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 tool, always make sure the hydraulic power source is supplying the cor- rect hydraulic flow and pressure as listed in the table. Use a flowmeter know to be accurate. Check the flow with the hydraulic fluid temperature at least 80 °F/27 °C.
PROBLEM | CAUSE | SOLUTION |
Tool does not run. | Power unit not functioning. | Check power source for proper flow and |
|
| pressure |
|
| bar). |
| Couplers or hoses blocked. | Remove restriction. |
| Pressure and return line hoses | Be sure hoses are connected to their proper |
| reversed at ports. | ports. |
| Mechanical failure of piston or | Disassemble post driver and inspect for |
| automatic valve. | damaged parts. |
Tool does not hit | Low accumulator charge (pressure | Recharge accumulator. Replace diaphragm if |
effectively. | hose will pulse more than normal). | charge loss continues |
| Power unit not functioning. | Check power unit for proper flow and pressure |
|
| |
| Couplers or hoses blocked. | Remove restriction. |
| Fluid too hot (above 140 °F/60 °C). | Provide cooler to maintain proper oil |
|
| temperature (130 °F/55 °C maximum). |
| The anvil is not sliding freely in the | Remove, clean, lubricate and replace anvil as |
| post driver foot. | required. |
Tool operates slowly. | Low gpm supply from power unit. | Check power source for proper flow |
|
| |
| High | Check hydraulic system for excessive back- |
|
| pressure (over 250 psi/17 bar). |
| Couplers or hoses blocked. | Remove restriction. |
| Orifice blocked. | Remove restriction. |
| Fluid too hot (above 140 °F/60 °C) | Check power source for proper fluid |
| or too cold (below 60 °F/16 °C). | temperature. Bypass cooler to warm fluid up or |
|
| provide cooler to maintain proper temperature. |
| Relief valve set too low. | Adjust relief valve to |
|
| bar. |
| The anvil is not sliding freely in the | Remove, clean, lubricate and replace as |
| post driver foot. | required. |
Tool gets hot. | Hot fluid going through tool. | Check power unit. Be sure flow rate is not too |
|
| high causing part of the fluid to go through the |
|
| relief valve. Provide cooler to maintain proper |
|
| fluid temperature (140 °F/60 °C max). |
|
| Check relief valve setting. |
|
| Eliminate flow control devices. |
Oil leakage on post. | Lower piston seal failure. | Replace seal. |
PD45 User Manual ◄ 13