16
TROUBLESHOOTING GUIDE (continued)
Problem
Possible Cause
Action
Oil leakage
Loose connections.
Tighten loose connections. Replace any worn or
damaged connectors.
Worn or damaged components.
Repair or replace components as required.
Jerky or erratic pump operation.
Low air pressure or volume at plant air supply.
Check plant air supply.
Air in hydraulic lines.
Remove air as described in Section 5.10 of this
manual.
Hydraulic oil dirty.
Change hydraulic oil. Use Enerpac HF oil. Refer to
Section 8.2 of this manual.
Low oil level in reservoir.
Check oil level. Add oil as required. Refer to sections
5.3 and 5.4 of this manual.
Pump suction strainer elements dirty.
Replace pump suction strainer elements. Refer to
Section 8.3 of this manual.
Internal leakage in pump element. Pump element
worn or damaged.
Contact Milwaukee Cylinder customer service
representative.
Excessive moisture in pump
exhaust.
Excessive water and/or lubricant in supply air.
Reduce moisture in air. Install water separator.
Note:
Pump components are self-lubricating.
Lubricated air is permitted, but not required.
Pump air fi lter bowl needs draining.
Check bowl for water. Drain as required. Refer to
Section 8.4 of this manual.
Pump air fi lter dirty.
Clean air fi lter element. Refer to Section 8.4 of this
manual.
Internal leakage in pump element. Pump element
damaged or worn.
Contact Milwaukee Cylinder customer service
representative.
Air leakage.
Loose air system connections.
Tighten connections as required.
Worn or damaged air system components.
Repair or replace components as required.
Cylinder drift.
External system leak.
Repair or replace leaking components as required.
Internal leak in system component.
Repair or replace leaking components as required.
Low oil fl ow rate.
Reservoir not vented.
Open vent screw on reservoir. Refer to Section 5.7 of
this manual.
Pump air fi lter bowl needs draining.
Check bowl for water. Drain as required. Refer to
Section 8.4 of this manual.
Pump air fi lter dirty.
Clean air fi lter element. Refer to Section 8.4 of this
manual.
Internal leakage in pump element. Pump element
worn or damaged.
Contact Milwaukee Cylinder customer service
representative.
Low air pressure or volume at air supply.
Check air supply.
Pump air pressure regulator set too low.
Check regulator setting. Refer to Section 5.9 of this
manual.
Pump suction strainer elements dirty.
Replace pump suction strainer elements. Refer to
Section 8.3 of this manual.
Cylinder will not return.
Return fl ow blocked or restricted.
Check system for blockages and make repairs
as required. Be sure that all couplers are fully
connected.
Control valve malfunction.
Repair or replace control valve as required.
