KTM STREAMLINE L-IV 50, Operation And Service Manual, Page: 61 / 178

SECTION 5
TROUBLESHOOTING
p. 5-6 05148382
5.5 SPECIAL PROCEDURE—HP WATER CHECK VALVE TROUBLESHOOTING
5.5.1 HP Check Valve Troubleshooting
A leaking HP check valve is suspected if either HP cylinder or sealing head is
unusually hot. Compare temperatures of opposing sealing heads or HP
cylinders to decide location of hot spot. Note any heat in LP water.
The display will tell you which direction is pumping faster. If the leak is bad
enough, the intensifier will shut down and the display will tell you where to
look for the problem. For instance, if the display indicates a Left Stroke
Warning or Shutdown, the probable problem is either at Left Inlet Valve or
Right Discharge Valve. You can usually confirm which it is by feeling heat on
one side or another.
NOTE: The bolted flange / metal-to-metal seal arrangement of the SL-IV Plus sealing
head make the INLET check valves much more difficult to access for
maintenance than the HP OUTLET check valves. Therefore one should
generally rule out problems with the OUTLET HP check valves prior to
disassembling the INLET check valves.