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TM 5-2420-222-20-3
HYDRAULIC EARTH DRILL HOSES AND FITTINGS - CONTINUED
ACTION
LOCATION
ITEM
REMARKS
INSTALLATION
NOTE
Loader backhoes with Serial Numbers 235786 thru 235999 have bushings. Loader
backhoes with Serial Numbers 319995 thru 342573 have straight adapters.
20.
Two bushings (1)
Two new packings (3)
Put on.
or straight
adapters (2)
21.
Elbow (4)
New packing (5)
Put on.
22.
Boring head (6)
Elbow (4)
a.
Unplug boring head (6).
with assembled
b.
Screw in and tighten to position noted
packing (5)
during removal using 718-inch open-
end wrench.
23.
Elbow (4)
Straight adapter (7)
Screw in and tighten using 11/16-inch,
1/2-inch drive socket and ratchet handle.
24.
Straight adapter (7)
Hose (8)
a.
Take off tag.
b.
Screw in and tighten using 9/16-inch
and 11/16-inch open-end wrenches.
NOTE
Steps 25 and 26 only apply to loader backhoes with Serial Numbers 319995 thru
342573.
25.
Boring head (6)
Two straight
a.
Unplug boring head (6).
adapters (2)
b.
Screw in and tighten using 1 1/4-inch,
with assembled
1/2-inch drive socket and ratchet
packings (3)
handle.
26.
Two straight
Two hoses
a.
Take off tag.
adapters (2)
(9 and 10)
b.
Screw in and tighten using 7/8-inch
and 1-inch open-end wrenches.
NOTE
Steps 27 and 28 only apply to loader backhoes with Serial Numbers
235786 thru 235999.
27.
Boring head (6)
Two bushings (1)
a.
Unplug boring head (6).
with assembled
b.
Screw in and tighten using 1/2-inch
packings (3)
drive socket and ratchet handle.
2-1860
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