September 2016
Part No. 1272852
GTH-5519
3-29
Section 3 • Repair Procedures
How to Prime the Hydrostatic
Transmission Pump
WARNING
Bodily injury hazard. This
procedure requires specific
repair skills, lifting equipment
and a suitable workshop.
Attempting this procedure
without these skills and tools
could result in death or serious
injury and significant component
damage. Dealer service is
strongly recommended.
1
Connect a 0 to 870 psi / 0 to 60 bar pressure
gauge to port TP3 (hydrostatic transmission
boost pressure test port).
2
Start the engine. Run at low idle for 5 seconds.
Shut the engine off and wait for 15 seconds.
3
Start the engine. Run at low idle for 10
seconds. Shut the engine off and wait for 15
seconds.
4 Note: Repeat step 3 until the pressure gauge
connected to TP3 reads 360 psi / 25 bar or
greater.
5
Apply the brake pedal and start the engine.
Shift the transmission into forward and
disengage the emergency brake.
6
Release the brake pedal and slowly increase
the engine rpm until the machine starts to
move. Apply the brake.
7
Shift the transmission into reverse. Release
the brake pedal and slowly increase the engine
rpm until the machine starts to move. Apply the
brake.
8
Engage the emergency brake and turn the
engine off. Check for hydraulic leaks.
HYDRAULIC PUMPS
