HYDRAULIC SYSTEM -680640080

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.

Procedure: Check for and have repaired, filled, or adjusted as needed.

HYDRAULIC SYSTEM

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.

Check hydraulic filters for exposed indicator button.

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.

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).

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.

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