TM 5-4310-343-35
k. Basic Compressor
(32), are to be removed from the
(1) Refer to paragraph 5-6a. and remove fan.
motor frame (31).
(2) Refer to paragraph 5-6b. and remove
intercoolers, aftercollers, tube assemblies, and fittings.
c.
Remove
four
screws
(82)
and
(3) Refer to paragraph 5-6f. and remove 2nd
lockwashers (89) and four side covers (51) to expose the
stage Relief Valve.
four brush holder assemblies (34).
(4) Refer to paragraph 5-6g. and remove oil
pump.
d Disconnect brush leads. Lift bush spring (42) on
(5) Refer to paragraph 5-6h. and remove oil
each brush holder (35) and remove brush (43).
sump.
(6) Refer to paragraph 5-6j. and remove
e. Remove four nuts (111) and lockwashers (110)
motor from basic compressor (159).
and remove end cover (56) and four spacers (55).
l. Cleaning
Remove elastic stop nut (54) from motor shaft. Loosen
Clean disassembled items with cleaning solvent
set screw on hub of fan (53) and pull fan off of motor
Federal specification P-D-680 to facilitate handling and
shaft.
inspection for damage.
m. Inspection
f. Make a score mark on bearing bracket (47) and
Do not attempt to inspect any item for wear,
motor frame (31) to insure correct position when
defects, and damage without having cleaned it first.
reassembled.
Remove four locknuts (112) and
n. Installation
lockwashers (109) from studs (52) and carefully pry
After item has been inspected and checked for
loose bearing bracket (47) from motor frame (31).
satisfactory performance, install the item in the reverse
order of removal or proceed with overhaul as required.
g. Carefully pry loose bearing bracket (50) and pull
Be sure that all washers, seals, thread tape, and clamps,
bearing bracket away from motor frame (31). The
etc are used wherever they are required.
complete armature assembly (33) should slip out with
the bearing bracket. Be careful when removing the
5-6.1. Separation of Motor and Compressor (Bogue
armature assembly to prevent scratching the wound
Electric Model 6703) (Fig. 6-11)
armature against the stator pole pieces.
To separate the compressor assembly from the motor
h. Separate the armature assembly. (33) from the
assembly, disconnect the pipe coupling at the sensing
bearing bracket (50). It should pull apart easily. Use a
port and inlet port located on the moisture separator.
suitable bearing puller and remove bearing (45 and 48)
Remove four nuts (116), lockwashers (115), and screws
from the motor shaft
(113) from motor-compressor coupling flange and
carefully pry apart motor and compressor units (30 and
i If necessary to remove the field coils carefully
2).
tag all leads before unsoldering connections to insure
exact reconnections. The series connected field coils
5-6.2. Disassembly of DC Motor (Bogue Electric Model
are removed by removing four countersunk screws (99)
6703)
on each of the four main field poles.
j.
When disassembling the brush holder
parts referenced in the following disassembly procedure.
assembly (34), remember the two negative (-) brush
holders which are grounded, are positioned at the top
b. Remove control components and associated
and bottom of the motor assembly. The two positive (+)
mounting brackets of components mounted on motor
brush holders are identical to the negative brush holders
frame such as moisture separator (5), back pressure
except insulating bushings (37) and nylon washers (38)
valve (10), pressure switch (12), filter box (14), timer
are used in place of spacers (39 and 36), respectively.
assembly (17), and interconnecting tubing.
NOTE
NOTE
When reassembled, the positive
Removal of above components are
brush holders must be positioned
only necessary if the field coils,
one on each side of the motor
located on the main pole assembly
assembly
to
enable
proper
connection of field leads.
5-12
