Instruction Manual
DHS-05 & DHS-1 Spreader - V1.4
www.durapac.com
Page 7 of 10
7.0
Troubleshooting
Problem
Cause
Solution
Spreader 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
Spreader 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
Spreader 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
Spreader 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
