TM 5-4310-375-14
Maintenance procedures are presented in the order listed below, as applicable. Complete
4-13. Maintenance procedures.
instructions for maintenance operations within the scope of organizational maintenance for each Functional Group is pro-
vided in step-by-step procedures in following paragraphs.
Maintenance Operations (as applicable):
Alignment
Servicing
Painting
Ground handling
Lubrication
Operational check
Reassembly
Inspection-installed items
Test procedures
Removal
Installation
Disassembly
Adjustment
Cleaning
Radio interference suppression
Inspection-acceptance/
Placing in service
rejection criteria
Testing
Repair or replacement
4-14. Belt guard, drive belts, and drive pulley. Maintenance of belt guard, drive belts, and drive pulley is as follows:
a. Removal/Disassembly. Turn main power off at the source. Remove and disassemble belt guard, drive belts, and drive
pulley in following sequence.
(1) Unscrew and remove cylinder head bolt (1, fig 4-2) and washer (2) attaching brace (4) to compressor cylinder
head. As necessary, remove two screws (3) and remove the brace (4).
(2) Remove four screws (5) and lift off belt guard (6).
(3) Only when necessary for repair or replacement, remove four nuts (7) and screws (8) and lift off belt guard
base (9). Remove two locknuts (10), screws (11) and brackets (12).
(4) Loosen attaching hardware securing motor assembly to air receiver saddle and move the motor toward com-
pressor enough to loosen drive belts (13). Remove the two drive belts (13).
(5) When removal of drive pulley is necessary, loosen two setscrews (14) in hub of pulley (15), use a suitable
puller and pull drive pulley (15) off of motor shaft.
b. Reassembly/Installation. Reassemble and install drive pulley, drive belts, and belt guard in following sequence.
(1) Make certain the two setscrews (14, fig 4-2) are unscrewed far enough to allow pulley (15) to be installed on
motor shaft. Install drive pulley on motor shaft with pulley hub toward motor to a point where hub is
approximately 1-3/16 inches (30.163 mm) from motor end frame. Secure the pulley (15) to motor shaft by
tightening the two setscrews (14), one onto shaft; the other onto shaft key.
(2) Install two drive belts (13) onto drive pulley (15) and compressor flywheel pulley grooves. Move motor
assembly away from air compressor aligning pulleys and adjusting belt tension as shown in fig 2-3.
(3) If removed from air receiver saddle, install the two brackets (12) and secure with two each screws (11) and
locknuts (10).
(4) Install belt guard base (9) on brackets (12) and secure with four screws (8) and nuts (7).
(5) Place belt guard (6) over pulleys into position on base (9) and install four screws (S).
(6) If removed, install brace (4) and attach to belt guard with two screws (3). Attach brace (4) to compressor
cylinder head with washer (2) and bolt (1). Torque bolt (1) to 30-33 ft-lbs (4.1 - 4.6 kgs-m). Turn main power on
at source.
4-9
