6
Operating Instructions
www.chpower.com
Storage
1 . When not in use, hose and
compressor should be stored in a
cool dry place .
2 . Tanks should be drained of moisture .
and hose should be disconnected
and hung with open ends down to
allow any moisture to drain .
3 . Protect the electrical cord from
possible damage by winding the
cord loosely around the handle of
the unit or coiling the cord up .
MAInTenAnCe SCheDUle
OPeRATIOn
DAIly
Weekly
MOnThly
3 MOnThS
CHECK OIL LEVEL
l
DRAIN TANK
l
CHECK AIR FILTER
l
CHECK SAFETY VALVE
l
CLEAN UNIT
l
CHECK BELT TIGHTNESS
l
CHANGE OIL
l
TORqUe ReqUIReMenTS (in/lbs)
Model
Compressor
head Bolts
Bearing
Cap Bolts
VS
100-125
50-120
VT
225-300
50-120
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 . Air leaks
2 . 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 .
3 . Restricted air intake
3 . Clean the air filter element .
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 or compressor pulley
1 . Loose motor or compressor pulleys are a very common cause of
compressors knocking . Tighten pulley clamp bolts and set-screws .
2 . Lack of oil in crankcase
2 . Check for proper oil level; if low, check for possible damage to
bearings . Dirty oil can cause excessive wear .
3 . Worn connecting rod
3 . Replace connecting rod . Maintain oil level and change oil more
frequently .
4 . Worn piston pin bores
4 . 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 .
5 . Piston hitting the valve plate
5 . 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 .
6 . Noisy check valve in compressor
system
6 . Replace .
Do not disassemble check
valve with air pressure in tank
