Diagnosis And Maintenance - Delco Pressure Washers Operator's Manual

DIAGNOSIS AND MAINTENANCE

PROBLEM
Low Pressure
Pulsation, pump runs
extremely rough, pressure low.
Water leakage from under
the manifold
Oil leak between crankcase
and pumping section *Slight leakage.
Oil leaking in area of crankshaft
Excessive play in the end of
the crankshaft.
Water in crankcase
inside of the crankcase
Oil leaking at the rear portion
of the crankcase
Loud knocking noise in pump
Frequent or premature failure
of the packing
Strong surging at the inlet
and low pressure at the discharge side.
Versa 5300 Owner's Manual
PROBABLE CAUSE
Worn nozzle
Belt slippage.
Air leak in inlet plumbing.
Pressure gauge inoperative or not
registering accurately.
Relief valve stuck partially plugged or
improperly adjusted.
Worn seat or valves.
Inlet suction strainer clogged or
improprly sized.
Worn seals. Abrasives in pumped
fluid, severe cavitation; inadequate
water supply, stressful inlet conditions.
Fouled or dirty inlet or discharge valves.
Worn inlet or discharge valves.
Leaky discharge hose.
Faulty Pulsation Dampener
Restricted inlet or air entering inlet plumbing.
Stuck inlet or discharge valve
Worn seals.
Worn crankcase seals.
Worn crankshaft seal
Bad bearing .
Worn bearing .
Humid air condensing into water.
Leaking of crankcase seals or
seals installed backward.
Damaged or improperly installed oil guage,
crankcase cover, or drain plug o-ring.
Pulley loose on crankshaft.
Worn bearing, connecting rod or crankshaft.
Stressful inlet conditions.
Cracked or scored plungers
Abrasive material in the fluid being pumped
Check supply tank for contamination.
Excessive pressure and/or temperature
of fluid being pumped.
Over pressure of inlet or discharge
Running pump dry.
Foreign particles in the inlet or discharge
valve or worn inlet or discharge valves.
contamination, Install and regularly clean filter. Do not pump
Replace nozzle of proper size.
Tighten or replace; use correct belt.
Use PTFE liquid or tape.
Check pressure with new guage and replace as needed.
Clean and reset relief valve to system pressure
and correct by-pass. Check supply tank for contamination.
Clean or replace with valve kit.
Use adequate size for inlet pump connection
and fluid being pumped. Clean frequently.
Install and maintain proper filter, check line
size and flow available to pump. Install a C.A.T.
Clean inlet and discharge valve assemblies.
Replace with valve kit.
Replace hose. Check connections.
Check precharge (should be 30-50%) of system
pressure or replace as needed.
Check filters and clean as needed. Check fittings and use
PTFE liquid or tape for air tight connection.
Clean or replace valve. Check supply tank for contamination.
Replace with seal kit, check inlet pressure and system
temperature, use Thermo Valve in by- inlet pressure regulator
in inlet line.
Replace crankcase seals
Replace damaged seals.
Replace bearing.
Replace bearing.
Change oil every 3 months or 500 hours intervels using
premium grade 10W30 Non-detergent hydraulic oil,
(other approved oil every month or 200 hours.)
Replace seals. Follow proper installation procedure.
Contact Cat Pumps supplier for crankcase servicing.
Replace oil gauge, crankcase cover or drain plug o-ring.
Thread in oil guage and drain plug hand tight to avoid
extruding o-ring.
Check key and tighten screw.|
Consult Cat Pumps supplier for crankcase servicing.
Install C.A.T.
Replace plungers
Install proper filtration on pump inlet plumbing.
Check pressure and fluid inlet temperature; be sure they are
within specified range.
Reduce pressure per specifications.
DO NOT RUN PUMP WITHOUT WATER!
Check for smooth surfaces on inlet and discharge valve seats.
Replace with kit if pitted or worn. Check supply tank for
abrasive fluids.
1 3
SOLUTION