Usage:
August 12, 2005
(Revised August 2005)
U-272
A-197
D-210
O-224
Priority |
PRODUCT IMPROVEMENT PROGRAM FOR INSTALLING THE SPEED ADJUST POTENTIOMETER ON CERTAIN 3456 GENERATOR SETS |
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7751 |
PI30845
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NOTE: The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.
NOTE: This Revised Service Letter replaces the August 12, 2005 Service Letter. Changes have been made to the Distribution of the letter.
COMPLETION DATE |
TERMINATION DATE |
February 28, 2006 | August 31, 2006 |
PROBLEM
The speed adjust potentiometer may be missing on certain Griffin packaged 3456 common design generator sets resulting in the generator set failing to start after the cranking cycle or the generator set running at the incorrect speed.AFFECTED PRODUCT
Model | Identification Number |
3456 | C3G128-129,
131, 137, 150-153, 157, 159-163, 170, 178-181, 183, 191
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PARTS NEEDED
Qty |
Part Number | Description |
1 | 7E1246 | POTENTIOMETER |
1 | KNOB | |
1 | 7C4550 | SEAL-ROTARY SHAFT |
ACTION REQUIRED
See the attached Rework Procedure.OWNER NOTIFICATION
U.S. and Canadian owners will receive the attached Owner Notification.SERVICE CLAIM ALLOWANCES
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NOTE: U.S. and Canadian Dealers Only - Eligible dealers may enter a Type 2 SIMS Report |
PARTS DISPOSITION
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.
Attach. (1-Owner Notification)
(2-Rework Procedure)
COPY OF OWNER NOTIFICATION FOR U.S. AND CANADIAN OWNERS
XYZ Corporation3240 Arrow Drive
Anywhere, YZ 99999
PRIORITY - PRODUCT IMPROVEMENT PROGRAM FOR INSTALLING THE SPEED ADJUST POTENTIOMETER
MODELS INVOLVED - CERTAIN 3456 GENERATOR SETS
Dear Caterpillar Product Owner:
A new Speed Adjust Potentiometer needs to be installed on the products listed below. You will not be charged for the service performed.
Contact your local Caterpillar dealer immediately to schedule this service. The dealer will advise you of the time required to complete this service. Please refer the dealer to their Service Letter dated August 12, 2005 when scheduling this service.
We regret the inconvenience this may cause you and urge you to have this service performed as soon as possible to prevent unscheduled downtime.
Caterpillar Inc.
Identification #(s)
Attached to August 12, 2005 Service Letter
Rework Procedure
Verify the speed adjust potentiometer is missing from the generator set control panel cover. See Illustration 1.
Illustration 1
If the speed adjust potentiometer is missing, install potentiometer part number 7E-1246, seal-rotary shaft part number 7C4550, and knob part number 4W5972 as shown in Illustrations 1 & 2. Attachment wires will be found in the main harness. Wire #44 is red, wire #43 is blue, and wire #42 is yellow. With reference to wiring diagram 234-3202 for EMCPII or wiring diagram 235-0745 for EMCPII+, solder wire #44 (red) to potentiometer terminal 1, solder wire #43 (blue) to potentiometer terminal 2, and solder wire #42 (yellow) to potentiometer terminal 3 as shown in Illustration 2 and Diagram 1.
Illustration 2
Illustration 3
Tools and materials needed: adjustable wrench, hex wrench set, standard jeweler's screwdriver, wire stripper, 100 watt soldering iron, rosin core solder.