User Manual

Table Of Contents
Every 15,000 mi / 24,000 km / 12 mo
20
Drive Axle (Meritor) - Input shaft and pinion shaft
Check and adjust the endplay. (Refer to Drive Axle - Meritor on page 263.)
Drive Axle (Meritor) - Axle shaft
Tighten the rear axle flange nuts to the specified torque value. (Refer to Drive Axle - Meritor on page 263.)
Drive Axle (Meritor) - Interaxle differential
Check the operation. (Refer to Inter-Axle Differential Lock Operation on page 148 for maintenance instructions.)
Rear Suspension - U-bolts
Check the torque. Tighten to specified torque value as required. (Refer to Suspension U-Bolts, Grade 8 on page 282.)
Rear Suspension - Frame and crossmember bolts
Check the torque. Tighten to specified torque value as required. (Refer to Frame Fastener Torque Requirements on page 280.)
Rear Suspension - Mounting brackets and fasteners
Check the condition and the fastener torque. Tighten to the specified torque value as required. (Refer to Frame Fastener Torque
Requirements on page 280.)
Drum Brakes (All) - Brake camshaft bearing
Check for excessive camshaft play in the axial and radial directions. Max allowable play is 0.003 in. Lubricate (NLGI #2 grease).
(Refer to Drum Brake Inspection on page 214.)
Drum Brakes (All) - Brake treadle valve
Clean the area around the treadle, boot, and mounting plate. Check the pivot and mounting plate for integrity. Check the plunger
boot for cracks. Lubricate roller pin, pivot pin, and plunger (NLGI #2 grease). (Refer to Drum Brake Inspection on page 214.)
20
Ensure that all maintenance intervals leading up to this point are repeated during this interval prior to the completion of
MAINTENANCE - Preventive Maintenance Intervals
those listed here.
Y53-6113-1A1 (11/20) 189
5