TM 3-1040-263-34
screws (3) not used to position the bracket. Tighten
(6) Unscrew end nuts and remove
screws (3) in criss-cross pattern to a torque of 40 pound-
second-stage heat exchanger, third-stage heat
inches.
exchanger, and aftercooler with attached hardware (fig.
(25) Position
first-stage
exchanger,
brackets (7 fig. 4-6) and bracket (5, fig. 4-10), and
NOTE
washer (6).
(26) Connect first-stage heat exchanger
The third-stage cylinder and plunger
end nuts to first-stage OUT elbow and second-stage IN
assembly (23) are matched parts. Do
elbow (fig. 3-3).
not separate them.
(28) Assemble washer (4, fig. 4-10) and
screw (3).
(1) Remove elbow (1, fig. 4-12).
(29) Assemble fan group (para 4--7).
(2) Remove second-stage relief valve (2).
testing (e below).
(30) Perform
(3) Unscrew screws (3), and remove
(31) Assemble
protecting cage (para 3-
lockwashers (4) and head (17) with assembled parts.
-7).
(4) Unscrew lockscrew (7), and remove
0 to 2, 000 psi tank-fill
(32.) Per form
valve stop (8) and shims (9, 10 and 11) from the head.
operation ('TM 3-1040-263-12).
(5) Extract spring (12) from head (17).
e. Testing.
Then, using a 5.'16-inch diameter by 2-inch long nylon or
(1) Disconnect aftercooler end nut from
hardwood rod, press the valve plate (14) from the head
water separator elbow (19, fig. 3-1).
(17), exerting pressure on the outlet valve (13) (figure 4-
(2) Using the
crankcase removal
13).
instructions (para 4-32a), remove compressor from
(6) Remove outlet valve (13) from the
engine.
valve plate (J4).
(3) Perform one-hour break-in run (para
(7) Remove the plate seal (15) and plate
4-39) or four-hour break-in run (para 4-41).
gasket (16) from the head (17).
f.
Installation.
(8) Remove the inlet valve (18), inlet
(1) Using the crankcase installation
spring (19), and head gasket (20) from the cylinder and
instructions (para -4-36), install compressor on engine
plunger assembly (25).
e.
(9) Remove the cylinder and plunger
(2) Connect end nut on aftercooler (8, fig
assembly (25) with assembled parts from the
3-1) to water separator elbow (19).
compressor.
(10) Remove the preformed packing (21)
4-29. Third stage
a. Preliminary.
and shims (22, 23 and 21) from the cylinder and plunger
assembly.
(1) Remove canvas group (TM 3--1040
c. Cleaning and Inspection..
263-12).
(1) Using a stiff-bristle brush and
(2) Remove protecting cage (para 3-7).
drycleaning solvent, remove carbon deposits in the third-
(3) Remove fan group (para 4-5).
stage head (17, fig. 4-12). outlet valve (13), inlet valve
(4) Remove studs (4, fig. 4-6), nuts (2),
(18), inlet spring (19), outlet spring (12), third-stage
washers (3), and holding brackets (5, 6 and 7).
valve plate (14), and valve stop (8).
(5) Remove screws (3, fig. 4-12).
(2) Clean remaining metal parts in
washers (4), and holding brackets
(5 and 6).
drycleaning solvent.
(4) after
Replace screws (3) and washers
(3) Apply compressor lubricating oil to
removing brackets (5 and 6).
cleaned parts to prevent rust.
(4) Inspect all parts for wear and damage.
(5) Inspect all threads for damage.
d. Reassembly.
4-20