Troubleshooting - Enerpac Pow’r-Riser PR Serie Hoja De Instrucciones

7.0 TROUBLESHOOTING

The information in the Troubleshooting Guide (refer to Table 9) is
intended as an aid to help diagnose and correct various possible
problems that may occur.
For repair service, contact your local Enerpac Authorized Service
Center. Only an Enerpac Authorized Service Center should
service the jack and its components.
Symptom Possible Cause
1. Sporadic cylinder Air trapped in hydraulic system.
action.
Low oil level in hydraulic reservoir.
Seal wear and/or other internal damage.
2. Noisy operation. Air trapped in hydraulic system.
Low oil level in hydraulic reservoir.
Air leaks in hydraulic system.
Clogged or blocked pump intake
screen.
3. Oil is overheating. Low oil level in hydraulic reservoir.
Oil viscosity too high or too low.
High pressure leakage at the pump.
4. Pump runs but will not Seal wear and/or other internal damage.
pump oil.
OR
Control valve needs repair.
Cylinder moves but
will not lift load.
5. Cylinder extends but Insuffi cient compressed air volume.
will not retract.
Internal pressure leaks, or leaking retract
hoses.
Internal relief valve setting or retract side
relief valve setting too low.
Defective over-center valve, secondary
lock valve or control
Pump not developing enough pressure.
6. Pump does not run. Insuffi cient compressed air volume.
Moisture in compressed air.
Air muffl er frozen or clogged with ice.
Air motor frozen or clogged with ice.
Air motor corroded, damaged, worn or
seized.
Pump element damaged, worn or
seized.
7. Jack is diffi cult to Low tire infl ation pressure.
roll on wheels.
Wheel bearings need lubrication.
Wheel locknut out of adjustment.
Table 9 - Troubleshooting Guide
Solution
Cycle cylinder up and down several times to bleed trapped air.
Add Enerpac HF oil as required.
Have hydraulic system inspected by Enerpac Authorized Service Center.
Repair or replace components as required.
Cycle cylinder up and down several times to bleed trapped air.
Add Enerpac HF oil as required.
Check all points where air might leak into system.
Have hydraulic reservoir and intake screen fl ushed and cleaned by
Enerpac Authorized Service Center.
Add Enerpac HF oil as required.
Drain and refi ll reservoir with Enerpac HF oil.
Have hydraulic system inspected by Enerpac Authorized Service Center.
Repair or replace components as required.
Have hydraulic system inspected by Enerpac Authorized Service Center.
Repair or replace components as required.
Have control valve inspected by Enerpac Authorized Service Center.
Repair or replace as required.
Check air regulator setting. Increase volume of compressed air or increase
size of supply air line to meet airfl ow and pressure requirements.
Have hydraulic system inspected by Enerpac Authorized Service Center.
Repair or replace components as required.
Have hydraulic system inspected by Enerpac Authorized Service Center.
Repair or replace components as required.
Have hydraulic system inspected by Enerpac Authorized Service Center.
valve. Repair or replace components as required.
Have hydraulic system inspected by Enerpac Authorized Service Center.
Repair or replace components as required.
Check air regulator setting. Increase volume of compressed air or increase
size of supply air line to meet airfl ow and pressure requirements.
Be sure that compressed air is clean, dry and free of water.
Clean the air muffl er. Be sure compressed air is clean, dry and free of
water. Check lubricant level in air line lubricator. Use only SAE 10 [ISO 32]
detergent oil or an approved antifreeze lubricant.
Be sure compressed air is clean, dry and free of water. Check lubricant level
in air line lubricator. Use only SAE 10 [ISO 32] detergent oil or an approved
antifreeze lubricant.
Have air motor inspected by Enerpac Authorized Service Center. Repair or
replace as required.
Have pump element inspected by Enerpac Authorized Service Center.
Repair or replace as required.
Check tire infl ation pressure. Add air if low.
Pressure should be 90 psi [6,2 bar].
Apply grease to wheel bearings. See Section 6.6.
Loosen locknut until wheel rotates freely.
9
CAUTION: Never tighten or loosen hydraulic fi ttings
while jack hydraulic system is pressurized.