14 - 3
Checking for Faulty Pump or Motor
If the transmission operates or is faulty on one side only then
swop the motor feed hoses to check if the fault is with the
pump or motor. If, after the hose swop, the suspect motor
then operates the fault lies in the relevant pump unit. If the
motor still does not operate then the motor itself is faulty.
Proceed as follows:
1 Stop the engine.
2 Remove the seat and floorplate to expose the pump.
Note: Illustration X shows servo pump up to machine no.
676354. Illustration Y shows servo pump from machine no.
676355. Manual machines are similar to illustration X.
Section E
Hydraulics
9803/8500
Section E
14 - 3
Issue 1
Problem Solving
3 To ensure correct replacement after the test is complete,
mark the motor feed hoses A and B for the right hand
motor, C and D for the left hand motor.
4 Swop the motor feed hoses from one side to the other as
indicated in the illustrations, i.e. swop hoses A and D
then swop hoses B and C.
5 Restart the engine and re-check the operation of left and
right motors. Note that when the left motor is selected the
right motor should now drive and the left motor should
drive when the right motor is selected. If the previously
faulty motor now functions then the fault lies in the
relevant pump unit. If the motor still does not operate
then the motor itself is faulty.
6 Refit the hoses in correct position after the test is
completed.
!!
WARNING
Hydraulic Fluid
Fine jets of hydraulic fluid at high pressure can
penetrate the skin. Do not use your fingers to check
for hydraulic fluid leaks. Do not put your face close
to suspected leaks. Hold a piece of cardboard close
to suspected leaks and then inspect the cardboard
for signs of hydraulic fluid. If hydraulic fluid
penetrates your skin, get medical help immediately.
INT-3-1-10/1
DD
X
Y
BB
DD
AA
BB
CC
CC
AA
S168031B/1
325390
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