freightliner M2 Plus User manual

BUSINESS CLASS M2 PLUS MAINTENANCE MANUAL
Models: M2 Plus
STI-522-1 (02/10/2023) Published by
Daimler Trucks North America LLC
4747 N. Channel Ave.
Portland, OR 97217
Printed in U.S.A.

Foreword
Performing scheduled maintenance operations is important in obtaining safe, reliable operation of your vehicle. A
proper maintenance program will also help to minimize downtime and safeguard warranties.
IMPORTANT: The maintenance operations in this manual are not all-inclusive. Also refer to other
component and body manufacturers’ instructions for specific inspection and maintenance instructions.
Perform the operations in this maintenance manual at scheduled intervals. Perform the pretrip and post-trip
inspections, and daily/weekly/monthly maintenance, as outlined in the vehicle driver’s manual. Major components,
such as engines, transmissions, and rear axles, are covered in their own maintenance and operation manuals, that
are provided with the vehicle. Perform any maintenance operations listed at the intervals scheduled in those
manuals. Your Freightliner Dealership has the qualified technicians and equipment to perform this maintenance for
you. They can also set up a scheduled maintenance program tailored specifically to your needs. Optionally, they can
assist you in learning how to perform these maintenance procedures.
IMPORTANT: Descriptions and specifications in this manual were in effect at the time of printing.
Freightliner Trucks reserves the right to discontinue models and to change specifications or design at any
time without notice and without incurring obligation. Descriptions and specifications contained in this
publication provide no warranty, expressed or implied, and are subject to revision and editions without
notice.
Refer to https://northamerica.daimlertruck.com/ and www.FreightlinerTrucks.com for more information, or
contact Daimler Truck North America LLC at the address below.
Environmental and Safety Concerns and Recommendations
Whenever you see instructions in this manual to discard materials, you should attempt to reclaim and recycle them.
To preserve our environment, follow appropriate environmental rules and regulations when disposing of materials.
Servicing vehicles may result in contact with items known to the state of California to cause harm.
WARNING
Breathing diesel engine exhaust exposes you to chemicals known to the State of California to cause
cancer and birth defects or other reproductive harm.
Always start and operate the engine in a well-ventilated area. If in an enclosed are, vent the exhaust to the
outside. DO not modify or tamper with the exhaust system. Do not idle the engine except as necessary.
For more information go to www.P65warnings.ca.gov/diesel.
WARNING
Cancer and Reproductive Harm www.P65warnings.ca.gov/diesel.
NOTICE: Parts Replacement Considerations
Do not replace suspension, axle, or steering parts (such as springs, wheels, hubs, and steering gears) with used
parts. Used parts may have been subjected to collisions or improper use and have undetected structural damage.

© 2023–2023 Daimler Truck North America LLC
All rights reserved. No part of this publication, in whole or in part, may be translated, reproduced, stored in a retrieval
system, or transmitted in any form by any means, electronic, mechanical, photocopying, recording, or otherwise,
without the prior written permission of Daimler Truck North America LLC. Daimler Truck North America LLC is a
Daimler company.
Daimler Truck North America LLC
Service Systems and Documentation
P.O. Box 3849
Portland, Oregon 97208-3849

Daimler Truck North America LLC distributes the following major service publications in paper and electronic
formats. Refer to www.DTNAConnect.com.
Workshop/Service
Manual
Workshop/service manuals contain service and repair information for all vehicle
systems and components, except for major components such as engines,
transmissions, and rear axles. Each workshop/service manual section is divided
into subjects that can include general information, principles of operation,
removal, disassembly, assembly, installation, and specifications.
Maintenance Manual Maintenance manuals contain routine maintenance procedures and intervals for
vehicle components and systems. They have information such as lubrication
procedures and tables, fluid replacement procedures, fluid capacities,
specifications, and procedures for adjustments and for checking the tightness of
fasteners. Maintenance manuals do not contain detailed repair or service
information. Maintenance manuals should not be used for covering plant quality
or quality assurance issues. The purpose of maintenance manuals is to
increase the life of the component being maintained. These are
recommendations, not requirements.
Driver’s/Operator’s
Manual
Driver’s/operator’s manuals contain information needed to enhance the driver’s
understanding of how to operate and care for the vehicle and its components.
Each manual contains a chapter that covers pretrip and post-trip inspections,
and daily, weekly, and monthly maintenance of vehicle components.
Driver’s/operator’s manuals do not contain detailed repair or service information.
Service Bulletins Service bulletins provide the latest service tips, field repairs, product
improvements, and related information. Some service bulletins are updates to
information in the workshop/service manual. These bulletins take precedence
over workshop/service manual information, until the latter is updated; at that
time, the bulletin is usually canceled. The service bulletins manual is available
only to dealers. When doing service work on a vehicle system or part, check for
a valid service bulletin for the latest information on the subject.
IMPORTANT: Before using a particular service bulletin, check the current
service bulletin validity list to be sure the bulletin is valid.
Parts Technical Bulletins Parts technical bulletins provide information on parts. These bulletins contain
lists of parts and BOMs needed to do replacement and upgrade procedures.
Web-based repair, service, and parts documentation can be accessed using the following applications on the
www.DTNAConnect.com website.
DTNAConnect DTNAConnect provides Web-based access to the most up-to-date versions of
the publications listed above. In addition, the Service Solutions feature provides
diagnostic assistance with Symptoms Search, by connecting to a large
knowledge base gathered from technicians and service personnel. Search
results for both documents and service solutions can be narrowed by initially
entering vehicle identification data.
PartsProX PartsProX® is an electronic parts catalog system, showing the specified
vehicle’s build record.
Introduction
Descriptions of Service Publications
Business Class M2 Plus Maintenance Manual, 02/10/2023 I–1

