TM 9-4940-568-34
3-18
3-6. TURNTABLE BEARING INSPECTION PROCEDURE (CONT).
4
2
1
3
5
7
6
(1)
Position magnetic protractor (1) on boom (2), ensure magnetic protractor is in line with axial centerline
of boom.
(2)
With the boom angle level, rotate boom (2) and position boom nose (3) towards the rear of the FRS (4).
(3)
Keeping boom (1) level, lower mast (5) until approximately 1 in. (24.4 mm) clearance is present between
the mast erection cylinders (6) and shelter (7).
