Instruction Manual
HP-35A Press - V1.0
www.durapac.com
Page 7 of 11
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
Pump/valve malfunctioning
Check pump or valve
operating instructions
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
Weak or broken retraction springs
Send to service centre for
repair
Internally damaged cylinder
Send to service centre for
repair
Pump reservoir too full
Drain hydraulic fluid to
correct level
Erratic Action
Air in the system or pump
cavitation
Add fluid, bleed air and check
for leaks as described in the
Maintenance Section
External leakage
Replace worn packings
Check for excessive
contamination 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 as
described in the Maintenance
Section
