b. Disassembly. Refer to figure 11 and disassemble
(4) Inspect the support for cracks and signs of
the water pump.
extensive wear. Replace an unserviceable
46. Water Pump Assembly Cleaning, lnspection, and
(5) Replace the water pump seal, slinger, and
gaskets upon reassembly.
(1) Clean all parts with an approved cleaning
solvent and dry thoroughly.
(2) Remove all rust, corrosion, and rough spots
on mounting surfaces.
(1) Assemble items (22, 21, 20, and 19, fig.11)
on the shaft (18) and insert the shaft into
the support (8). Secure with retaining ring
b. Inspection and Repair.
(1) Inspect the water pump body, cover, and
(2) Install items (16, 15 and 14) in the impeller
pipe elbow for cracks, breaks,' and other
(13) and install the impeller on the shaft
damage. Replace defective parts.
(2) Inspect the impeller for cracked, chipped, or
broken blades. Replace a damaged or
b. Installation. Install the water pump (TM 53820-
(3) Inspect the shaft assembly for nicks, burrs,
rough spots, and wear.
damaged or worn shaft assembly.
Section IV. GENERATOR ASSEMBLY
with an approved cleaning solvent and dry
The generator is a 4-pole, shunt-wound, 24 volt unit
with sealed bearings in both the drive end frame and the
(2) Clean the commutator with No.
commutator end frame. The generator serves a dual
sandpaper and blow away the particles with
purpose; supplying electrical energy for lights and
low pressure compressed air.
accessories, and recharging the batteries by furnishing
current to make up for cranking and other power losses
(3) Clean the field windings and armature with
from the batteries while the generator is not in operation.
a clean lint-free cloth dampened with an
The armature rotates between the field coils and produces
approved cleaning solvent.
voltage. The generator is cooled by a fan mounted on the
drive pulley and has clockwise rotation.
b. Inspection and Repair.
49. Generator Assembly Removal and Disassembly
(1) Replace the brushes if they are oil soaked,
cracked, or worn to one-half inch in length.
a. Removal. Remove the generator (TM 58820-206-
(2) With the brush arms and the brush springs
installed, test for proper spring tension of 28
ounces. Replace the springs if the tension
is less than 28 ounces.
50. Generator Assembly Cleaning, Inspection, and
(3) Inspect the armature windings to see if they
are properly pressed in the core slots and
tightly soldered to the commutator risers.
(4) Inspect the commutator for rough spots,
(1) Clean all metal parts with the exception of
discoloration, pitting, scoring, and high
ball bearings, field windings, and armature,
mica. If the commutator is
AGO 8456A 33