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Air brake adjustment
WARNING:Failure to maintain proper air brake adjustment can
result in reduction or loss of braking ability.
Air brake inspection and adjustment or repairs should be performed by a
qualified service technician in accordance with the instructions in the
service manual.
Cam brakes - automatic slack adjusters
Inspect standard air brakes equipped with automatic slack adjusters for
proper brake adjustment as listed in the maintenance schedule charts.
However, more frequent inspection is required if your vehicle’s brakes
are subjected to heavy use or adverse operating conditions such as:
•Frequent brake applications while fully loaded.
•Operation on hilly or mountainous terrain.
•Frequent operation on dirt, gravel or mud.
Some aftermarket brake linings also require more frequent inspections.
WARNING:Do not manually adjust the automatic slack
adjusters to correct excessive push rod stroke as it may result in
reduced brake effectiveness and a vehicle crash. Excessive push rod
stroke indicates that a problem exists with the automatic adjuster, with
the installation of the adjuster, or with foundation brake components
that manual adjustment does not remedy. Seek service from a qualified
facility for excessive push rod stroke.
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Maintenance intervals
ON-HIGHWAY - 60,000 MILES (96,000 KM) OR MORE ANNUALLY
(Miles, kilometers or months - whichever occurs first)
Miles (x 1,000) 15 30 45 60 75 90 105 120 135 150
Kilometers (x 1,000) 24 48 72 96 120 144 168 192 216 240
Months 3 6 9 12 15 18 21 24 27 30
Engine
Engine oil and filter - change (diesel engine) Refer to manufacturer’s recommendation
Engine oil and filter - change (gasoline engine) Every 7,500 miles (12,000 km) or 6 months
Engine coolant - check level••••••••••
Engine coolant - check freeze-protection and additive
strength (corrosion inhibitor) (diesel engine)••••••••••
Extended life engine coolant - add extender (diesel
engine)Refer to manufacturer’s recommendation
Extended life engine coolant - replace (diesel engine) Refer to manufacturer’s recommendation
Engine coolant - replace (gasoline engine) Initial change at 6 years or 100,000 miles (160,000 km)
(whichever occurs first); every 3 years or 50,000 miles
(80,000 km) thereafter
Engine air filter - inspect (gasoline engine)••••••••••
Engine air filter - replace (gasoline engine)•••••
Replace spark plugs••
Inspect accessory drive belt(s) Inspect at 100,000 miles (160,000 km) and 120,000 miles
(192,000 km); replace at 150,000 (240,000 km) miles if not
replaced in the last 100,000 miles (160,000 km)
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ON-HIGHWAY - 60,000 MILES (96,000 KM) OR MORE ANNUALLY (Continued)
(Miles, kilometers or months - whichever occurs first)
Miles (x 1,000) 15 30 45 60 75 90 105 120 135 150
Kilometers (x 1,000) 24 48 72 96 120 144 168 192 216 240
Months 3 6 9 12 15 18 21 24 27 30
Non-driving front axle
Drag link - lubricate••••••••••
Kingpin and bushing - lubricate••••••••••
Tie rod ends - lubricate••••••••••
Wheel bearing - grease type - repack•••••
Wheel bearing - oil type - change oil•
Wheel bearing - oil type - check level••••••••••
Brake system - air
S-cam - lubricate••••••••••
Slack adjusters - lubricate••
Brake system - hydraulic
Master cylinder - check level••••••••••
Parking brake relay lever/linkage - lubricate••
Steering
Power steering filter - replacement Every 5 years or 500,000 miles (800,000 km)
Power steering fluid - change•
Power steering fluid - check level••••••••••
Steering column U-joints/slip joint - lubricate••••••••••
Steering gear Ross TAS - output shaft - lubricate•••
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ON-HIGHWAY - 60,000 MILES (96,000 KM) OR MORE ANNUALLY (Continued)
(Miles, kilometers or months - whichever occurs first)
Miles (x 1,000) 15 30 45 60 75 90 105 120 135 150
Kilometers (x 1,000) 24 48 72 96 120 144 168 192 216 240
Months 3 6 9 12 15 18 21 24 27 30
Driveshaft
U-joint - lubricate (SPL) Every 100,000 miles (160,000 km) or 6 months
U-joint and slip joint - lubricate (non-SPL) Every 10,000–15,000 miles (16,000–24,000 km) or 3 months
Clutch
Release bearing/shafts/forks - lubricate••••••••••
Transmission
Automatic and Auto-shift Refer to transmission operator’s manual
Eaton-Fuller manual - petroleum oil - change••
Eaton-Fuller manual - synthetic oil - change At 500,000 miles (800,000 km) if factory-filled with synthetic
At 250,000 miles (400,000 km) if converted to synthetic
Non-Eaton-Fuller manual - check level••••••••••
Rear axle
Eaton/Dana/Spicer - check level••••••••••
Eaton/Dana/Spicer - petroleum oil - change••
Eaton/Dana/Spicer - synthetic oil - change At 500,000 miles (800,000 km) if factory-filled with synthetic
