KTM STREAMLINE L-IV 50, Operation And Service Manual, Page: 59 / 178

SECTION 5
TROUBLESHOOTING
p. 5-4 05148382
Water Leak at HP Plunger
Seal
Replace seal assembly if leak exceeds one drop in 10
strokes.
Check plunger surface and cylinder bore for build-up of
seal material and polish off with 600 emery cloth,
polishing the cylinder circumferential and plunger
any direction
Check Plunger surface and cylinder bore for scratches
circumferential and longitudinal, if any are found,
contact IR for possible rework and polishing.
Check plunger for dull finish, contact IR for polishing.
Water Leak at Sealing
Head
Check torque of sealing head screws.
Check for scratches on inside diameter of HP cylinder.
Polish if required with 600 emery cloth.
Check for scratches in area of sealing head seal. Polish
if required with 600 emery cloth.
5.2.4 HP Check Valve Leak
If there are no visible HP water leaks, but there are
higher temperatures on HP cylinder or sealing head,
this indicates a HP or LP check valve leak. Use
corrective action listed in
5.5 for both discharge and
inlet checks:
5.2.5 Normal Temperature, but Check Valve Problem
Follow the instructions for HP check valve leak
described in 5.5 .
5.2.6 HP Cutting Water Too Low
Low Hydraulic Pressure
Setting
If in LO, turn pressure switch to HI. Check hydraulic
pump pressure setting.
HP Water Filter Clogged Clean or replace filter.
Worn HP Orifice Replace orifice.
5.3 TROUBLESHOOTING – LP WATER
5.3.1 Low Booster Pump Pressure
Booster pump pressure
below 60 psi
If at anytime the pump is running and the booster
pump pressure falls below 60 psi, adjust the relief
valve clockwise to increase the pressure above 60
psi.
If the booster pump pressure cannot be adjusted above
60 psi, replace the booster pump.