SECTION 5
TROUBLESHOOTING
Jan 2001
Page 5-3
05114608
Oil or Water Leaks from HP Cylinder Weep Holes
Condition and Possible Causes Corrective Action
Oil Leak HP Intensifier Check hydraulic cylinder O-ring leakage.
Check proximity switch area for oil leakage.
Remove, inspect, replace or clean hydraulic seal
(cartridge).
Water Leak at HP Plunger
Seal
Replace seal assembly.
Check plunger and follower if leak exceeds about
1 drop in 10 strokes.
Check for scratches, circumferential or
longitudinal grooves, or material build up on
inside diameter of HP cylinder. Polish ID of
cylinder if required. Plunger should be
returned to KMT Waterjet if polishing is
needed.
Water Leak at Sealing
Head Seal
Check seal assembly.
Check for scratches on inside diameter of HP
cylinder. Polish if required.
Check for scratches in area of sealing head seal.
Polish if required.
Hot Hydraulic Oil
Restricted or No Cooling
Flow
Check cooling water flow to and from heat
exchanger.
Check setting of water modulating valve.
Check water pressure differential across heat
exchanger, 2.75 bar (40 psi) minimum required
for flow through the exchanger.
Check operation of water modulating valve.
Water Modulating Valve
Set High
Check and adjust setting of cooling water valve.
- Compressing spring slows water flow and
increases temp, de-compressing spring
increases water flow and lowers oil temp.
Heat Exchanger Clogged Flush heat exchanger, improve quality of cooling
water.
Low Cutting Water Pressure
Low Hydraulic Pressure
Setting
If in LO, turn pressure switch to HI.
Check hydraulic pump pressure setting.
Restricted or No Cutting
Water Supply
Check cutting water supply flow and pressure
Water Filter Clogged Check pressure differential at filter gages, and
replace elements if exceeds 1 bar (15 psi) while
the pump is operating.
Air Trapped Bleed air from cutting water plumbing.
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