Genie GTH-636 Service Manual page 168

Section 5 • Troubleshooting
TROUBLESHOOTING
10 Stop the engine.
11 Separate the hoses connected together in step
7, and install them into the correct ports of the
boom activated rear lock-up manifold. Torque
to specification. Refer to Section 2,
Specifications.
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.
Check the Rear Lock-up Manifold
12 Tee in a 0 to 3500 psi / 0 to 250 bar pressure
gauge at port P of the boom activated rear
lock-up manifold. Torque to specification. Refer
to Section 2, Specifications.
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 - 20 GTH-636 • GTH-644 • GTH-842 • GTH-844 • GTH-1048 • GTH-1056
13 Start the engine and allow the engine to idle.
Result:
GTH-644, GTH-842 and GTH-844 and
GTH-1056: The pressure gauge reads
3000 psi / 207 bar. The pressure setting is
correct. Proceed to step 14.
GTH-1048: The pressure gauge reads
3500 psi / 241 bar. The pressure setting is
correct. Proceed to step 14.
Result: The pressure is low. There is blockage
in the hoses. Troubleshoot the hoses until
blockage is found.
14 Stop the engine.
15 Tee in a 0 to 3500 psi / 0 to 250 bar pressure
gauge at port C1 of the boom activated rear
lock-up manifold. Torque to specification. Refer
to Section 2, Specifications.
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.
June 2007
REV A
Part No. 97487