EZWiring EZWiring™makes Freightliner, Sterling, Western Star, Thomas Built Buses, and
Freightliner Custom Chassis Corporation products’ wiring drawings and floating
pin lists available online for viewing and printing. EZWiring can also be
accessed from within PartsPro.
Warranty-related service information available on the www.DTNAConnect.com website includes the following
documentation.
Recall Campaigns Recall campaigns cover situations that involve service work or replacement of
parts in connection with a recall notice. These campaigns pertain to matters of
vehicle safety. All recall campaigns are distributed to dealers; customers receive
notices that apply to their vehicles.
Field Service Campaigns Field service campaigns are concerned with non-safety-related service work or
replacement of parts. All field service campaigns are distributed to dealers;
customers receive notices that apply to their vehicles.
Introduction
Descriptions of Service Publications
I–2 Business Class M2 Plus Maintenance Manual, 02/10/2023

For an example of a Business Class M2 Plus Maintenance Manual page, see Fig. 1.
f020125
A B C
D E
Cooling
12/06/2001
Business Class M2 Maintenance Manual, December 2001
20−01 Coolant Replacement
20−02 Cooling Fan Inspection
20
A. Maintenance Operation Number consists of the Group Number followed by the Sequence Number
B. Group Title
C. Group Number
D. Release Date
E. Group Number/Page Number
Fig. 1, Example of a Business Class M2 Plus Maintenance Manual Page
Introduction
Page Description
Business Class M2 Plus Maintenance Manual, 02/10/2023 I–3

Group No. Group Title
00...................... General Information
01................................ Engine
09.............................. AirIntake
13 ......................... AirCompressor
15................... Alternators and Starters
20................... Engine Cooling/Radiator
25................................ Clutch
26........................... Transmission
31 ............. Frame and Frame Components
32............................ Suspension
33 ............................. Front Axle
35 ............................. Rear Axle
40........................ Wheels and Tires
41 .............................. Driveline
42................................ Brakes
46............................... Steering
47 ................................. Fuel
49............................... Exhaust
60.................................. Cab
72 ................................ Doors
83................. Heater and Air Conditioner
88.............. Hood, Grille, and Cab Fenders
Introduction
Maintenance Manual Contents
I–4 Business Class M2 Plus Maintenance Manual, 02/10/2023

Title of Maintenance Operation (MOP) MOP Number
Determining Scheduled Maintenance Intervals.............................................00–01
Initial Maintenance (IM) Operations.....................................................00–06
M1 Maintenance Operations..........................................................00–07
M2 Maintenance Operations..........................................................00–08
M3 Maintenance Operations..........................................................00–09
M4 Maintenance Operations..........................................................00–10
M5 Maintenance Operations ..........................................................00–11
Maintenance Intervals for Schedule I....................................................00–03
Maintenance Intervals for Schedules II and III .............................................00–04
Maintenance Schedules ............................................................. 00–02
Noise Emission Controls.............................................................00–12
Overview of Maintenance Operations ................................................... 00–05
General Information 00
Index, Alphabetical
Business Class M2 Plus Maintenance Manual, 02/120/2023

