TM 5-4310-275-14
(3) Replace a defective fan.
(2) Inspect for damaged threads, cracks, and
missing fins.
c. Installation.
(3) Straighten bent fins.
(1) Place the fan (7, fig. 7-1) on the end of the
(4) Replace a damaged aftercooler assembly.
crankshaft.
(2) Install bolt (5) and nut (6).
c. Installation.
(1) Attach the aftercooler assembly (18, fig.
(3) Install the aftercooler assembly.
7-1) to the fan guard (1) with shims (24), six
clamps (2), and twelve screws (4, fig. 7-1) and
a. Removal. Disconnect the intercooler
lockwashers (3).
assemblies at the applicable cylinder ports (fig. 7-
(2) Attach the fan guard to the compressor
1).
endbell with six screws (20) and lockwashers (19).
WARNING
(3) Connect the aftercooler assembly to the
Dry cleaning solvent, Fed. Spec. P-D-680
third stage cylinder and the separator and filter
or P-S-661, used to clean parts is
.
air line.
potentially dangerous to personnel and
7-3. Fan Assembly
property. Avoid repeated and prolonged
a. Removal.
skin contact. Do not use near open flame
(1) Remove the aftercooler assembly.
or excessive heat. Flash point of solvent
(2) Remove nut (6, fig. 7-1) and bolt (5). Pull
is 100 F. (38 C.) -- 138 F. (59 C.).
the fan (7) off the crankshaft.
b. Cleaning and Inspection.
(1) Clean the exterior surfaces with dry
WARNING
cleaning solvent, Fed. Spec. P-D-680. Clean
Dry cleaning solvent, Fed. Spec. P-D-680
residue from the fins with compressed air.
or P-S-661, used to clean parts is
(2) Inspect for cracks, damaged threads and
potentially dangerous to personnel and
missing fins.
property. Avoid repeated and prolonged
(3) Straighten bent fins.
skin contact. Do not use near open flame
(4) Replace all seals and gaskets and
or excessive heat. Flash point of solvent
effective parts.
is 100 F. (38 C.) -- 138 F. (59 C.).
c. Installation. Connect the intercooler
b. Cleaning and Inspection.
assemblies to the applicable cylinder ports (fig. 7-
(1) Clean the fan with dry cleaning solvent,
1).
Fed. Spec. P-D-680.
(2) Inspect the fan for bent or cracked
blades.
Section Il. AIR COMPRESSOR
7-5. Air Compressor
a. The air compressor assembly consists of
a. Removal.
three cylinder and piston assemblies mounted
(1) Disconnect the intercooler assembly (fig.
radially on a crankcase and pneumatically con-
7-1).
nected in series. The pistons are attached to, and
(2) Remove the attaching screws (1, fig. 7-
actuated by, a master connecting rod mounted on
2), lockwashers (2) and lift intake cover (3) and
a crankshaft which extends axially through the
filter (5) from cylinder head (9). Remove and
crankcase. One end of the shaft couples directly to
discard gaskets (4).
the engine crankshaft, and the opposite end
(3) Remove flat head screws (8) and lift first
extends through the crankcase endbell and
stage cylinder head (9), gaskets (17), and com-
mounts a multiple blade fan which blows cooling
plete valve mechanism (items 6 through 18, less
air past the cylinders and intercooler and aft-
items 8 and 17) free of the first stage cylinder.
(4) Remove valve retainer screw (18), nut
ercooler assemblies.
b. Many repair parts for air compressor
(6), and flatwasher (7), and separate intake valve
spring (16), intake valve (15), valve plate (14),
overhaul are provided in kits. Replace all parts
exhaust valve (13), exhaust valve spring (12),
removed in disassembly, regardless of condition,
valve stop (11, fig. 7-2), and packing (10) from the
with all like parts furnished in the kits. See TM 5-
first stage cylinder head.
4310-275-24P for a listing of the kits.
