ALL BACKHOE CYLINDERS DO NOT WORK

TM 5-2420-222-20-1

ORGANIZATIONAL TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

22. BOTH BACKHOE CYLINDERS DO NOT WORK

Go to Hydraulic System Malfunction 23: All Backhoe Cylinders Do Not Work, below.

23. ALL BACKHOE CYLINDERS DO NOT WORK

Check backhoe control valve-to-jaw control (direct linear) valve or manifold oil lines (1 and 2) or (3 and 4) for

sharp bends, dents, or kinks.

a. If backhoe control valve-to-jaw control (direct linear) valve or manifold oil lines (1 and 2) or (3 and

4) aren not bent, dented, or kinked, replace backhoe control valve (page 2-1260).

b. If backhoe control valve-to-jaw direct linear valve oil line (1) on loader backhoes with Serial

Numbers 319995 thru 342573 has sharp bend, dent, or kink, replace (page 2-1412).

c. If jaw direct linear valve-to-backhoe control valve oil line (2) on loader backhoes with Serial

Numbers 319995 thru 342573 has sharp bend, dent, or kink, replace (page 2-1436).

d. If backhoe control valve-to-manifold oil line (3 or 4) on loader backhoes with Serial Numbers

235786 thru 235999 has sharp bend, dent, or kink, replace (page 2-1429).

24. ALL BACKHOE CYLINDERS, JAW CYLINDER, AND HYDRAULIC IMPACTOR (IF ATTACHED) DO NOT WORK

Check pressure control valve-to-jaw direct linear valve or manifold oil line (5 or 6) and jaw direct linear valve or

manifold-to-hydraulic oil filter relief valve oil line (7 or 8) for sharp bends, dents, or kinks.

a. If pressure control valve-to-jaw direct linear valve oil line (5) on loader backhoes with Serial

Numbers 319995 thru 342573 has sharp bend, dent, or kink, replace (page 2-1405).

b. If pressure control valve-to-manifold oil line (6) on loader backhoes with Serial Numbers 235786

thru 235999 has sharp bend, dent, or kink, replace (page 2-1400).

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