UNEXPECTED TRANSMISSION SPEED CHANGE MAY OCCUR ON MACHINES EQUIPPED WITH THE FOLLOWING SHIFT LEVERS: 192-6334 CONTROL GP - TRANSMISSION, 201-0213 CONTROL GP - TRANSMISSION Caterpillar

WHEEL-TYPE TRACTORS

COMPACTORS

INTEGRATED TOOL CARRIERS

Problem:

Field reports indicate that an unexpected transmission speed change may occur when either the machine's horn or window wiper switches are operated.

Solution:

Caterpillar Engineering is aware of this problem and a solution to this problem is being investigated. In the meantime, when a transmission control (shift lever) is service replaced by one of the listed part numbers, confirm that the operation of the horn or window wiper switches does not cause the transmission to change speeds. Perform the following procedure:

1.When a new shifter is installed, ensure that the wire from the horn switch is not wrapped around the wires from the shifter. The horn wire must be routed parallel to the shifter wiring.

2.Park the machine on a level surface. Apply the parking brake. Start the engine.

3.Use the "Auto/Manual" switch to select the manual mode.

4.Apply the service brake. Release the parking brake.

5. Place the shift lever in 4F.

6. Operate the horn.

7.Observe the actual transmission gear display. The actual transmission gear display is located on the monitoring system main module.

8.Operate the front window wipers and the rear window wipers simultaneously.

9.Observe the actual transmission gear display. The actual transmission gear display is located on the monitoring system main module.

10.Repeat Step 4 through Step 7 for 3F, 2F, and 1F. Repeat Step 4 through Step 7 for 3R, 2R, and 1R.

11.If the gear display changes while operating either the horn or the window wipers, do not put the machine back into service. Contact a Caterpillar Electronics Machine Analyst at (309) 578-6529 for further assistance.

COPYRIGHT 2001 CATERPILLAR ALL RIGHTS RESERVED