Husky VT631402 Operating Instructions Manual Download Page 8

Page: 8 / 32

Operating Instructions

Troubleshooting Chart

Symptom

possible Cause(s)

Corrective Action

Low discharge pressure

1 . Air demand exceeds pump capacity

1 . Reduce air demand or use a compressor with more capacity .

2 . Restricted air intake

2 . Clean or replace the air filter element .

3 . Air leaks (fittings, tubing on

compressor, or plumbing outside of
system)

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 . Blown gaskets

4 . Replace any gaskets proven faulty on inspection .

5 . Leaking or damaged valves

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

Pump overheating causes
air filter to melt

1 . Insulating gasket between filter and

head is missing

1 . Install gasket .

2 . Broken valves/blown gasket

2 . Replace valves or install new gasket .

Excessive noise (knocking)

1 . Loose motor pulley or flywheel

1 . Tighten pulley / flywheel clamp bolts and set-screws .

2 . Loose fasteners on pump or motor

2 . Tighten fasteners

3 . Lack of oil in crankcase

3 . Check for proper oil level; if low, check for possible damage to

bearings . Dirty oil can cause excessive wear .

4 . Worn connecting rod

4 . Replace connecting rod . Maintain oil level and change oil more

frequently .

5 . Worn piston pin bores

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 . Piston hitting the valve plate

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 . Noisy check valve in compressor

system

7 . Replace check valve .

Do not disassemble check

valve with air pressure in tank

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 .

1 . Worn piston rings

1 . Replace with new rings . Maintain oil level and change oil more

frequently .

2 . Compressor air intake restricted

2 . Clean or replace filter . Check for other restrictions in the intake

system .

3 . Excessive oil in compressor

3 . Drain down to full level .

4 . Wrong oil viscosity

4 . Use Mobil 1

10W-30 .

Water in discharge air /
tank

Normal operation . The amount of
water increases with humid weather

1 . Drain tank more often . At least daily .
2 . Add a filter to reduce the amount of water in the air line .

Motor hums and runs
slowly or not at all

1 . Low voltage

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 . Too many devices on same circuit

2 . Limit the circuit to the use of compressor only

3 . Loose electrical connections

3 . Check all electrical connections

4 . Malfunctioning pressure switch -

contacts will not close

4 . Replace pressure switch .

5 . Malfunctioning check valve

5 . Replace check valve .

Do not disassemble check

valve with air pressure in tank

6 . Defective unloader valve on