TM 5-3805-298-23-2
0149
Table 1. Boom Will Not Raise or Lower - Continued.
0149
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Boom Will Not Raise or
Test Step 2. Inspect Hydraulic
Lower - Continued
Hoses.
1. Turn battery disconnect switch to
ON position and start engine
(TM 5-3805-298-10).
Main Control Valve Hoses Are Not
2. Visually inspect hoses to the main
Leaking Proceed to step 3.
control valve for Class III leaks
(WP 0173). Check ground for
Main Control Valve Hoses Are
signs of leakage.
Leaking Tighten or replace main
control valve hoses (WP 0173).
Proceed to Test Step 5.
3. Visually inspect bucket lift hoses
Bucket Lift Hoses Are Not Leaking
for Class III leaks (WP 0173).
Proceed to Test Step 3.
Check ground for signs of leakage. Bucket Lift Hoses Are Leaking
Tighten or replace bucket lift hoses
Proceed to Test Step 5.
Test Step 3. Inspect Hydraulic
Cylinders.
Visually inspect bucket lift cylinders for
Bucket Lift Cylinders Are Not
Class III leaks or damage (WP 0384).
Leaking or Damaged Proceed to
Check ground for signs of leakage.
Test Step 4.
Bucket Lift Cylinders Are Leaking
and/or Damaged Replace bucket lift
cylinder(s) that are leaking or damaged
(WP 0384).
Proceed to Test Step 5.
0149-3
