TM 5-3805-280-10
Drifter
maintenance
DRIFTER MAINTENANCE
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N0 mm
1.28 in
6/ m 98
Daily
Every 1000 drilled meters
Dismount the shank adaptor to check the condi-
Lubricate the drifter front part (5 or 6 shots of a
tion of the splines.
hand grease pump).
Replace shank if damaged.
Check the wear of the flushing nozzle bronze bush
Weekly
(or front guide for drifter with reverse percussion).
Check tightening of drifter mounting bolts.
maximum wear = shank diameter+1 mm (.04 in).
Replace the complete flushing nozzle by a reno-
vated one if damaged (or replace the bronze bush for
drifter with reverse percussion).
19-12
