VALVE GP-MAIN CONTROL 1351626 - Caterpillar

Sudden movement of the machine or release of oil under pressure can cause injury to persons on or near the machine.To prevent possible injury, perform the procedure that follows before testing and adjusting the power train.
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Test Procedure
Illustration 1 g01128690
(1) Cover
Remove the six screws that hold cover (1) on the right console. Remove the cover and set the cover aside.
Illustration 2 g01030451
Mark the propel lever on the center of the shaft. This is shown in the above illustration.
Push the lever all the way forward. Slowly pull back the propel lever until the neutral light on the dash illuminates.
Stop and mark the rubber boot with a pen. The mark should be centered with the mark on the control lever shaft.
Pull the lever slowly rearward until the neutral light turns off.
Stop and mark the rubber boot with a pen. The mark should be centered with the mark on the control lever shaft.
Position the lever in the neutral detent position. Verify that the mark on the lever is not near either of the marks on the rubber boot. If adjustment is required, perform the following adjustment procedure.Adjustment Procedure
Illustration 3 g01128691
(2) Detent spring
If adjustment is required, loosen the bolt slightly in order to allow detent spring (2) to slip.
Engage the neutral detent roller into the cam. Position the lever so that the mark on the lever is halfway between the two marks on the rubber boot.
The bolt hole in the frame of the propel lever can be slightly enlarged. The enlarged bolt hole will allow more adjustment of the detent spring.
With the lever in the center position and the detent roller in the detent on the cam, tighten the bolt that holds the spring. Make sure that the roller is centered on the cam. If the detent spring will not allow the handle to be positioned at the exact midpoint between the marks, adjust the spring in order to get the handle as close to the midpoint as possible.
After the adjustment has been made, move the propel lever all the way forward. Make sure that the neutral light goes out. Move the propel lever back into neutral. Make sure that the neutral light comes on when the roller spring is engaged in the detent position. Move the propel lever into full reverse. Make sure that the neutral light goes out. Move the propel lever back to neutral. Make sure that the neutral light comes on when the roller spring is fully engaged in the detent position. Repeat the movement several times.