TM 5-3810-306-34
TABLE 3-1. DIRECT AND GENERAL SUPPORT TROUBLESHOOTING (CONTD)
Malfunction
Test or Inspection
Corrective Action
46. BOOM LOWERS SLOWLY
Step 1.
Defective lift cylinder(s).
a. Remove and disassemble lift cylinder(s). (Refer to
b. Repair hydraulic cylinder.
Step 2.
Defective hydraulic pump.
a. Repair or replace hydraulic pump. (Refer to
47. BOOM WILL NOT RAISE
Step 1.
Broken pump shaft.
a. Inspect pump shaft. If OK, do Step 2.
b. Replace pump shaft and seals. (Refer to page 13-12.)
Step 2.
Broken pump drive coupli ng.
a. Inspect drive coupling. If OK, do Step 3.
b. Replace drive coupling. (Refer to page 13-10.)
Step 3.
Defective hydraulic pump section.
a. Repair or replace pump section. (Refer to page 13-12.)
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