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ENGINE -680640079
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TM-5-2420-224-20-1 Tractor Wheeled 4x4 DED Small Emplacement Excavator (SEE) and High Mobility Material Handler (HMMH) Manual
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FORKLIFT OR CRANE
TM 5-2420-224-20-1
Table 2-1. Preventive Maintenance Checks and Services (Cont)
NOTE: Within designated interval, these checks are to be performed in the order listed.
INTERVAL DEFINITIONS
Q-Quarterly
S-Semiannually
A-Annually
Interval
Item
Item to be Inspected:
No.
Q
S
A
Procedure: Check for and have repaired, filled, or adjusted as needed.
HYDRAULIC SYSTEM
24
NOTE
Oil filter(s) will be serviced/cleaned/changed when they are known to be
contaminated or clogged; service is recommended by AOAP laboratory analysis;
or at prescribed hard time intervals (page 2-14).
Hydraulic fluid systems must be sampled once a year as prescribed by DA PAM
738-750, Functional Users Guide for the Army Maintenance Management System
(TAMMS).
a. Sample oil for AOAP (DA PAM 738-750).
b. Check hydraulic system components for leaks and damage. Check all hoses for
wear, pinching, or interference. If any of these conditions are found, replace or reposition
hose.  Replacement is mandatory for any hose worn or chafed before vehicle use.
Replacement is mandatory for any hose that is leaking or has bulges.
b.1 Replace front (page 4-709) and rear (page 4-720) hydraulic filters.
c.
Check hydraulic filters for exposed indicator button.
25
FRONT LOADER OR FORKLIFT
a. Start engine. Cycle each control and check for smooth operation of front loader or
forklift.
b. Inspect mounting and attaching hardware for looseness.
c.
Check hoses, cylinders, and valves for leaks.
d. Inspect for weld breaks.
e. Check adjustment of forklift carriage and mast chains (pages 4-559, 4-562).
26
BACKHOE OR CRANE
a. Start engine. Cycle each control and check for smooth operation of backhoe or
crane.
b. Inspect mounting and attaching hardware for looseness.
c.
Check hoses, cylinders, and valves for leaks.
d. Inspect for weld breaks.
e. Inspect backhoe/crane travel lock for proper operation, cracks, corrosion, and
damage.
Change 2

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