TM 3-1040-263-34
g.
Unscrew and remove relief valve (17, fig. 4-
(3) If necessary, rotate the adjustment
4).
plug slightly so that a new lockwire can be inserted
through the lockvwire hole in the body and a slot in the
plug.
4-10.
Test and Calibration
(4) Secure lockwire.
a. Test and calibrate the relief valve as
described in TB 742-93-1.
4-11.
Reassembly
b.
Adjust the relief valve as follows:
Reassembly is the reverse of disassembly (para 4-9),
except for the following procedures:
(1) Remove lockwire.
a. Without coating the first two starting
(2) With an input air pressure of 800 psi to
threads, apply a thin film of sealing compound to the
the relief valve, rotate the adjustment plug until the valve
remaining pipe threads.
operates. Then, back of the adjustment plug until the
valve is inoperative.
b.
Refer to paragraph 1-4b for correct torque.
Section IV. FIRST-, SECOND-, AND THIRD-STAGE HEAT EXCHANGERS,
AFTERCOOLER, AND AFTERCOOLER BRACKET
4-12.
General
correct position and aline heat exchanger nuts with
elbow (1. fig. 4-6) and elbow (2, fig. 4-10).
General support maintenance personnel are authorized
to replace the first-, second-, and third-stage heat
(2) Fingertighten heat exchanger nuts
before Wrench-tightening to avoid stripping threads.
exchangers, aftercooler, afttercooler bracket, elbow, and
attaching hardware.
(3) Tighten nuts (39.6 to 62.4 pound-
inches).
4-13.
First-Stage Heat Exchanger
(4) Locate loop clamp positions (fig. 3-3)
a.
Disassembly.
and attach clamp (3) to compressor, using screw (2) and
nut (1).
(1) Remove canvas cover (TMI 3--1040-
26312).
(5) Replace protecting cage (para 3-7).
(2) Remove protecting cage (para 3-7).
(3) Locate loop clamp (fig 3-3) securing
(6) Replace canvas cover (TM 3-1040-
first stage heat exchanger.
26312).
(4) Unscrew and remove nut (1) and
screw (2) securing each clamp (3) to compressor.
4-.14.
Second-Stage Heat Exchanger
a.
Disassembly.
CAUTION
(1) Perform the procedures of paragraph
Tape openings on compressor to
4-9 a through f.
prevent entry of foreign matter.
(2) Remove loop clamps from defective
heat exchanger.
(5) Disconnect
first.-stage
heat
exchanger from elbows.
b.
Cleaning and Inspection.
(6) Remove loop clamps from defective
first-stage heat exchanger.
(1) Clean heat exchanger with drycleaning
b. Cleaning and Inspection.
solvent.
(1) Clean heat exchanger with drycleaning
solvent.
(2) Inspect end nuts for defective threads.
(3) Inspect heat exchanger for bent fins, distortion, and
(2) Inspect end nuts for defective threads.
damage.
(3) Inspect heat exchanger for bent fins,
distortion, and damage.
c. Reassembly. Reassembly is the reverse of
disassembly (a above).
c.
Reassembly.
4-15.
Third-Stage Heat Exchanger
(1) Place first-stage heat exchanger in
a.
Disassembly.
4-6