Fan Guard Bracket

TM 5-4310-340-24

(18) Secure third stage cooler clamp, at relief valve

(18) Turn aftercooler 90 counterclockwise and

end of cooler, to aftercooler clamp with screw (1, fig C-5) nut

raise rear of aftercooler to clear relief valve (8, fig C-4) and

(3),and two washers (2).

union (3, fig C-6).

(19) Loosen tube (38, fig C-3) end nut at elbow

NOTE

(39) (if tightened during disassembly) and position bracket

Note position of aftercooler to facilitate

(36) to clamps (29). Secure clamps to bracket with screws

installation during assembly.

(31), washers (30). and nuts (28).

(20) Install four fan guard bracket screws (23, fig

(19)

Remove aftercooler from compressor.

C-3). lockwashers (24). and flat washers (25).

(20)

Remove three cushion clamps from after

(21) Tighten all screws. clamps and tube end nuts

cooler.

installed in steps (13) through (20) above. See paragraph 1-5

b. Installation.

for torques.

(1) Position

aftercooler

over

third

stage

(22) Install fan (para 3-6).

cylinder.

(23) Install first stage air inlet fitting (1. fig C6)}.

NOTE

See a (18) above for positioning of aftercooler.

3-15. Fan Guard Bracket

(2) Install three cushion clamps on aftercooler as

a. Removal (fig C-3).

shown in figure C-5.

(1) Remove fan guard (para 3-5).

(3) Loosely connect aftercooler end nut to

(2) Remove cooler clamp screws (3), nuts (6),

restrictor fitting (9, fig C-5).

and washers (4) from bracket to be removed.

(4) Secure clamp (4) to bracket (12) with screw

(3) Remove screw (23), lockwasher (24), and flat

(1). nut (3), and two washers (2).

washer (25). Remove bracket from compressor.

(5) Tighten aftercooler end nut at restrictor fitting

(9. fig C-5) to 135-150 lb-in.

b. Installation.

(6) Install elbow (1 fig C-3) and tighten securely.

(1) Position bracket on compressor and install

(7) Position relief valve clamp bracket (10, fig C-

screw (23). lockwasher (24). and flat washer (25). Do not

3) between cylinder head fins and install head screw (14. fig

tighten screw (23).

C-8) and washer (13). Tighten screw to 30-40 lb-in.

(2) Position fan guard on brackets. Aline bracket

(8) Position relief valve tube (8. fig C-5) on

screw holes between fan guard parallel traverse bars. Tighten

restrictor fitting (9) and loosely connect end nut.

screw (23) installed in step (1) above to 40-45 lb-in.

(9) Position cushion clamp (11) on relief valve (7).

(3) Position cooler clamp (5) on coolers and

Secure clamp (11) and clamp (4) to bracket (10) with screw

secure with two screws (3). nuts (6). and four flat washers

(11). nut (3) and two washers (2).

14).

(10) Tighten relief valve tube end nut at restrictor

(4) Install fan guard (para 3-5)..

fitting to 135-150 lb-in.

(11) Secure cushion clamp (4) to bracket (12) with

3-16. Third Stage Relief Valve

screw (1) nut (3) and two washers (2).

a. Removal.

(12) Position coolers. aftercooler tube. and fan

(1) Disconnect third stage cooler end nut from

guard brackets (assembled) on compressor.

relief valve (27. fig C-3).

(2) Disconnect aftercooler tube end nut from

NOTE

elbow (11. fig C-6).

Do not tighten any nuts or &.screws until all

(3) Remove screws (10). lockwashers (9). and

cooler end nuts and fan guard bracket .screws

flat washers (8) securing bracket (7) to fourth stage head.

are installed. (13) Connect aftercooler tube (10.

Remove bracket (7) and two spacers (4) from head.

fig C-4) to union (5. fig C-5) and elbow (11. fig C-

(4) Unscrew relief valve from head.

6).

(14) Connect third stage cooler (2. fig C-3) to relief

b. Installation.

valve (27) and elbow (1).

NOTE

(15) Connect second stage cooler (3. fig C-4) to

Apply teflon tape per MIL-I-27730 to relief valve

relief valve (8) and elbow (9).

threads prior to installation.

(16) Connect first stage cooler (1) to elbows (2).

(1) Install relief valve into fourth stage cylinder

(17) Secure second stage cooler clamp (at relief

inlet port and tighten. Valve must be alined with third stage

valve end of cooler) to aftercooler clamp with screw (6) nut

cooler tube.

(7), and two washers (5).

(2) Connect third stage cooler tube end nut to

relief valve and tighten to 135-150 lb-in.

3-5