TM 5-4310-375-14
(2) Assemble cap gasket (12), lower aftercooler cap (11) and four screws (10) onto aftercooler (8).
(3) Place o-ring gasket (9) in groove provided and install aftercooler (8) onto cylinder head with two screws (7).
Connect air discharge piping to aftercooler (8) air outlet (see para 4-30).
(4) Assemble cap gasket (6), intercooler cap (5) and six screws (4) onto intercooler (2).
(5) Place two o-ring gaskets (3) in grooves provided and install intercooler (2) onto cylinder head attaching with
three screws (1). Turn main power on at source.
5-9.
Cylinder, pistons, and connecting rods. Refer to para 3-11 and remove air intake filter. Refer to para 4-14 and
remove belt guard. Refer to para 4-18 and remove air compressor from unit. Place air compressor on a work bench. Refer
to para 4-19, 4-20, and 4-21 and remove cylinder head and valves, intercooler and aftercooler, and flywheel respectively.
Maintenance of cylinder, pistons, and connecting rods is as follows:
a. Removal/Disassembly. Remove and disassemble to extent necessary in following sequence.
(1) Unscrew and remove six cylinder bolts (1, fig 5-4) and washers (2). Tap cylinder (3) lightly on mounting
flange to break seal with compressor frame and carefully lift off cylinder (3). Remove gasket (4).
(2) Use a piston ring expander and remove the three-ring first stage ring set (5). Remove the two piston pin
retaining clips (6), slide out piston pin (7) and remove the first stage piston (8).
(3) To remove first stage connecting rod assembly (9), rotate crankshaft to position where connecting rod cap
nuts (10) can be reached. Remove the two nuts (10), lockwashers (11) and bolts (12). Carefully separate
rod cap (13) from rod (14).
CAUTION
Mark connecting rod cap (13) and rod (14) in a manner to indicate cap position
on rod so that at reassembly the cap is assembled in same relationship as when
removed.
(4) Only when necessary, remove oil splash rod (15) from cap (13) and press bushing (16) from rod (14). Re-
move the connecting rod bearing halves (17).
(5) Use a piston ring expander and remove the four-ring second stage ring set (18). Remove the two piston
pin retaining clips (19), slide out piston pin (20) and remove second stage piston (21).
(6) To remove second stage connecting rod assembly (22), rotate crankshaft to position where connecting rod cap
nuts (23) can be reached. Remove the two nuts (23), lockwashers (24) and bolts (25). Carefully separate
rod cap (26) from rod (27).
CAUTION
Mark connecting rod cap (26) and rod (27) in a manner to indicate cap position
on rod so that at reassembly the cap is assembled in same relationship as when
removed.
(7) Only when necessary, remove oil splash rod (28) from cap (26) and press bushing (29) from rod (27). Remove
the connecting rod bearing halves (30).
5-12
