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TM 10-3930-638-24&P
3-31. MAST ASSEMBLY MAINTENANCE (cont)
c. Inner and Outer Mast (cont).
STEP
LOCATION
ITEM
ACTION
REMARKS
INSPECTION/REPAIR
5
Inner mast (3) outer
mast (12), and hose
channels (16, 17, and
6
Roller bearings (4 and
1 o)
7
Roll pins (6 and 19)
8
Spring retainer
lock pin (9)
9
Spring (8)
10
All other parts
INSTALLATION/REPLACEMENT
11
12
Outer mast
a.
(12)
b.
c.
d.
e.
Inner mast (3) a.
b.
c.
d.
e.
f.
g.
7) and
Three roll pins (19)
Three hose channels
(18, 17 and 16)
Three cap screws
(15), six washers
(14) and three
nuts (13)
Shims (11)
Two roller bearings
(10)
Lock pin (9)
Spring (8)
Spring retainer (7)
Roll pin (6)
Shims (5)
Two roller bear-
ings (4)
Chain hoist
Inspect
18)
Inspect
Inspect
Inspect
Inspect
Inspect
Install
Position
Install
Position
Position
Position
Position
Position
Install
Install
Install
Attach
Replace or repair by welding if cracked,
broken, or structurally damaged. Replace
if twisted or bent out of shape and if
roller bearing posts are out of round or
worn
Replace if out of round (inside and outside
diameters), worn, or damaged
Replace if bent
Replace if damaged, bent or worn
Replace if damaged, distorted, or perma-
nent set is noticed
Replace if damaged, worn, or threads
damaged
On roller bearing posts
On roller bearing posts
To approximate center of inner mast
3-262
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