Every 15,000 mi / 24,000 km / Monthly
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Drive Axle (Meritor City Delivery / OFF HIGHWAY) - Breather
• Check the operation. If the cap doesn't rotate freely, replace. (Refer to Drive Axle - Meritor on page 262 for maintenance
instructions.)
Drum Brakes (All) - Slack Adjusters
• Check the push rod travel and check the control arm for cracks. Adjust at reline. (Refer to Auto Slack Adjuster on page 218 for
maintenance instructions.)
• Lubricate (NLGI #2 grease.)
Drum Brakes (All) - Brake Air System
• Check air lines and fittings for leaks. Adjust routing as required to prevent chafing. Check tank mounting and condition. (Refer to
How to Check the Compressed Air System for Leaks on page 215 for maintenance instructions.)
Hub, Drum, and Hubcap - Hubcaps
• Clean the sight window. Check the center plug, mounting flange, and fill plug for leaks and for proper installation. Replace
broken or damaged parts. Check the lubricant level and add as required. (Refer to Wheels on page 271 for maintenance
instructions.)
Main and Auxiliary Transmission - Main and Auxiliary Transmission and Transfer Case
• Inspect for visible damage, signs of overheating, and leaks. (Refer to Transmission Maintenance on page 272 for maintenance
instructions.)
Auxiliary Transmission - Cotta Transfer Case TR2205 Fabco Transfer Case TC142/TC143/TC170/TC270
• Inspect: Check oil level, inspect for leaks and any visible damage. (Refer to Transmission Maintenance on page 272 for
maintenance instructions.)
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Ensure that all maintenance intervals leading up to this point are repeated during this interval prior to the completion of
those listed here.
MAINTENANCE - Every 15,000 mi / 24,000 km / Monthly
182 Y53-6076-1D1 (09/20)
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