(9) Location. Locate the unit so that it will be as level as possible to assure most efficient lubrication. The
maximum allowable tilt is 15.
(10) Instruments. Check the oil pressure gage and ammeter readings. The oil pressure should be between 15
and 100 psi and the ammeter in the charge range.
(11) Hose (air). Check the condition of the hose and hose connections and blow out any accumulation of dirt
and moisture before attaching an air-operated tool.
d. During-Operation Services. The operator is responsible for correcting or reporting unusual sounds or odors,
deficiencies in performance, or other signs of abnormal operation. He will perform the following specific services:
(1) Instruments. Check all gage and meter readings frequently. At normal operating speeds, temperature, and
load, readings should be as follows:
Engine oil pressure............................. 15 to 100 psi
Coolant temperature........................... 180 to 215 F.
Air receiver pressure .......................... 100 psi (sea level)
Battery-charging ammeter .................. In charge range
(2) Unusual operation. Check for unusual operation such as excessive vibration, brush sparking, overheating,
smoking. Report any irregularity immediately to the proper authority.
(3) Unusual noises. Check for abnormal noises. If any are noticed, stop operation and report to the proper
authority.
e. At-Halt Services. During halts, even if only for short periods, the operator should make a general check of the
equipment and correct or report any deficiencies noticed, in addition to performing the following specific duties.
(1) Fuel. Check fuel supply. Add fuel if necessary.
(2) Oil. Check oil in crankcase. Add oil if necessary.
(3) Coolant. Check coolant level and add if necessary.
Caution: If the engine overheats because of lack of coolant, allow it to cool before filling the
radiator; otherwise there is a danger of cracking the cylinder head and block. If it is necessary to
fill the radiator before the engine has cooled, be sure to fill it very slowly with the engine running
at fast idling speed.
(4) Leaks, general. Check the entire air compressor for leaks, paying particular attention to fuel, oil, cooling
system, and for signs of leaks under the unit.
40