ARMY TM 9-6115-464-34
AIR FORCE TO 35C2-3-445-2
NAVY NAVFAC P-8-624-34
d. Assembly. Assemble the fuel burning heater assembly in reverse order of disassembly procedures while
observing the following:
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
Exercise care in replacing quartz rod (13, figure 5-3) as it is easily broken if dropped. After
installation, gently move rod up and down to make sure it moves freely in its stainless steel tube.
Also make sure at least 1/32 inch extends out of tube when rod is resting on bottom.
Assemble motor assembly (67), combustion air inlet (64), inlet plate (62) and combustion fan (61)
before installing burner assembly.
Make sure lead wire from motor assembly is on side of blower opposite nameplate (74) before
drawing it through casing grommet (39).
Make sure all wire leads are connected to their respective terminals as tagged during disassembly.
NOTE
Coolant pump cannot be assembled completely and installed as a separate unit. It
must be assembled as it is installed on short shaft end of motor. Test motor and pump
(paragraph e.(3) before completing heater assembly.
Install seal spring (58) and seal washer (57) over end of motor shaft. Place o-ring (55) in seal cage
(56), then install seal cage over end of motor shaft with seal face facing forward.
Install adapter (54) over motor shaft and align holes with tapped holes in motor.
Install pump rotor (52) on motor shaft and temporarily tighten rotor setscrew (50). Place o-ring (53)
in groove of adapter (54). Place cam ring in position aligning scribe mark. With motor shaft end play
taken up in direction of pump, make certain there is at least 0.002–inch clearance between outer
face of cam ring and rotor. Move rotor back and forth as necessary to produce this clearance, then
tighten setscrew.
NOTE
Make sure that adapter and cam ring are tightly compressed together when deter-
mining 0.002 inch clearance, otherwise a false reading will be obtained.
Install pump vane (51) in rotor slots making sure that grooves in vanes face toward the direction of
rotation. Pump rotates counterclockwise when viewing end of port plate (47).
Place o-ring (48) in groove of port plate (47), then position plate against cam ring (49). Align scribe
marks and secure with four setscrews (46).
Test heater assembly. Plug threaded ports with caps if pump is not to be assembled in heater
immediately.
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