Maintenance
5-8
750-204
Profire D/LND
5.11.3 — Primary Air Pump or Compressor
The air compressor itself requires little maintenance, however, its life is dependent upon sufficient clean, cool
lubricating oil. The oil level in the air-oil tank must be checked regularly. Lack of oil will damage the compressor.
Disassembly or field repairs to the air compressor are not recommended. Check the air-oil tank sight glass for
proper oil level. The level should be kept at the midpoint of the sight glass. The compressor rotor must turn
freely. All tube connections must be air tight.
Alignment of the compressor and motor sheaves and proper belt tension are important.
Belt tension is adjusted according to the displacement of the belt with thumb pressure. The displacement should
be 3/8” to 1/2”.
To adjust, loosen the two bolts on the compressor mounting flange and the three setscrews which hold the com-
pressor in place.
The mounting flange is slotted at the top, which permits belt tightening. If the slot in the mounting flange is
insufficient for obtaining proper belt tension, the modular base has two extra holes for this purpose.
Move the top bolt to the next hole and adjust. Tighten bolts and setscrews. Replace the belt guards. If the belt
becomes frayed or cracked, replace it.
5.11.4 — Air Cleaner
Never operate the compressor without the air cleaner in place. The cleaner should be cleaned at regular inter-
vals. The correct oil level must be maintained in the air cleaner. Use the same oil used for air compressor lubri-
cation.
5.11.5 — Air-Oil Tank
Check the lube oil level in the air-oil tank. Inspect oil level regularly as loss of oil will damage the compressor.
Change oil every 2000 hours of operation. The air-oil tank should be drained once a year and thoroughly
flushed. Remove the mist eliminator pads from the upper section of the tank, wash thoroughly in kerosene and
dry. Refill with non detergent SAE30 oil to a level midway up the sight glass. For normal environment use SAE30
oil. For a 32 º F and below environment, use SAE 10 oil.
5.11.6 — Oil Level Sight Gauge
The oil level sight gauge can be cleaned by removing it from the air-oil tank and soaking it in a detergent solu-
tion. If cleaning the gauge proves unsatisfactory, replace it.
5.11.7 — Compressor Oil Filter (Lube Oil Strainer)
The lube oil strainer prevents foreign materials from entering the compressor. The strainer screen must be
cleaned at regular intervals. The screen is easily removed for cleaning by unscrewing the bottom plug. Immerse
in solvent and thoroughly clean.
Do not attempt field repair of the compressor. Installation of a new compressor is mandatory. Send the old compres-
sor in for repair or exchange (where allowed).
!
Caution
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