TM 5-3810-307-24-1-2
FLANGE
(REF.)
IMPACT
BLOCK
(REF.)
2
3
1
LEGEND
1.
Direct Drive Assembly
3.
Lower Cylinder
2.
Lower Cylinder to Direct Drive Assembly
Bolts, 3/4-10 NC x 3 LG SHCS
Figure K-17. Direct Drive Assembly Installation
Direct Drive System Cushion Rings, Cushion Compression Ring, and Cushion Shim Ring. (Refer to
Figures K-15 and K-18.)
The cushion rings, cushion compression ring, and cushion shim ring (if installed) are normally removed
to inspect for wear and/or replacement.
Removal.
a.
Remove the blow count recorder from the direct drive assembly (Page K-37).
b.
Remove the two lower gibs from the direct drive assembly (Page K-39).
c.
Loosen, but not remove, the twelve upper to lower drive housing bolts (2, Figure K-15)
and the ten cushion housing retaining plate bolts (1, Figure K-18) on the upper drive
housing (3, Figure K-15) of the direct drive assembly.
d.
Remove the direct drive assembly as an assembly from the lower cylinder (Page K-44).
e.
With the direct drive assembly standing upright, remove the twelve upper to lower drive
housing bolts (2) securing the lower drive housing (1) to the upper drive housing (3).
f.
Secure and support the upper drive housing (3) using a sling or chains attached to the
lifting lugs.
g.
Hoist and remove the upper drive housing (3) as an assembly (cushion housing, cushion
housing retaining plate, cushion rings, and cushion compression ring) from the lower
drive housing (1). Set upper drive housing (3) upright with the cushion housing retaining
plate (3, Figure K-18) resting on wood blocks.
Change-1 K-45
