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TM 5-2420-222-20-3
HYDRAULIC EARTH DRILL BORING HEAD - CONTINUED
TM 5-2420-222-20-3
ACTION
LOCATION
ITEM
REMARKS
WARNING
Some parts are heavy. Be careful when handling them. Lifting equipment is
needed when parts weigh over 50 pounds (23 kg) for a single person lift, over 100
pounds (45 kg) for a two person lift, and over 150 pounds (68 kg) for a three or
more person lift. Do not try to handle heavy parts without lifting equipment. Keep
clear of heavy parts supported only by lifting equipment. Failure to observe this
precaution could cause serious injury or death of personnel.
1.
Hydraulic earth
Hydraulic earth
With aid of assistant, using 500-pound
drill auger (1)
drill boring head
capacity lifting equipment, position
(2) and assembled
with drain plug (3) at lowest point.
parts
NOTE
Steps 2 thru 4 will drain the hydraulic earth drill boring head chain case.
2.
Chain housing (4)
Fill plug (5) and
a.
Using 1 1/8-inch, 1/2-inch drive socket
gasket (6)
and ratchet handle, unscrew and take out.
b.
Get rid of gasket (6).
2-1871
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