Ridge Tool Company
9
HKO-186/1810, FKO-186/1810 Hydraulic Knockout Sets
PROBLEM
POSSIBLE CAUSE
REMEDY
Erratic Action
Cylinder does
not advance
Cylinder extends
only partially
Cylinder advances
slower than normal
Cylinder leaks oil
Cylinder will not
retract or retracts
slower than normal
Troubleshooting
Troubleshooting Table - Ram
Air in system
Leakage in cylinder
Cylinder sticking or binding
Pump release valve open
Low or no oil in pump reservoir
Air locked in pump
Loose couplers
Plugged hydraulic line
Pump not operating correctly
Pump reservoir is low on oil
Cylinder piston rod binding
Loose connection
Leaky connection
Restriced hydraulic line or fitting
Pump not operating correctly
Leaky seals
Worn or damaged seals
Loose connections
Worn/scored cylinder wall
Pump release valve closed
Couplers not fastened
Blocked hydraulic lines
Weak or broken return springs
Cylinder damaged internally
Pump reservoir too full
Bleed air and check for leaks
Replace worn packings. Check for excessive con-
tamination or wear
Check for dirt, gummy deposits or leaks as above.
Check for misalignment, worn parts or defective
piston seal
Close release valve
Fill with oil and bleed the system
Bleed the system
Tighten couplers and bleed
Flush and clean system
Review Troubleshooting Table for pump
Fill and bleed the system
Check for dirt, gummy deposits, or leaks as
above. Check for misalignment, worn parts or
defective packing
Tighten and bleed the system
Clean connection and use a non-hardening pipe
thread compound or PTFE tape if needed
Clean or replace if damaged
Review Troubleshooting Table for Pump
Replace seals
Replace seals
Tighten fittings
Repair or replace
Open pump release valve
Fasten couplers
Clean and flush
Send to service center
Send to service center
Drain oil to correct level
