Part No. 57.4400.9203 GTH-4016SR • GTH-4018SR
57
March 2010
REV A
Section 4 • Repair Procedures
Hydraulic Pumps
5-1 How to Test and Adjust the
Function Pump
NOTICE
When removing a hose assembly
or fitting, the O-ring on the fitting
and/or hose end must be replaced
and then torqued to specification
during installation. Refer to
paragraph “
Hydraulic Hose and
Fitting Torque Specifications”
into
Specification Section.
1. Insert the 600bar manometer in the TP2 port.
2. Insert the 600bar manometer on the TP3 port.
3. Start the engine.
4. Verify that 2nd gear is inserted.
5. Using the manual accelerator, increase the
engine up to 1100rpm
(see How to Check the
Engine RPM paragraph).
6. Using the brake pedal, keep the machine
stoped.
7. Engage the forward or backward and check
that the manometer, on the port TP3 (0-
600psi), reads a value of 50psi.
8. If not, set the valve under the pump.
9. With the machine at the maximum rpm check
that, in the port TP3, the pressure gauge
reads 450psi.
10. If not, set the valve on the right side of the
pump.
5-2 How to Remove the Boom
Gear Function Pump
1. Closed the valve of the main hydraulic line. It is
behind the cabin steps.
2. Tag the hoses.
3. Remove the hoses screws.
4. Remove the hoses.
WARNING
Bodily injury hazard. Spraying
hydraulic oil can penetrate and
burn skin. Loosen hydraulic
connections very slowly to allow
the oil pressure to dissipate
gradually. Do not allow oil to squirt
or spray.
5. Cap the boom function gear pump holes and
the hoses holes.
6. Remove the boom function gear pump screws.
7. Remove the boom function gear pump.
