HYDRAULIC SYSTEM -624880175

TM 5-2420-222-20-1

ORGANIZATIONAL TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

HYDRAULIC SYSTEM

CAUTION

When Serial Number ranges are given, be sure to use proper parts for replacement. Although parts for

both configurations may appear to be interchangeable, they may function differently. Use of wrong parts

could cause equipment failure and serious damage.

1. HYDRAULIC SYSTEM DOES NOT WORK

Step 1. Remove and inspect hydraulic oil filter (page 2-1698) and pump stroke control valve filter element (page 2-

1196).

a. If filter elements are not dirty, damaged, or clogged, install hydraulic oil filter (page 2-1698) and

pump stroke control valve filter element (page 2-1196) and go to step 2.

b. If hydraulic oil filter element is dirty, damaged, or clogged, replace (page 2-1698).

c. If pump stroke control valve filter element is damaged or clogged, replace (page 2-1196).

d. If pump stroke control valve filter element is dirty, clean and install (page 2-1196).

Step 2. Check hydraulic pump-to-pressure control valve oil line (1) for sharp bends, dents, or kinks.

a. If hydraulic pump-to-pressure control valve oil line (1) has sharp bend, dent, or kink, replace

(page 2-1375).

b. If hydraulic pump-to-pressure control valve oil line (1) does not have sharp bend, dent, or kink,

go to step 3.

Step 3. Check pressure control valve adjustment (page 2-1200).

a. If pressure control valve is not properly adjusted, adjust (page 2-1200).

b. If pressure control valve cannot be adjusted, replace (page 2-1200).

c. If pressure control valve is properly adjusted, notify Direct Support Maintenance.

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