Grizzly T21888 - Manual (Page 20)

model t21888 (mfg. since 2/10) - 18
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5. reinstall the drain plug, and remove the
oil fill cap shown in figure 18.
6. Fill the crankcase with oil until the oil
level is in the center of the sight glass,
then replace the oil fill cap.
changing oil
Change the oil in the air compressor pump
after the initial 50 hours, or 30 days of use;
and every 300 hours, or 3 months after
the first oil change. Use any quality air
compressor oil.
to change the oil:
1. disConnECt thE ComprEssor
From poWEr, And drAin All Air
From thE tAnK.
2. place a container to catch the oil under
the oil sight glass.
check valve
the diaphragm and seal in the check valve
can become damaged, twisted, or dirty
and cause the valve to leak or prevent the
compressor from building air.
to fix the check valve:
1. disConnECt thE ComprEssor
From poWEr, And drAin All Air
From thE tAnK.
2. Using a 19mm wrench remove the cap
shown in figure 19 from the check
valve.
figure 19. Check valve assembly.
Cap
NOTICE
the oil fill cap releases crankcase
pressure through a small hole in
the top of the cap. Keep this hole
unclogged, or the crankcase may
pressurize, causing seals and gas-
kets to leak leading to compressor
bearing failure.
4. tip the compressor to drain all of the oil
from the crankcase.
hot crankcase oil can scald your
hands or fingers. before draining the
oil, allow the compressor to cool 15
minutes before removing the drain
plug.
3. Using a 19mm wrench, remove the
drain plug shown in figure 18.
figure 18. drain plug and oil fill cap.
drain plug
oil Fill Cap
Check Valve Assembly