HIGH PRESSURE PUMP SYSTEM
TROUBLESHOOTING GUIDE
MALFUNCTION
CAUSE
REMEDY
The Pressure and/or the product
amount drops
Broken valve spring
Belt slippage (BML Series)
Fouled inlet strainer
Fouled pre-filter(s)
Cavitation (Noisy operation)
Air in system
Replace spring
Tighten or replace belt
Clean strainer
Replace filter cartridge(s)
Check suction lines for restrictions
Check suction lines for leaks
Water in crankcase
High temperature fluctuation
High humidity
Cracked ceramic plunger/s
Replace oil
Reduce oil change interval
Replace ceramic plunger/s
Noisy operation
Worn bearings
Cavitation
Replace bearings, refill crankcase with
recommended lubricant
(SAE 90 gear box oil, non detergent)
Check inlet lines for restrictions and/or
proper size.
Check strainer and filter(s)
Inability to build up pressure
Discharge valve chamber has air
trapped within it
Allow more time to prime and ensure
that there are no air suction leaks.
Rough/Pulsating operation with
pressure drop
Worn packing
Inlet restriction
Cavitation
Replace packing
Check system for restrictions or air
leaks.
Check inlet lines for restrictions
Excessive leakage between the
high pressure pump manifold and
rear crankcase section
Worn plunger(s)
Worn packing seals
Cracked plunger(s)
Replace plunger(s)
Replace packing seals
Replace plunger(s)
High crankcase temperature
(higher than 78
°
C)
Wrong grade of oil
Improper amount of oil in crankcase
Use specified type of oil.
Adjust oil level to proper amount
Summary of Contents for Watermakers 1200-BML-3
Page 17: ......