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Troubleshooting Guide
PROBLEM
LOW OPERATING
PRESSURE
FLUCTUATING
PRESSURE
PRESSURE LOW
AFTER PERIOD OF
NORMAL USE
PUMP NOISY
PRESENCE OF
WATER IN PUMP OIL
MOTOR STRAINS
UNDER LOAD
(CONTINUED
ON NEXT PAGE)
POSSIBLE CAUSE
Faulty pressure gauge
Insufficient water supply
Old, worn or incorrect spray nozzle
Belt slippage
Plumbing or hose leak
Faulty or mis-adjusted unloader valve
(Where applicable)
Worn packing in pump
Fouled or dirty inlet or discharge valves in
pump
Worn inlet or discharge valves
Obstruction in spray nozzle
Leaking pressure control valve (where
applicable)
Insufficient power supply
Valves worn
Blockage in valve
Pump sucking air
Worn piston packing
Nozzle worn
Inlet or discharge valves worn
Inlet or discharge valves blocked
Unloader valve seat worn
Air in suction line
Broken or weak inlet or discharge valve
springs
Foreign matter in valves
Worn bearings
Excessive temperature of liquid
Oil seal worn
High humidity in air
Piston packing worn
Faulty motor
Incorrect spray nozzle
Obstruction in spray nozzle
Hotsy 1700 Operator's Manual 8.914-380.0 - BJ
SOLUTION
Install new gauge.
Use larger supply hose; clean filter at water
inlet.
Match nozzle number to machine and/or
replace with new nozzle.
Tighten or replace; use correct belt.
Check plumbing system for leaks. Re-tape
leaks with teflon tape.
Call local dealer. Tampering with the factory
setting may cause personal injury and/ or
property damage, and will void the manufac-
turer's warranty.
Install new packing kit.
Clean inlet and discharge valves.
Replace with valve kit.
Remove obstruction.
Rebuild or replace as needed.
Check voltage.
Check and replace if necessary.
Check and clean out if necessary.
Check water supply and
suction line for air seepage at joints.
Check and replace if necessary.
Check and replace if necessary.
Check and replace if necessary.
Check and clean if necessary.
Check and replace if necessary.
Check water supply and connections on
suction line.
Check and replace if necessary.
Check and clean if necessary.
Check and replace if necessary.
Reduce to below 75° C (160°F).
Check and replace if necessary.
Check and change oil twice as often.
Check and replace if necessary.
Send to nearest Baldor repair center.
Install proper nozzle size (see serial plate for
proper size).
Remove obstruction.
Maintenance
15
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