lief valve (fig. 7-4) is located on the hose reel
the lube pumps. To operate the master control
side of the compressor and unloads the com-
valve, pull the plunger out to release the air to
pressor when the tank pressure has reached
the lube pumps and push the plunger in to stop
the air.
175 psi, and allows the compressor to resume
when the pressure has dropped to 145 psi.
y. Pressure Relief Valve. The pressure re-
Section IV. OPERATION OF EQUIPMENT
Note. Engine rpm under load should be 8200
2-10. General
rpm. See TM 5-2805-203-14 for engine rpm adjusting
a. The instructions in this section are
instructions.
published for the information and guidance of
(9) Push in choke control after engine
the personnel responsible for operation of the
starts.
lubricating and servicing unit.
c. Manual Starting of Engine.
b. The operator must know how to perform
(1) Perform (1) through (4) as pre-
every operation of which the lubricating and
viously stated. Have another person perform
servicing unit is capable. This section gives
(2) through (4) below.
instructions on starting and stopping the
(2) Wind the starting rope in a clock-
lubricating and servicing unit, and on coor-
wise direction around the engine flywheel
dinating the basic motions to perform the
sheave leaving about 6 inches free at the
specific tasks for which the equipment is de-
handle end.
signed. Simce nearly every job presents a
different problem, the operator may have to
(3) Give a fast strong steady pull the full
vary given procedures to fit the individual
length of the rope. If the engine does not start
job.
at the first attempt, increase choking and crank
again.
c. The engine is operated at a speed of 3,200
rpm, under load.
(4) After the engine starts, gradually
push in the choke control until the engine rune
2-11. Starting
smoothly, increase throttle, if necessary, and
release bypass switch.
a. Preparation for Starting. Perform the
necessary daily preventive maintenance serv-
2-12. Stopping
ices "paragraph 3-6.
a. Normal Stopping.
b. Electric Starting of Engine.
(1) Close the throttle (15, fig. 2-3).
(1) Push the engine exhaust diverter
(2) Close the master air valve (50).
handle (22, fig. 2-3) into position to direct the
engine exhaust gases to the atmosphere outside
(3) Open the air tank drain valve (44).
the unit.
(4) Place the ignition switch to OFF.
(2) Pull out the choke control (10).
(5) Perform the necessary daily pre-
(3) Open the throttle (15) about inch.
ventive maintenance services, (para 3-6).
(4) Place the ignition switch (16) to
b. Emergency Stopping. Turn the ignition
ON and depress and hold down the bypass
switch (16) to OFF position.
switch (11).
(5) Push start switch (14).
(6) When engine starts, release start
switch (14).
graph 2-11.
(7) When oil pressure gage (13) exceeds
20 psig, release the bypass switch (11).
(8) Throttle (15) should be pulled all the
through 2-17 for complete information on
way out for normal operation.
operation of the lubricating and servicing unit.
