6-14. AIR COMPRESSOR GROUP (See Figure 8-11).
The following paragraphs contain disassembly, cleaning,
inspection, repair or replacement and assembly
instructions for the air compressor group.
Disassembly. Disassemble the air compressor
group only to the extent necessary to repair or replace a
defective part or parts.
Tube/hose assembly. Refer to paragraph
6-4. Remove tube/hose assemblies as
needed. Tag to identify for reassembly
Do not use a chain around cylinder heads to lift
air compressor assembly.
Remove hose clamp (1, Figure 8-11)
and breather hose (2).
Using a lifting sling and hoist, or other
suitable equipment, support air
compressor group and remove eight
nuts, lock washers, and screws (18, 19,
and 20, Figure 8-18) attaching
compressor to clutch. Remove two
screws (3), lock washers (4) and mount
washers (5) attaching compressor (28)
Block up rear end of engine assembly to
support engine when air compressor
assembly is removed.
Using hoist and lifting sling, back
compressor (28) away from clutch until
drive ring gear (76, Figure 8-12) is free
of clutch driving plate (50, Figure 8-18).
For ease of disassembly, move
compressor group to a work bench or
equivalent and remove hoist and lifting
Unscrew and remove nut (8, Figure 8-
11) and screw (9) with lockwasher (10)
attaching each compressor mounting
bracket (11) to frame. Remove brackets
(11) from frame.
Separate and remove shock mounts (6)
from compressor mounts (11).
Remove screw (13) and washer (14),
fan hub washer (12), and nuts (17),
washers (18), and screws (19) from fan
(15) and hub (16). Remove fan (15) and
key (20) from compressor (28).
Remove elbow (21) from first stage
cylinder head and elbow (22) from
second stage cylinder head.
Remove one elbow (23) from second
stage cylinder head, two elbows (23, 24)
from third stage cylinder, and two elbows
(24) from fourth stage cylinder head.
(10) Remove hose clip (25) and hose (27).
Remove hose clamp (25) and PVC valve
(26) from breather hose (27).
Cleaning. Refer to paragraph 6-3.a for general
Clean all unpainted metal parts using P-
D-680, Type II or equivalent. Wipe non-
metallic parts with a clean, lint-free cloth
moistened in detergent and water. Air
Clean outside and inside surfaces of
steel tubing with compressed air,
pressurized hot water and detergent or
Clean exterior of hoses in soap and
water. Wipe dry.
Inspection. Refer to paragraph 6-3.b for general
Repair or Replacement. Refer to paragraph 6-
3.c for general repair instructions.
Assembly. To assemble the air compressor
group, proceed as follows:
Assemble PVC valve (26) to breather
hose (27) with clamp (25). Install
breather hose (27) with clamp (25).
Install elbows (24) in fourth stage
cylinder head, elbows (23, 24) in third
stage cylinder and elbow (23) in
second stage cylinder.
Install elbow (22) in second stage
cylinder head and elbow (21)
stage cylinder head.