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 969 of 1275

TM 9-2350-311 -20-1

10-21 FINAL DRIVE SPROCKETS AND HUBS —

CONTINUED

b. Installation

WARNING

Hub is very heavy. At least two personnel are required to install.

T-154 sprockets must be used with T-154 track and T-136 sprockets must be used

with T-136 track.

1 Place inner sprocket (7) on sprocket hub (5) and install 10 screws (9) and 10 nuts (8), locking sprocket to hub.

Torque screws to 80-100 Ib-ft (108-136 NŽm).

2 Place hub on final drive assembly (6) and install eight screws (1), holding hub to final drive assembly. Lubricate

screws and torque to 330-360 Ib-ft (447488 NŽm).

3 Place outer sprocket (4) on hub and install 10 screws (3) and 10 nuts (2). Torque nuts to 80-100Ib-ft(109-136

NŽm)

o

NOTE

FOLLOW-ON MAINTENANCE:

Connect track (para 10-6 or 10-7)

10-52

CAUTION