(5) Set control switch (8) to ON-HI.
q. 45 Hydraulic Lubrication Fittings. Six each
(6) Shortly after ignition (30 to 45 seconds)
defective fittings when necessary, are located in the
the press-to-test lamp (10) will light
lower accessory drawer.
indicating the burner is in full operation.
(7) The burner will operate on high-flame until
61. Fire Extinguisher
the thermostat setting is reached. At this
a. Description. The fire extinguisher (14, fig. 6) is
point the heater will cycle to low-flame,
a hand-operated, carbon dioxide type. It is mounted on
until the thermostat again calls for a
a bracket directly behind the engine oil container.
higher heat.
b. Operation. Remove the fire extinguisher from
Note
the mounting bracket and twist out the safety pin. Aim
The heater will cycle from HI to LO
the horn swivel directly at the base of the fire and push
heat constantly when the control
the thumb trigger.
switch is placed on HI. If the control
switch is placed on LO, the heater
c. Refilling and Maintenance. Frequently inspect
the fire extinguisher for full charge, proper working
will burn on low-flame continuously
order, and secure mounting. The amount of charge in
until the heater is turned off.
the carbon dioxide type of extinguisher can be checked
c. Stopping.
only by weighing. Empty and full weights are stamped
(1) Place the heater control switch (8) in the
on the valve head. Refer to TM 5-687 and TM 9-1799
OFF position.
for maintenance and refilling instructions.
(2) The heater will continue to burn and the
press-to-test lamp will remain on until all
62. Heater
gas has been purged from the system.
a. Description. The lubricating unit is equipped
(3) Replace the cap on the exhaust tube
with a gasoline heater (6, fig. 9) designed to maintain
opening (6, fig. 5) on top of the inclosure.
satisfactory engine operating conditions, and to keep the
lubricants in a free-flowing state during cold weather
63. Heat and Exhaust Duct Controls
operation. The heater control panel (7, fig. 2) is
a. Heat Duct Controls.
mounted on the heater slide tray directly to the left of
(1) Engine heat air damper control (17, fig.
the heater, and to the right of the air compressor.
6), located on the heater duct, engine side
Operation of the heater is controlled by an automatic
of the unit, directs heated fresh air to the
thermostat (4, fig. 9) and a heat control switch (8).
engine.
b. Operation.
(2) Lubricant container hot air damper (16)
(1) Remove the cap from the heater exhaust
located on the lower part of the heater
tube (6, fig. 5).
duct, engine side of unit, directs heater
(2) Swing the engine hot air damper control
fresh air to the battery drawer (15, fig.
(17, fig. 6) to the left into open position,
and the lubricant container hot air damper
(3) The heater duct (12, fig. 6) located
(16) down into the closed position. Heater
directly above the engine generator
output will be directed toward the engine,
directs heated fresh air to the engine (5,
and the battery compartment.
(3) Press the press-to-test lamp (10, fig. 9).
b. Exhaust Duct Controls.
The lamp will light if power is available at
(1) The exhaust air heater duct (5, fig. 6),
the heater circuit breaker.
located between the muffler and the
(4) Set the thermostat (4) to the desired
engine air cleaner (6) directs heated air
setting. The difference between numbers
directly into the air cleaner, by rotating the
on the dial is 10 degrees.
top of the air cleaner so the screened
opening faces the muffler duct.
By
turning the air cleaner counterclock
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