M4 Maintenance Operations: 00–10

Table 1, M4 Maintenance Operations

M4 Maintenance Operations
Maintenance Operation No.	Title of Maintenance Operation
M1 Maintenance Operations: 00–07	M1 Maintenance Operations: 00–07
M2 Maintenance Operations: 00–08	M2 Maintenance Operations: 00–08
M3 Maintenance Operations: 00–09	M3 Maintenance Operations: 00–09
Engine Support Fastener Checking	Engine Support Fastener Checking
Inspection and Replacement of the Air Cleaner Element	Inspection and Replacement of the Air Cleaner Element
Alternator, Battery, and Starter Checking	Alternator, Battery, and Starter Checking
Radiator Pressure Flushing and Coolant Changing	Radiator Pressure Flushing and Coolant Changing
Hybrid Electric System Coolant Changing	Hybrid Electric System Coolant Changing
Frame Fastener Torque Check	Frame Fastener Torque Check
General Information	General Information
Operational Test	Operational Test
Power Steering Fluid and Filter Change	Power Steering Fluid and Filter Change
Alliance/Racor	Alliance/Racor
Mirror Folding Check	Mirror Folding Check

Table 1, M4 Maintenance Operations

Table 2, M3 Maintenance Operations

M3 Maintenance Operations
Maintenance Operation No.	Title of Maintenance Operation
M1 Maintenance Operations: 00–07	M1 Maintenance Operations: 00–07
M2 Maintenance Operations: 00–08	M2 Maintenance Operations: 00–08
General Information	General Information
General Information	General Information
Suspension U-Bolt Torque Checking	Suspension U-Bolt Torque Checking
Draw Key Nut Torque Checking	Draw Key Nut Torque Checking
Wheel Nut Checking	Wheel Nut Checking
Air Brake Inspecting and Leak Test	Air Brake Inspecting and Leak Test
Inspection of the Drag Link	Inspection of the Drag Link
General Information	General Information
HVAC Air Filter Replacing	HVAC Air Filter Replacing1

1. Replace the HVAC air filter at the recommended interval or every six months.

Table 2, M3 Maintenance Operations

Table 3, M1 Maintenance Operations

M1 Maintenance Operations
Maintenance Operation No.	Title of Maintenance Operation
M1 Lubrication and Fluid Level Check: 00–12	M1 Lubrication and Fluid Level Check: 00–12
Clutch Adjusting, Manually Adjusted Clutches	Clutch Adjusting, Manually Adjusted Clutches
Allison and Eaton Fuller Transmission Breather Check	Allison and Eaton Fuller Transmission Breather Check
Fontaine	Fontaine
Freightliner Spring Front and Rear Suspension Spring Assemblies Inspection	Freightliner Spring Front and Rear Suspension Spring Assemblies Inspection
Tie Rod End Inspecting	Tie Rod End Inspecting
General Information	General Information1
General Information	General Information
Axle Breather Checking	Axle Breather Checking
Tire Check	Tire Check
Driveline Inspecting	Driveline Inspecting
Air Brake System Valve Inspection	Air Brake System Valve Inspection
AD–9	AD–92
Bosch Hydraulic Brake System Inspection	Bosch Hydraulic Brake System Inspection
Brake Lines and Fittings Inspection, Hydraulic Brakes	Brake Lines and Fittings Inspection, Hydraulic Brakes
Parking Brake Operational Check	Parking Brake Operational Check
Hydro-Max™ Brake System Inspection	Hydro-Max™ Brake System Inspection
Replacement of the WABCO System Saver Air Dryer Desiccant Cartridge	Replacement of the WABCO System Saver Air Dryer Desiccant Cartridge3
Inspection Procedure	Inspection Procedure4
Operating Test	Operating Test5
General Information	General Information
Inspection of the CNG Fuel System	Inspection of the CNG Fuel System6
CAT CGI Bellows and Piping Inspection	CAT CGI Bellows and Piping Inspection
Aerodynamic Component Inspection	Aerodynamic Component Inspection
Refrigerant Compressor Inspection	Refrigerant Compressor Inspection

1. Schedule III vehicles only.
2. If equipped with an oil-coalescing desiccant cartridge, replace the cartridge once a year, regardless of mileage. Otherwise use the M5 maintenance interval.
3. If equipped with an oil-coalescing desiccant cartridge, replace the cartridge once a year, regardless of mileage. Otherwise use the M5 maintenance interval.
4. Complete this procedure every 25,000 miles (40 225 km), 3 months, or 500 operating hours, whichever comes first.
5. The automatic drain valve should be inspected every 6 months or 1500 operating hours, whichever comes first.
6. M1 maintenance interval should be used as a general guideline; the actual frequency of filter element replacement will vary depending on cleanliness of the fuel station system.

Table 3, M1 Maintenance Operations

Table 4, M2 Maintenance Operations

M2 Maintenance Operations
Maintenance Operation No.	Title of Maintenance Operation
M1 Maintenance Operations: 00–07	M1 Maintenance Operations: 00–07
M2 Lubrication and Fluid Level Check: 00–13	M2 Lubrication and Fluid Level Check: 00–13
Inspection of the Air Compressor	Inspection of the Air Compressor
Radiator Cap Inspecting	Radiator Cap Inspecting
Horton Advantage® Fan Clutch	Horton Advantage® Fan Clutch
Hybrid Electric System Coolant Changing	Hybrid Electric System Coolant Changing
General Information	General Information1
Air Dryer AD–9, AD–IP, AD–IS/DRM Check Procedure	Air Dryer AD–9, AD–IP, AD–IS/DRM Check Procedure
Brake Pedal Linkage and Mounting Plate Inspection	Brake Pedal Linkage and Mounting Plate Inspection
Inspection of the CNG Fuel System	Inspection of the CNG Fuel System
Replacement of the CNG High-Pressure Fuel Filter Element	Replacement of the CNG High-Pressure Fuel Filter Element2
General Information	General Information

1. Schedule II vehicles only.
2. Inspect the CNG fuel cylinder every 12 months regardless of mileage.

Table 4, M2 Maintenance Operations