12 ► PP10 User Manual
TROUBLESHOOTING
If symptoms of poor performance develop, the following chart can be used as a guide to correct the problem.
When diagnosing faults in operation of the Post Puller, always check that the hydraulic power source is supplying
the correct hydraulic ow and pressure to the post puller as listed in the table. Use a owmeter known to be accu-
rate. Check the ow with the hydraulic oil temperature at least 80 °F/27 °C.
PROBLEM CAUSE SOLUTION
Post puller does not run. Power unit not functioning. Check power unit for proper ow
and pressure (3–9 gpm/11–34 lpm,
2000 psi/140 bar).
Coupler or hoses blocked. Remove restriction.
Mechanical failure of lift cylinder
assembly.
Disassemble post puller and
inspect for damaged parts.
Post puller does not pull effectively. Power unit not functioning. Check power unit for proper
pressure (2000 psi/140 bar).
Couplers or hoses blocked. Remove restriction.
Post puller operates slow. Low gpm supply from power unit. Check power source for proper ow
(3–9 gpm/11–34 lpm).
Coupler or hoses blocked. Remove restriction.
Relief valve set too low. Adjust relief valve to 2100–2250
psi/145–155 bar.
Post puller gets hot. Hot uid going through tool. Check power unit. Make sure the
ow rate is not too high causing
part of the uid to go through the
relief valve. Provide cooler to
maintain proper uid temperature
(140 °F/60 °C max). Check relief
valve setting.
Eliminate ow control devices.
