TM 9-4520-251-14
4 - 9 B R A K E.
a.
Lubricate pivot tube at brake mounts(1) on both sides of trailer (2) as required (Item 3, Appendix E).
b. Lubricate plunger (3) as required (Item 3, Appendix E).
4-10 WHEEL BEARINGS.
a.
Remove wheels (1) and hubs
(2).
b. Clean and inspect bearing (3),
and repack with grease at reas-
sembly.
c.
Refer to paragraph 4-68 for
wheel nut adjustment.
d. Clean and repack annually or
as soon as practical after ford-
ing bodies of water, operating in
adverse conditions, or quarterly
in sandy environments. (Item 4,
Appendix E).
Section IV. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
4-11 INTRODUCTION, INSPECTION. AND SERVICE.
a. Systematic, periodic Preventive Maintenance Checks and Services (PMCS) are essential to ensure
that the heater is ready for operation at all times. The purpose of a preventive maintenance program
is to discover and correct defects and deficiencies before they can cause serious damage or com-
plete failure of the equipment. Any effective preventive maintenance program must begin with the
indoctrination of operators to report all unusual conditions noted during daily checks or actual op-
eration to unit maintenance. All defects and deficiencies discovered during maintenance inspec-
tions must be recorded, together with corrective action taken, on DA Form 2404 (Equipment Inspec-
tion and Maintenance Worksheet).
b. A schedule for unit preventive maintenance inspection and service should be established immedi-
ately after installation of the heater.
4-10
