ANY work on it. The sanding belt should be removed before attempting any work on
Pulleys or the Roller Platen.
Sanding Belt
The sanding belts are easy to replace. With the belt door on the right side of the machine open, rmly pull down on the black
tensioner handle.
This will allow the belt to be removed from the top pulley and then from the lower pulley. Belt installation is just as simple. Hold
the belt with one hand, gripping the middle, and loop the bottom of the belt around the lower pulley. Make sure that the belt is not
between the water spray nozzle and the tank side. Slide one side of the belt over the platen roller and pull down on the tensioner
handle. This will allow you to put the top of the belt over the top pulley. Check that the nozzle is not hooked on the belt and pull the
belt through two complete rotations to check the tracking.
Upper and Lower Pulleys
Before removing the lower pulley, measure and record the distance from the back edge of the pulley (closest to the motor) to the
side of the tank.
The Lower Pulley is removed by rst removing the sanding belt and then removing three (3) 7/16" bolts on the hub. Reinstall the
same bolts in the threaded holes by cross tightening the bolts, this will force the tapered bushings from the crown pulley.
Roller Platen
The Roller Platen is made as an assembly with the roller, two sealed bearings, and the shaft. It is best to measure and record
the distance from the inside edge of the roller to the bracket so the new Roller Platen can be placed close to the same position.
To replace the Roller Platen, remove the sanding belt, then loosen two set screws on the Roller Platen bracket and remove the
assembly. Fit the new assembly at the same distance from the bracket as the old Platen, then tighten the two set screws. Replace
the belt, turn on the machine and check that the platen and belt are running true.
ROLLER PLATEN, UPPER PULLEY, SHAFT AND BEARINGS
For ease of maintenance and durability, the Roller Platen and Top Pulley Assemblies are supplied as two assemblies. Replacing the
bearings or shaft alone requires a press and an experienced operator. Because the roller platen, top crowned pulley itself, and the
bearings are some of the few parts of the 2300RP that may need replacement, they are sold as unit assemblies. These assemblies
can be replaced quickly with simple hand tools by following the instructions on Page 3 of this manual.

ALUMINUM
8
crlaurence.com ●Toll Free (800) 421 - 6144 ● Fax [phone]
CRL SOMACA BELT SANDER MODELS 2300RP AND 2300 FOR 4" X 106" SANDING BELTS
CALL TOLL FREE ANYWHERE IN THE U.S. AND CANADA ● ALL PRODUCTS F.O.B. NEAREST WAREHOUSE
GENERAL MAINTENANCE
Motor Bearings, located on top of motor housing have two access tting locations. Use general bearing
grease. Recommended annually to reduce moisture entering within bearings.
TROUBLESHOOTING
PROBLEM LIKE LY CAUSE SOLUTIONS
Will Not Start Power Failure ●Check electrical power source
●Check ON/OFF switch - is water solenoid
opening?
●Check power at the motor
●Check starting capacitor on motor
Water Does Not Flow Check manual valve is open
Electric Solenoid Failure
●Flip power switch ON/OFF while holding hand
over Solenoid. If snap is felt you have a water
restriction and clean nozzle. No snap, check
power or bad solenoid.
Belt Does Not Track Out of adjustment ●Review belt alignment section of manual. If
it still will not align pulleys and/or platen then
replacement is required. Also check belt
direction and belt type overlap.
Vibration or Noise Bad Motor Bearing or require
lubrication
●Check platen and pulley shafts for vibration.
Replace pulley assembly accordingly.
●Check motor with and without belt installed. If
motor vibrates lubricating motor bearings (two
places on top motor housing) or replace motor.

ALUMINUM
9
crlaurence.com ●Toll Free (800) 421 - 6144 ● Fax [phone]
CRL SOMACA BELT SANDER MODELS 2300RP AND 2300 FOR 4" X 106" SANDING BELTS
CALL TOLL FREE ANYWHERE IN THE U.S. AND CANADA ● ALL PRODUCTS F.O.B. NEAREST WAREHOUSE
Description Qty Part #
Abrasive Belts 120 grit 5 belts / box CRL4X106120X
Abrasive Belts 80 grit 5 belts / box CRL4X10680X
Bar Platen Optional Equipment BS4X106-BP106
Flat Platen Optional Equipment BS4X106-FP106
Roller Platen Assembly 1BS4X106-RP106
Pulley / Hub (same low / upper) 1BS4X106-PH206
Motor 1 HP, TEFC, Special 110/230v, 1800 rpm, 50/60Hz 1BS4X106-MS101
Guide Wheels w/ Bolts ( set 5) 1BS4X106 - GW200
Belt Tension Assembly 1BS4X106 - BT300
Water Solenoid Valve 1BS4X106 -SV650
Ball Valve 1/4" NPT 1BS4X106 - BV660
Water Spray Nozzle 1 BS4X106 -SN670
Tubing 3/8" OD Black 30 inches BS4X106 -TB680
Safety Guard Eye Shield 1BS4X106-GS400
Star Knob 1 BS4X106-SK333
Toggle Switch 110v 1 BS4X106-TS110
8 ft 110v cord 1BS4X106-C110
Tank Anode 1BS4X106-A555
Tank Protective Trim 6 ft BS4X106 -T807
Replacement Tank, water bucket 1 BS4X106-T806
Tank drain tting 1BS4X106-D444
REPLACEMENT PARTS

ALUMINUM
10
crlaurence.com ●Toll Free (800) 421 - 6144 ● Fax [phone]
CRL SOMACA BELT SANDER MODELS 2300RP AND 2300 FOR 4" X 106" SANDING BELTS
CALL TOLL FREE ANYWHERE IN THE U.S. AND CANADA ● ALL PRODUCTS F.O.B. NEAREST WAREHOUSE
REPLACEMENT PARTS DIAGRAM FOR THE 2300RP BELT SANDER