Troubleshooting; Troub|Eshooting - Campbell Hausfeld Air compressor Operating Instructions Manual

Maintenance (Cont.)
touching the rim on both sides of the
face. The belts should be parallel to this
straight edge (see Figure 9). Dimension
A should be the same as B and C to
ensure proper alignment of the belts.
Slots in the bed-plate allow for sliding
Troub|eshooting Chart
the motor back and forth to adjust belt
tension.
STORAGE
If compressor is to be stored for a short
period of time, make sure that it is
stored in a normal position and in a
cool protected area.
FLYWHEEL
STRAIGHTEDGE
Figure 9 - Top View
Cast Iron Series
MOTOR
DRIVE
A B PULLEY
SETSCREW C
Motor hums and runs slowly or
not at all
Reset mechanism cuts out
repeatedly or fuses blow
repeatedly
Excessive noise in operation
Milky oil in off reservoir
Excessiveoil consumption or oil
in air lines
Water in discharge air
Air blowing out of inlet
Insufficient pressure
I. Low voltage or no voltage
2. Shorted or open motor wlndin _g
3, Malfunchon_ng chech valve or unloader valve
4. Malfunctioning pressure switch - contacts will not
dose
1. Pre_ure switch set too high
2. Malfunctioning check valve
3. tncof_ct fuse size or magnetic starter heaters
4. Malfunctioning motor
5. Loose Wiring
1. Loose ulley, flywheel belt, belt guard, etc
2. Lack o_o I n crankcase
3. Com ressor floor mounting loose
4. Mal_°unctlonlng check valve
Water condensingin crankcase dueto high humidi-
ty
1. Be sure there is a problem
2. Restricted air intake
3. Wrong oil viscosity
4. Worn iston rings
5. Oil lea_s
6. Scored o/linder
I. Excessivewater in tank
2. Hot, humid weather
Broken first stage inlet valve (two-stage unit
Broken inlet varve (single stage un t
1. Air demand too high
2. Leaks or restrictions in hoses or piping
3. Slipping belts
I. Check with voltmeter check overload relay n magnetic starter or
reset switch on motor. If overload or reset switch trips repeatedly,
find and correct the cause, See next item
2, Replace motor
3. Replace check valve or unloader valve
4. Repair or reptace pressure switch
1. Adjust or replace
2, Clean or replace faultv valve
3, Be sure that fuses andheeters are rated properly
4. Replace motor
5. Check all erectrlcal connections
I. Tighten
2. Check for dama • to bearings replenlsh ell
3. Shim to level aa_ tighten or place on isloletor pads
4. Replace check valve
Pipe air intake to lesshumid air source Run pump
continuously for one hour
1. Diagnose ell €ontamlnetionp roblems by testing the d scharge a r or
measuring oil consumption from the crankcase
2. Crean or replace air filter
3, Drain oil. Refill with ell of proper viscosity
4. Replace ringss
S. Tighten beets replace gaskets or o-rings
6. Rep ace _/ nder
1. Drain tank
2. Purchase dryer
Replace valve assembly
1. Limit air usa e
2. Check for lea_s or restriction in hose or piping
3. Tighten belts
Tank does not hold pressure 1. Worn check valve 1. Replace check valve
when corn ressor is off and
shutoff valve is closed
Do not disassemble check valve
with air In tank
2. Check all connections and fittings for tightness 2. Tighten
3. Check tank for cracks or pin holes 3, Replace tank• Never repair a damaged tank
Excessive belt wear. Light dust 1. Pulley out of affgnment 1. Realign motor pulley
from start s norma. Worn be ts 2. Belts too tight or too loose 2. Adjust tension
separate at layers)
Tank pressure builds slowly 1. Dirty air filter 1. Clean or replace filter element
2. Blown cylinder head asket 2, Install new gasket
3. Worn/broken intake/_ischarge valves 3, Instafl new valve plate assembly
4. Air leaks 4, Tighten joints
Tank pressure builds up quickly Excessivewater in tank Drain tank, check speed. See Performance table
on compressor
ASME safety valve pops open 1. Wrong pressure switch setting
• . 1.Adjusttolowerpressure 175 simaximumfortwo-stageuntor135
while compressor is running psJ for single stage unit) ISee _peretion)
2. Malfunctioning ASME satiety!valve 2. Replace ASME safety valve
R. Pressure switch contacts welded
3. Replace pressure sw=tch
Pressure switch continuously Malfunctioning check valve Replace the check varve if the unloader valve bleeds off constantly
blows air out the unloader valve
Pressure switch unloader valve Malfunctioning unloader valve on pressure switch Replace the pressure switch if the unit does not hiss for a short per od
does not release air when the of time when the unit shuts off
unit shuts off
Interstage safety valve pops off I. Head gasket or the gasket in the valve plate 1. Replace valve plate and gaskets
while the unit is running assembly blown
2. Valve not seating roperly
sa_r°Ftety valve 2. Replace valve plate and gaskets 3. Malfunctioning
3. Replace safety valve
Interstage safety valve pops off Malfunctioning tank check valve Replace the check valve
after the unit shuts off