At 250,000 miles (400,000 km) or 3 years if converted to
synthetic
Meritor - check level Every 25,000 miles (40,000 km) or fleet maintenance interval
Meritor - filter change Every 100,000 miles (160,000 km)
Meritor - petroleum oil - change Every 100,000 miles (160,000 km) or annually
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ON-HIGHWAY - 60,000 MILES (96,000 KM) OR MORE ANNUALLY (Continued)
(Miles, kilometers or months - whichever occurs first)
Miles (x 1,000) 15 30 45 60 75 90 105 120 135 150
Kilometers (x 1,000) 24 48 72 96 120 144 168 192 216 240
Months 3 6 9 12 15 18 21 24 27 30
Meritor - synthetic oil - change Linehaul: Every 500,000 miles (800,000 km) or 4 years
Intercity coach: Every 250,000 miles (400,000 km) or 4 years
Cab components
Door hinges/latches/strikers - lubricate, check link••
Door lock cylinders - lubricate••
Seat adjuster slides - lubricate••
Diesel exhaust fluid (DEF) system
Check and refill DEF system••••••••••
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ON-HIGHWAY - 60,000 MILES (96,000 KM) OR MORE ANNUALLY
(Miles, kilometers or months - whichever occurs first)
Miles (x 1,000) 165 180 195 210 225 240 255 270 285 300
Kilometers (x 1,000) 264 288 312 336 360 384 408 432 456 480
Months 33 36 39 42 45 48 51 54 57 60
Engine
Engine oil and filter - change (diesel engine) Refer to manufacturer’s recommendation
Engine oil and filter - change (gasoline engine) Every 7,500 miles (12,000 km) or 6 months
Engine coolant - check level••••••••••
Engine coolant - check freeze-protection and additive
strength (corrosion inhibitor) (diesel engine)••••••••••
Extended life engine coolant - add extender (diesel
engine)Refer to manufacturer’s recommendation
Extended life engine coolant - replace (diesel engine) Refer to manufacturer’s recommendation
Engine coolant - replace (gasoline engine) Initial change at 6 years or 100,000 miles (160,000 km)
(whichever occurs first); every 3 years or 50,000 miles
(80,000 km) thereafter
Engine air filter - inspect (gasoline engine)••••••••••
Engine air filter - replace (gasoline engine)•••••
Replace spark plugs•••
Inspect accessory drive belt(s) Inspect at 100,000 miles (160,000 km) and 120,000 miles
(192,000 km); replace at 150,000 (240,000 km) miles if not
replaced in the last 100,000 miles (160,000 km)
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ON-HIGHWAY - 60,000 MILES (96,000 KM) OR MORE ANNUALLY (Continued)
(Miles, kilometers or months - whichever occurs first)
Miles (x 1,000) 165 180 195 210 225 240 255 270 285 300
Kilometers (x 1,000) 264 288 312 336 360 384 408 432 456 480
Months 33 36 39 42 45 48 51 54 57 60
Non-driving front axle
Drag link - lubricate••••••••••
Kingpin and bushing - lubricate••••••••••
Tie rod ends - lubricate••••••••••
Wheel bearing - grease type - repack•••••
Wheel bearing - oil type - change oil••
Wheel bearing - oil type - check level••••••••••
Brake system - air
S-cam - lubricate••••••••••
Slack adjusters - lubricate•••
Brake system - hydraulic
Master cylinder - check level••••••••••
Parking brake relay level/linkage - lubricate••
Steering
Power steering filter - replacement 5 years or 500,000 miles (800,000 km)
Power steering fluid - change••
Power steering fluid - check level••••••••••
Steering column U-joints/slip joint - lubricate••••••••••
Steering gear Ross TAS - output seal - lubricate•••
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ON-HIGHWAY - 60,000 MILES (96,000 KM) OR MORE ANNUALLY (Continued)
(Miles, kilometers or months - whichever occurs first)
Miles (x 1,000) 165 180 195 210 225 240 255 270 285 300
Kilometers (x 1,000) 264 288 312 336 360 384 408 432 456 480
Months 33 36 39 42 45 48 51 54 57 60
Driveshaft
U-joint - lubricate (SPL) Every 100,000 miles (160,000 km) or 6 months
U-joint and slip joint - lubricate (non-SPL) Every 10,000–15,000 miles (16,000–24,000 km) or 3 months
Clutch
Release bearing/shafts/fork - lubricate••••••••••
Transmission
Automatic and Auto-shift Refer to transmission operator’s manual
Eaton-Fuller manual - petroleum oil - change•••
Eaton-Fuller manual - synthetic oil - change Factory fill w/synthetic at 500,000 miles (800,000 km);
Converted to synthetic at 250,000 miles (400,000 km)
Non-Eaton-Fuller manual - check level••••••••••
Rear axle
Eaton/Dana/Spicer - check level••••••••••
Eaton/Dana/Spicer - petroleum oil - change•••
Eaton/Dana/Spicer - synthetic oil - change At 500,000 miles (800,000 km) if factory-filled with synthetic
At 250,000 miles (400,000 km) or 3 years if converted to
synthetic
Meritor - check level Every 25,000 miles (40,000 km), or fleet maintenance interval
Meritor - filter change Every 100,000 miles (160,000 km)
Meritor - petroleum oil - change Every 100,000 miles (160,000 km) or annually
Scheduled Maintenance Guide
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