Terex PT-100G Forestry Service Manual page 115

Check your readings against that stated below. If your
readings differ, relief replacement and or component
repair may be required.
5100 PSI (35160kPa) the relief is reached in
Pressures should read:
attempted forward or reverse motion.
•
8. If one reading is low, swap the relief valve with a
Drive pressure troubleshooting:
similar one and recheck. If the reading improves,
replace the faulty relief valve.
9. If two readings are low, but on different circuits
(pumps), perform step 8 for both.
10. If both readings are low on one pump, disconnect
the drive hoses from the suspected ports and plug
them at the pump. Cap the hoses to prevent con-
tamination and then recheck the pressures at
those ports. If the reading improves, the drive
motor is at fault. If the reading does not improve,
one pump (in the tandem assembly) is at fault.
11. If all 4 readings are low, it is unlikely that all four
relief valves are faulty. The tandem pumps are
most likely not working properly.
Relief Valves
17-9
Reverse Test Ports
17-10
Forwad Test Ports
17-5
Compact Track Loader
17. Hydraulic Pressure & Flow