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Scheduled Maintenance
5.4 Ultra High Pressure Pump
Scheduled Maintenance
The 40K UHP pump operates at very high pres-
sure and has specic lubrication and maintenance
requirements. Refer to the Maintenance Matrix
in this section and the pump manufacturer’s op-
erating and maintenance manual for lubrication
specications and maintenance schedules.
Daily Inspection and Maintenance
• Check the crankcase lubricating oil level.
NOTICE:
THE PROCEDURE FOR CHECKING THE CRANKCASE OIL
LEVEL IS DIFFERENT FOR WHEN THE PUMP HAS NOT BEEN
OPERATING FOR 5 OR MORE HOURS AND WHILE THE PUMP
IS IN OPERATION. REFER TO UHP PUMP CRANKCASE OIL
LEVEL CHECK PROCEDURE IN THIS SECTION FOR THE
CORRECT PROCEDURES FOR CHECKING THE CRANKCASE
OIL.
• Check for obvious loose mounting nuts and
bolts.
• Inspect all hoses, ttings, valves and seals for
leaks and proper operation. Repair or replace
leaking or malfunctioning components before
operating the system.
• Make sure cooling water is owing to the
plunger packing seals when the charge water
is activated. Constant water ow is essential
to lubricate and cool the seals. Adjust ow
with the metering valves or replace packing
if necessary.
• Make sure the cooling water sump and drain
are clean for proper drainage.
• Check for water dripping from the UHP Pump
manifold weep holes during the high pressure
test. Water dripping from the square holes
indicates the face seals are leaking. Water
leaking from round holes indicates the high
pressure seals are leaking. Find and correct
the problem before waterblasting.
• Test the diverter (dump) valve for proper op-
eration daily. Never operate the system if the
dump valve is not working properly.
• Test the manual bypass valve and make sure
it is operating properly.
UHP Pump & Packing Lube Metering Valves
UHP Pump Packing Lube Lines & Sump
Metering Valves
UHP Pump Weep Holes
Face Seal Weep Holes
High Pressure Weep Holes
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