Durapac RFJ Series, Instruction Manual, Page: 7 / 12

Instruction Manual
RFJ Series SA Flat Cylinders - V1.6 www.durapac.com Page 7 of 12
6.5 Use dust caps when cylinder is disconnected from the hose. Keep entire cylinder clean
to prolong cylinder life.
6.6 Wipe thoroughly clean and store cylinders upright (to prevent seal distortion) in a
clean, dry environment. Avoid temperature extremes.
6.7 Change hydraulic oil in your system as recommended in the pump instruction sheet.
7.0 Troubleshooting
Problem Cause Solution
Cylinder moves but
does not maintain
pressure Leaking connection

Clean, reseal with thread sealant and
tighten connection
Leaking cylinder seals

Replace worn seals

Check for excessive contamination or wear

Replace contaminated fluid as necessary
Malfunctioning
pump/valve

Check pump or valve operating instructions

Repair or replace as necessary
Cylinder leaks
hydraulic fluid Worn or damaged seals

Replace worn seals

Check for excessive contamination or wear

Replace contaminated fluid as necessary
Loose connections

Clean, reseal with thread sealant and
tighten connection
Cylinder will not
retract or retracts
slower than normal Closed pump release
valve

Open pump release valve
Loose couplers

Tighten couplers
Blocked hydraulic lines

Clean and flush lines
Weak or broken
retraction springs

Send to a Durapac authorised service centre
for repair
Internally damaged
cylinder

Send to a Durapac authorised service centre
for repair
Pump reservoir too full

Drain hydraulic fluid to correct level
Erratic Action Air in system or pump
cavitation

Add fluid, bleed air and check for leaks
External leakage

Replace worn packings

Check for excessive contamination fluid as
necessary

Replace contaminated fluid as necessary
Sticking or binding
cylinder

Check for dirt or leaks

Check for bent, misaligned, worn parts or
defective packings
Cylinder does not
move Loose couplers

Tighten couplers
Faulty coupler

Verify that female coupler is not locked up
(ball wedged into seat)

Replace both male and female couplers
Improper valve position

Close release valve or shift to new position
Low or no hydraulic
fluid in pump reservoir

Fill and bleed the system
Air-locked pump

Prime pump according to pump operating
instructions