Durapac PHS-1900, Instruction Manual

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Instruction Manual
PHS-1900 Hydrostatic Pump - V1.0 www.durapac.com Page 8 of 8
7.0 Troubleshooting
Problem Cause Solution
Pump loses pressure Leaking system components

Repair or replace as necessary
Pump not delivering fluid Low fluid level in reservoir

Check fluid level
Worn seats

Repair seats

Replace pump body
Pump does not reach rated
capacity Low fluid level in reservoir

Check fluid level
Leaking system components

Repair or replace as necessary
Fluid leaking past inlet or
outlet checks

Repair inlet or outlet checks

Replace high pressure piston
seal
Pump handle has a
“spongy” feel Air trapped in system

Refer to 6.2 – Bleeding Air from
the System
Too much fluid in reservoir

Check fluid level
Cylinder piston will not
extend Loose couplers

Tighten couplers
Low fluid level in pump
reservoir

Fill and bleed the system
Leaking cylinder seals

Replace worn seals. Look for
excessive contamination or
wear
Cylinder piston extends
only partially Low fluid level in pump
reservoir

Fill and bleed the system
Load above capacity of system

Use correct equipment
Cylinder piston extends
slower than normal Loose couplers

Tighten couplers
Restricted hydraulic line or
fitting

Clean and replace if damaged
Pump not operating correctly

Check pump’s operating
instructions

Repair or replace as necessary
Low fluid level in pump
reservoir

Fill and bleed the system
Cylinder does not hold
pressure Leaky connection

Clean, reseal with thread
sealant, and tighten
connection
Leaking cylinder seals

Replace worn seals

Look for excessive
contamination or wear

Replace contaminated fluid
Pump or valve not operating
correctly

Repair or replace as necessary
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 fluid to correct level