14
MG6-OLVERT-3B Rev. 0 12/30/99
Check Valve - Inspection and
Replacement
Remove and inspect the check valve at least once a year or more
often if the compressor is heavily used. Moisture and other
contaminants in the hot compressed air will cause an accumu-
lation of a carbon-like residue on the working parts. If the valve
has heavy carbon build-up, it should be replaced. Use the
following procedure to inspect, clean or replace the check
valve.
1. Turn compressor off and disconnect or lock out power
source.
2. Release air pressure from the air tank.
3. Loosen the top and bottom tube nuts and remove the
outlet tube.
4. Remove pressure release tube.
5. Unscrew the check valve (turn counterclockwise) using
socket wrench.
6. Check that the valve disc moves freely and that the spring
holds the disc in the upper, closed position. The check
valve may be cleaned with a solvent.
7. Apply sealant to the check valve threads. Reinstall the
check valve (turn clockwise). Do not overtighten.
8. Replace the outlet tube and tighten top and bottom nuts.
9. Replace pressure release tube.
Recommended Oil Room or
(API SG/CD Ambient
Heavy Duty)* Temperature
SAE 20 Below 20
o
F
SAE 30 Above 32
o
F
Viscosity Chart
* Oil capacities above are approximations. Always fill to
middle of sight glass. Refer to parts manual for pump
identification.
Oil levels by Pump
ABP-4900 42 oz.
ABP-459 60 oz.
BAL-T16 32 oz.
BAL-T39 40 oz.
SHULTZ 16 oz.
*Fluid Ounces of OilCompressor
Pump
Air Filter - Inspection and Replacement
NOTE
Keep the air filter clean at all times. Do not
operate the compressor with the air filter re-
moved.
A dirty air filter will not allow the compressor to operate at full
capacity. Before you use the compressor, check the air filter to
be sure it is clean.
If it is dirty, replace it with a new filter.
Oil - Checking and Changing
Overfilling with oil will cause premature com-
pressor failure. Do not overfill.
1. Check oil level in compressor crankcase before each use.
The oil level should be to the middle of the oil sight glass.
2. See Routine Maintenance Schedule for oil change
scheduling.
3. Remove the oil fill and drain plugs. Collect the oil in a
suitable container.
4. Replace the oil drain plug and refill the crankcase with
recommended oil.
Note
It is important to maintain the proper oil level. A
low oil level reduces proper cylinder wall lubri-
cation and increases ring wear.
5. Replace the oil fill plug.
6. Start the compressor outfit and run for several minutes.
Shut the compressor down and check the oil level. If
necessary, add more oil.
SERVICE INSTRUCTIONS
Recommended Oil Room or
(API SG/CD Ambient
Heavy Duty)* Temperature
20 Wt. Cold Climates - 10º F
30 Wt. Moderate Climates -
30º to 80º F
40 Wt. Hot Climates - 80º F
For ABP-4900 AND ABP-459
For BAL-T16 AND BAL-T39
Oil Type
A compressor grade non-detergent oil should be used. Most
automotive detergent oils cause excessive carbon buildup
and should not be used. Please note that all units run at a
constant speed (not start and stop) and should be lubricated
by Rarus 847, Shell turbo 100, or Anderol synthetic compres-
sor oil. Do not use synthetic oil for the first 300 hours. All units
should be broken in on petroleum based oil.
* DeVilbiss Brand AC240 can also be used in this com-
pressor.
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