TM 9-4310-394-13
2-8. INITIAL ADJUSTMENTS, DAILY CHECKS, AND SELF TESTS. Before the air compressor unit can be operated,
the following daily checks to the unit must be made.
(1) Inspect all air compressor unit for completeness, damage, and for proper operation as applicable. Report
any deficiencies to unit maintenance.
(2) Perform the preventative maintenance checks and services listed in Table 2-1.
(3) (Refer to Figure 2-3). Before operating the air compressor unit, check that the engine oil level is correct by
performing the following steps.
CAUTION
Operating the engine with either too much oil or too little oil can seriously damage the engine. When
checking oil level, be sure the air compressor unit is sitting on a level surface. When filling engine with oil,
be sure that the correct amount has been added to the engine before engine is started.
(a) Remove engine oil dipstick (1) from engine (2).
(b) Wipe all oil from dipstick using a clean cloth (Appendix E, Item 1).
(c) Place dipstick (1) back into engine (2) for a moment.
(d) Remove engine oil dipstick (1) from engine (2) again and check that the oil level is correct as
indicated on the dipstick.
(e) If oil level is low, refer to Lubrication Order LO 9-4310-394-12 and fill engine to the mouth of the
engine filler port with the proper oil.
(f) Replace engine oil dipstick (1) into engine (2).
(4) (Refer to Figure 2-4). Before operating the air compressor unit, check that the air compressor oil level is
correct by performing the following steps.
CAUTION
Operating the air compressor with too little oil can seriously damage the air compressor. When checking
oil level, be sure the air compressor unit is sitting on a level surface. When filling air compressor with oil,
be sure that the correct amount has been added to the compressor crankcase before engine is started.
(a) Check the sight glass (1) on the front of the air compressor crankcase (2) to see if oil level is correct.
Oil level is correct when oil level is located halfway up the sight glass as indicated by the red dot (3).
(b) If oil level is low, refer to Lubrication Order LO 9-4310-394-12 and fill air compressor crankcase with
the proper oil by removing and replacing oil filler (4).
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