Durapac DRJ-10, Instruction Manual

Page: 8 / 10

Instruction Manual
DRJ-10 Rail Jack - V1.2 www.durapac.com Page 8 of 10
7.0 Troubleshooting
Problem Cause Solution
Jack will not lift load Release valve not fully closed

Close valve firmly
No oil or low oil level

Top-up to correct level
Air-locked system

Refer to 6.2 - Bleeding Air
from the System
Load is above capacity of system

Use correct equipment
Erratic Action Air in system

Refer to 6.2 - Bleeding Air
from the System
Viscosity of oil too high

Change to lower viscosity oil
Internal leakage in cylinder

Replace worn seals

Check for excessive
contamination or wear
Cylinder sticking or binding

Check for dirt, gummy
deposits or leaks

Check for misalignment, worn
parts or defective seals
Jack will not lift smoothly
or to full height Oil level low

Top-up to correct level
Air in system

Refer to 6.2 - Bleeding Air
from the System
Cylinder sticking or binding

Check for dirt, gummy
deposits or leaks

Check for misalignment, worn
parts or defective seals
Jack advances slowly Pump not working correctly

Rework pump
Leaking seals

Replace seals
Jack advances but does
not hold load Pump check valve not working
correctly

Clean/replace check valve
Cylinder seals are leaking

Replace seals
Overload valve leaking or not
adjusted correctly

Replace / adjust overload
valve
Jack leaks oil Worn or damaged seals

Replace seals
Jack will not retract or
retracts slowly Release valve is closed

Open release valve
Cylinder damaged internally

Send to a Durapac authorised
service centre for repair
Reservoir too full

Drain oil to correct level