TM-9-2350-311-20-1
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5
TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS
AUGUST 1994
TM-9-2350-311-20-1 - Page 961 of 1275
TM 9-2350-311 -20-1
10-17 IDLER ARM ASSEMBLIES — CONTINUED
b.
c.
Disassembly — Continued
2 Remove inner sleeve bearing (9), bearing spacer (10), outer sleeve bearing (1 1), idler arm retainer (1 2), and
preformed packing (1 3). Discard packing.
3 Remove eight screws (14), inner sleeve bearing (1 5), outer sleeve bearing (16), preformed packing (17), two
retainers (18), retainer (19), spindle (20), seal (21 ), and plug (22) from idler arm (23). Discard packing, seal,
and plug.
Assembly
1 Remove grease fitting (24) to release air from housing (25).
2 Install new plug (22), new seal (21), spindle (20), retainer (19), two retainers (18), new preformed packing (17),
outer sleeve bearing (16), inner sleeve bearing (15), and eight screws (14) on idler arm (23). Torque screws to
30-40 Ib-ft (41-54 N•m).
3 Install new preformed packing (13), idler arm retainer (1 2), outer sleeve bearing (11 ), bearing spacer (10), and
inner sleeve bearing (9).
4 Install new spring pin (8), idler arm cap (7), flat washer (6), and screw (5). Torque screw to 290-350 Ib-ft (393-
475 NŽm).
5 Pack idler arm (23) and idler arm housing (25) with grease.
10-44
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