IMPORTANT: After performing all operations listed in
this table, perform all daily, weekly, and monthly
maintenance operations listed in the "Pretrip and

Post-Trip Inspections and Maintenance" chapter of
the Business Class® M2 Driver’s Manual.

M1 Maintenance Operations

Maintenance

Operation No.

Title of Maintenance Operation

00-12

Lubrication and Fluid Level Check

• Eaton Fuller Clutch Release Bearing Lubricating
• Eaton Fuller Clutch Release Cross-Shaft Lubricating
• Clutch Hydraulic Fluid Level Checking
• Transmission Fluid Level Checking
• Fifth Wheel Lubricating
• Trailer Electrical Connector Lubricating
• Suspension Lubricating
• Kingpin Lubricating
• Tie Rod End Lubricating
• Axle Lubricant Level Checking
• Driveline Lubricating
• Haldex and Gunite Slack Adjuster Lubricating
• Meritor Slack Adjuster Lubricating
• Power Steering Fluid Level Inspecting
• Power Steering Gear Lubricating
• Drag Link Lubricating
• Door Seals Lubricating
• Hood Rear Support Lubrication

25-05

Clutch Adjusting, Manually Adjusted Clutches

26-03

Allison and Eaton Fuller Transmission Breather Checking

31-02

Fifth Wheel Inspecting

32-01

Suspension Inspecting

33-04

Tie Rod End Inspecting

33-05

Wheel End Inspection and Maintenance, 6,000-Pound and 8,000-
Pound Steer Axles with Oil-Lubricated Hubs

35-02

Axle Breather Checking

40-02

Tire Check

41-01

Driveline Inspecting

42-01

Air Brake System Valve Inspection

42-02

Bendix Air Dryer Desiccant Replacement (with an oil-coalescing des-
iccant cartridge)

†

42-04

Bosch Hydraulic Brake System Inspection

General Information

M1 Maintenance Operations: 00–07

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M1 Maintenance Operations

Maintenance

Operation No.

Title of Maintenance Operation

42-09

Brake Lines and Fittings Inspection, Hydraulic Brakes

42-13

Brake Inspection

42-14

Hydro-Max

™

Brake System Inspection

42-15

WABCO System Saver Air Dryer Desiccant Cartridge Replacement

†

42-16

Versajust Slack Adjuster Inspection and Lubrication

‡

47-03

LNG Fuel System Inspecting

47-06

CNG High-Pressure Fuel Filter Element

49-02

CAT CGI Bellows and Piping Inspection

60-02

Aerodynamic Component Inspection

83-01

Air Conditioner Inspecting

Schedule III vehicles only.

†

If equipped with an oil-coalescing desiccant cartridge, replace the cartridge once a year, regardless of mileage.

Otherwise use the M5 maintenance interval.

‡

Complete this procedure every 25,000 miles (40 225 km), 3 months, or 500 operating hours, whichever comes

first.

M1 maintenance interval should be used as a general guideline; the actual frequency of filter element replace-

ment will vary depending on cleanliness of the fuel station system.

Table 6, M1 Maintenance Operations

General Information

M1 Maintenance Operations: 00–07

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NOTE: The M2 Maintenance Operations include the
maintenance operations in

Table 7

and all of the

maintenance operations in

Table 6

, M1 Maintenance

Operations.

M2 Maintenance Operations

Maintenance

Operation No.

Title of Maintenance Operation

00-07

Perform All M1 Maintenance Operations

00-13

Lubrication and Fluid Level Check

• Eaton Fuller Transmission Fluid Changing and Magnetic Plug

Cleaning

• Meritor Camshaft Bracket Lubricating

13-01

Air Compressor Inspection

20-01

Radiator Cap Inspecting

20-03

Fan Drive Inspecting (Noise Emission Control)

26-04

Eaton Fuller Transmission Air Filter/Regulator Element Cleaning

33-05

Wheel End Inspection and Maintenance, 6,000-Pound and 8,000-
Pound Steer Axles with Oil-Lubricated Hubs

†

42-08

Air Dryer AD–9, AD–IP, and AD–IS/DRM Check

42-10

Brake Pedal Linkage and Mounting Plate Inspection

47-05

CNG Fuel System Inspecting

47-07

CNG Fuel Cylinder Inspecting

‡

49-01

Exhaust System Inspecting (Noise Emission Control)

Petroleum-based lubricants only.

†

Schedule II vehicles only.

‡

The fuel cylinder should be inspected every year or 100,000 miles (160 900 km), whichever comes first.

Table 7, M2 Maintenance Operations

General Information

M2 Maintenance Operations: 00–08

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