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TM 5-2420-222-20-3
HYDRAULIC EARTH DRILL BORING HEAD - CONTINUED
ACTION
LOCATION
ITEM
REMARKS
DRAINING - CONTINUED
3.
Chain case (1)
Drain plug (2)
a.
Place 10-gallon container underneath.
b.
Using 3/16-inch socket-head screw
key, unscrew and take out.
c.
Drain hydraulic fluid into 10-gallon
container.
d.
Screw in and tighten using 3/16-inch
socket-head screw key.
e.
Get rid of drained fluid (page 2-137).
4.
New gasket (3) and
Screw in and tighten using 1 1/8-inch,
fill plug (4)
1/2-inch drive socket and ratchet handle.
NOTE
Steps 5 thru 8 drain hydraulic earth drill boring head gear case.
5.
Hydraulic earth
Hydraulic earth
With aid of assistant, using 500-pound
drill auger (5)
drill boring head
capacity lifting equipment, position
(6) and assembled
with drain plug (7) at lowest point.
parts
6.
Gear case (8)
Fill plug (9) and
a.
Using 1 1/8-inch open-end wrench,
gasket (10)
unscrew and take out.
b.
Get rid of gasket (10).
7.
Drain plug (7)
a.
Place 10-gallon container underneath.
b.
Using 5/16-inch socket-head screw
key, unscrew and take out.
c.
Drain hydraulic fluid into 10-gallon
container.
d.
Screw in and tighten using 5/16-inch
socket-head screw key.
e.
Get rid of drained fluid (page 2-137).
8.
Fill plug (9) and
Screw in and tighten using 1 1/8-inch
new gasket (10)
open-end wrench.
9.
Hydraulic earth
Hydraulic earth
a.
Using 500-pound capacity lifting
drill auger (5)
drill boring head
equipment, set down.
(6) and assembled
b.
Take off 500-pound capacity lifting
parts
equipment.
2-1872
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