Troubleshooting Chart - Husky VT631402AJ Operating Instructions Manual

Operating Instructions

Troubleshooting Chart

Symptom
Low discharge pressure
Pump overheating causes
air filter to melt
Excessive noise (knocking)
Large quantity of oil in
the discharge air
nOTe: In an oil lubricated
compressor there will
always be a small amount
of oil in the air stream .
Water in discharge air /
tank
Motor hums and runs
slowly or not at all
possible Cause(s)
1 . Air demand exceeds pump capacity
2 . Restricted air intake
3 . Air leaks (fittings, tubing on
compressor, or plumbing outside of
system)
4 . Blown gaskets
5 . Leaking or damaged valves
1 . Insulating gasket between filter and
head is missing
2 . Broken valves/blown gasket
1 . Loose motor pulley or flywheel
2 . Loose fasteners on pump or motor
3 . Lack of oil in crankcase
4 . Worn connecting rod
5 . Worn piston pin bores
6 . Piston hitting the valve plate
7 . Noisy check valve in compressor
system
1 . Worn piston rings
2 . Compressor air intake restricted
3 . Excessive oil in compressor
4 . Wrong oil viscosity
Normal operation . The amount of
water increases with humid weather
1 . Low voltage
2 . Too many devices on same circuit
3 . Loose electrical connections
4 . Malfunctioning pressure switch -
contacts will not close
5 . Malfunctioning check valve
6 . Defective unloader valve on
pressure switch
7 . Defective motor capacitor(s)
8 . Defective motor
Corrective Action
1 . Reduce air demand or use a compressor with more capacity .
2 . Clean or replace the air filter element .
3 . Listen for escaping air . Apply soap solution to all fittings and
connections . Bubbles will appear at points of leakage . Tighten or
replace leaking fittings or connections . Use pipe thread sealant .
4 . Replace any gaskets proven faulty on inspection .
5 . Remove head and inspect for valve breakage, misaligned valves,
damaged valve seats, etc . Replace defective parts and reassemble .
Install a new head gasket
each time the head is removed
1 . Install gasket .
2 . Replace valves or install new gasket .
1 . Tighten pulley / flywheel clamp bolts and set-screws .
2 . Tighten fasteners
3 . Check for proper oil level; if low, check for possible damage to
bearings . Dirty oil can cause excessive wear .
4 . Replace connecting rod . Maintain oil level and change oil more
frequently .
5 . Remove piston assemblies from the compressor and inspect for
excess wear . Replace excessively worn piston pin or pistons, as
required . Maintain oil level and change oil more frequently .
6 . Remove the compressor head and valve plate and inspect for
carbon deposits or other foreign matter on top of piston . Replace
head and valve plate using new gasket . See Lubrication section for
recommended oil .
7 . Replace check valve .
Do not disassemble check
valve with air pressure in tank
1 . Replace with new rings . Maintain oil level and change oil more
frequently .
2 . Clean or replace filter . Check for other restrictions in the intake
system .
3 . Drain down to full level .
4 . Use Mobil 1 10W-30 .
®
1 . Drain tank more often . At least daily .
2 . Add a filter to reduce the amount of water in the air line .
1 . Check incoming voltage . It should be approximately 230 volts .
Motor will not run properly on 208 volts . Low voltage could be
due to wires (from electrical source to compressor) being too small
in diameter and / or too long . Have a qualified electrician check
these conditions and make repairs as needed .
2 . Limit the circuit to the use of compressor only
3 . Check all electrical connections
4 . Replace pressure switch .
5 . Replace check valve .
Do not disassemble check
valve with air pressure in tank
6 . Replace unloader valve
7 . Replace capacitor(s)
8 . Replace motor
8