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 TM
5-2420-224-34
HAMMER
DRILL
REPAIR
(CONT)
1.
Remove plug (1).
2.
Rotate gage end of test set fully to left to
make sure stem is fully retracted.
Install test set in handle of hammer drill (2)
3.
by rotating chuck end only.
4.
Rotate gage end of test set slowly to right
until pressure is indicated on gage. Pressure
reading should be 500-700 psi (34-48 bar).
5.
Connect nitrogen supply line (3) to charging
valve (4) on test set.
Adjust regulator (5) on nitrogen bottle (6) to
6.
delivery pressure of 600 psi (42 bar).
7.
Open valve (7) on nitrogen supply line (3).
When accumulator is fully charged, close
8.
valve (7) on nitrogen supply line (3) and
disconnect from test set.
Rotate gage end of test set fully to left and
9.
remove tester at chuck end.
10.
Install plug (1).
TESTING
Perform steps 1 thru 4 of Charging, above.
1.
2.
If pressure is low, charge accumulator using
Charging procedure, above.
Rotate gage end of test set fully to left and
3.
remove tester at chuck end.
4.
Install plug (1).
21-14
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