TM 9-4940-568-34
3-21
1
10
8
2
3
4
12
(14)
Record measurement.
(15)
If reading is equal to or over .065 in. (1.65 mm), perform bearing replacement procedures. If reading is
under .065 in. (1.65 mm) continue the inspection procedure.
(16)
Rotate the boom (2) 180 degrees to place the boom nose (3) over left side of the FRS (4).
(17)
Lower boom (2) to obtain a level boom angle.
(18)
Position dial indicator (8) with magnetic base on subframe (12). Plunger on dial indicator must be in-line
with the axial centerline of the crane boom (2) with the plunger tip centered as close as possible above
the tip of the swing gear tooth.
(19)
Record measurement.
(20)
Operate boom up control unit (10) until boom angle is reading 60 degrees on magnetic protractor (1).
(21)
Record measurement.
(22)
If reading is equal to or over .065 in. (1.65 mm), replace bearing (Para 3-29). If reading is under .065 in.
(1.65 mm) the inspection procedure is complete, return crane to service.
b.
Follow-On Maintenance:
Stow crane, (TM 9-4940-568-10).
END OF TASK
