Operating Instructions
Maintenance
(Continued)
deflection with normal thumb pressure.
Also, align belts using a straight edge
against the face of the flywheel and
touching the rim on both sides of the
face. The belts should be parallel to this
straight edge (See Figure 5). Ensure that
the edge of the belt on both the motor
pulley and flywheel are the same dis-
tance from the straight edge. Slots in the
base plate make it easy to slide the motor
back and forth to adjust belt tension.
Troubleshooting Chart
Symptom
Motor hums and runs
slowly or not at all
Reset mechanism cuts
out repeatedly or fuses
blow repeatedly
Excessive noise in opera-
tion
Milky oil in oil reservoir
Excessive oil consump-
tion or oil in air lines
Water in discharge air
Air blowing out of inlet
Insufficient pressure
Operation
Check Safety Valve
Drain Tank (See Fig. 3)
Check Oil Level (See Fig. 2)
Check Air Filter
Check Intercooler
Clean Unit Components
Check Belt Tightness
Change Oil (See Fig. 2)
STORAGE
If compressor is to be stored for a short
period of time, make sure that it is stored
Possible Cause(s)
1. Low voltage or no voltage
2. Shorted or open motor winding
3. Defective check valve or unloader
valve
4. Defective pressure switch - contacts
will not close
1. Pressure switch set too high
2. Faulty check valve, air bleeds
3. Wrong fuse size or magnetic starter
heaters
4. Defective motor
1. Loose pulley, flywheel, belt, belt
guard, etc
2. Lack of oil in crankcase
3. Compressor floor mounting loose
Water condensing in crankcase due to
high humidity
1. Restricted air intake
2. Wrong oil viscosity
3. Worn piston rings
4. Oil leaks
5. Scored cylinder
Excessive water in tank
Broken first stage inlet valve
1. Air demand too high
2. Leaks or restrictions in hoses or piping
3. Slipping belts
MAINTENANCE SCHEDULE
Daily
in a normal position and in a cool pro-
tected area.
Corrective Action
1. Check with voltmeter, check overload relay in mag-
netic 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 replace pressure switch
1. Adjust or replace
2. Clean or replace faulty valve
3. Be sure that fuses and heaters are rated properly
4. Replace motor
1. Tighten
2. Check for damage to bearings, replenish oil
3. Shim and tighten
Pipe air intake to less humid air source. Run pump con-
tinuously for one hour
1. Clean or replace air filter
2. Drain oil. Refill with oil of proper viscosity
3. Replace rings
4. Tighten bolts, replace gaskets or o- rings
5. Replace cylinder
Drain tank
Replace valve assembly
1. Limit air usage
2. Check for leaks or restriction in hose or piping
3. Tighten belts
5
Weekly
Monthly
3 Months