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 TM 5-2420-224-20-1
Table 3-5. Troubleshooting (Cont)
Malfunction
Test or Inspection
Corrective Action
HD45 HAMMER DRILL (SEE) (CONT)
109. HAMMER DRILL OVERHEATS.
Check for low oil level in front hydraulic tank.
If oil level is low, add oil (TM 5-2420-224-10).
If oil level is not low, perform Malfunction 100.
110. HAMMER DRILL OPERATES SLOWLY OR INEFFECTIVELY.
Step 1.
Check for damaged hydraulic lines.
If hydraulic lines are damaged, replace hydraulic lines
(page 4-586).
If hydraulic lines are not damaged, go to step 2.
Step 2.
Check for blocked plug (1) by removing hose (2) and plug and checking for
foreign matter.
If plug is blocked, remove foreign matter.
If plug is not blocked, install plug and hose and go to step 3.
Step 3.
Attempt to operate a different hydraulic tool.
If alternate tool operates at normal speed, replace hammer drill.
If alternate tool does not operate at normal speed, notify direct
support maintenance.
Change 2
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