Ridge Tool Company
10
HKO-186/1810, FKO-186/1810 Hydraulic Knockout Sets
Troubleshooting Table - Pump
PROBLEM
POSSIBLE CAUSE
REMEDY
Pump not delivering oil
Pump losing pressure
Pump does not
reach full pressure
Handle raises
after each stroke
Pump handle can be
pushed down (slowly)
without advancing ram.
Pump handle operates
with a spongy action.
Low oil level in reservoir
Dirt in pump body
Ball check seats worn and not seating properly
Reservoir overfilled with oil
Check valve springs weak or broken
Oil leaking past outlet ball seat
Damaged or dirty control valve seat
Low oil level
Internal relief valve set too low
Reservoir overfilled with oil
Oil leaking past outlet ball seat(s)
The inlet check ball is not seating
Air has been trapped in the line
Reservoir overfilled with oil
Low oil level in reservoir
Check oil level per instructions
Disassemble pump body and clean all parts
Reseat required seats in casting
Check oil level per reservoir instructions
Replace springs
Reseat ball seat
Reseat pressure control assembly and/or replace
assembly
Check oil level per reservoir instructions
Send to service center
Check oil level per reservoir instructions
Replace ball and/or reseat
Check for dirt and/or reseat valve seat
Set ram lower than the pump and extend and
return ram several times
Check oil level per reservoir instructions
Fill to proper level and bleed the system