Determining Scheduled
Maintenance Intervals
Performing regular maintenance will help ensure that
your vehicle delivers safe, reliable service and
optimum performance. A proper maintenance
program will also help to minimize downtime and
safeguard warranties.
To determine the correct maintenance intervals for
your vehicle, you must first determine the type of
service or conditions the vehicle will be operating in.
Most vehicles operate in conditions that fall within
one of the three schedules. Before placing your
vehicle in service, determine whether Schedule I, II,
or III applies to your vehicle.
Schedules I-III
Schedule I (severe service) applies to vehicles that
travel up to 6000 miles (10 000 kilometers) annually
or that operate under severe conditions. Examples of
Schedule I usage are:
•operation on extremely poor roads or where
there is heavy dust accumulation
•constant exposure to extreme hot, cold, salt air,
or other extreme climates
•frequent short-distance travel
•construction-site operation
•city operation such as fire truck and garbage
truck.
•farm operation
Schedule II (short-haul transport) applies to vehicles
that travel up to 60,000 miles (100 000 kilometers)
annually and operate under normal conditions.
Examples of Schedule II usage are:
•operation primarily in cities and densely
populated areas
•local transport with infrequent freeway travel
•high percentage of stop-and-go travel
Schedule III (long-haul transport) is for vehicles that
travel more than 60,000 miles (100 000 kilometers)
annually with minimal city or stop-and-go operation.
Examples of Schedule III usage are:
•regional delivery that is mostly freeway miles
•interstate transport
•any road operation with high annual mileage
Maintenance Schedules
After determining the schedule appropriate to your
vehicle, refer to the Maintenance Schedules to
determine when to perform the Initial Maintenance
(IM) and the frequency of performing subsequent
maintenance intervals for each schedule.
Maintenance Intervals
Refer to Maintenance Intervals for Schedule I,
Schedule II, and Schedule III to determine which
maintenance interval(s) should be performed when
your vehicle reaches the mileage or hours of
operation listed in these tables.
Maintenance Operations
Groups 01 through 83 in this manual have an index
at the beginning of each group. The index lists the
title of maintenance operations and the Maintenance
Operation (MOP) numbers for that group. Follow the
instructions under the MOP number to perform the
required maintenance.
In addition to the maintenance operations required
for the maintenance interval, perform all the daily
maintenance procedures in Chapter 11, "Pretrip
Inspection and Daily Maintenance," in the Business
Class® M2 Plus Driver’s Manual.
General Information 00
Determining Scheduled Maintenance Intervals: 00–01
Business Class M2 Plus Maintenance Manual, 02/120/2023 00/1

Maintenance Schedules
Schedule Maintenance Intervals
Maintenance Interval Frequency Mileage km Hours
Schedule I*
(severe service)
for vehicles that travel up to
6000 miles (9700 km) annually
Initial Maintenance (IM) first 1000 1600 100
Maintenance 1 (M1) every 1000 1600 100
Maintenance 2 (M2) every 4000 6400 400
Maintenance 3 (M3) every 8000 12 900 800
Maintenance 4 (M4) every 16,000 25 800 1600
Maintenance 5 (M5) every 32,000 51 500 3200
Schedule II
(short-haul transport)
for vehicles that travel up to
60,000 miles (97 000 km)
annually
Initial Maintenance (IM) first 8000 12 900
—
Maintenance 1 (M1) every 8000 12 900
Maintenance 2 (M2) every 16,000 25 800
Maintenance 3 (M3) every 32,000 51 500
Maintenance 4 (M4) every 64,000 103 000
Maintenance 5 (M5) every 128,000 206 000
Schedule III
(long-haul transport)
for vehicles that travel over
60,000 miles (97 000 km)
annually
Initial Maintenance (IM) first 10,000 16 000
—
Maintenance 1 (M1) every 10,000 16 000
Maintenance 2 (M2) every 20,000 32 000
Maintenance 3 (M3) every 40,000 64 000
Maintenance 4 (M4) every 80,000 129 000
Maintenance 5 (M5) every 160,000 257 000
*For Schedule I vehicles equipped with an hourmeter, use maintenance intervals based on hours of operation rather than mileage.
Table 1, Maintenance Schedules
General Information00
Maintenance Schedules: 00–02
Business Class M2 Plus Maintenance Manual, 02/120/202300/2

Maintenance Intervals for Schedule I
Maintenance
Sequence Maintenance Interval Service Date Miles km Hours
1st IM and M1 1000 1600 100
2nd M1 2000 3200 200
3rd M1 3000 4800 300
4th M1 and M2 4000 6400 400
5th M1 5000 8000 500
6th M1 6000 9700 600
7th M1 7000 11 300 700
8th M1, M2, and M3 8000 12 900 800
9th M1 9000 14 500 900
10th M1 10,000 16 100 1000
11th M1 11,000 17 700 1100
12th M1 and M2 12,000 19 300 1200
13th M1 13,000 20 900 1300
14th M1 14,000 22 500 1400
15th M1 15,000 24 100 1500
16th M1, M2, M3, and M4 16,000 25 700 1600
17th M1 17,000 27 400 1700
18th M1 18,000 29 000 1800
19th M1 19,000 30 600 1900
20th M1 and M2 20,000 32 200 2000
21st M1 21,000 33 800 2100
22nd M1 22,000 35 400 2200
23rd M1 23,000 37 000 2300
24th M1, M2, and M3 24,000 38 600 2400
25th M1 25,000 40 200 2500
26th M1 26,000 41 800 2600
27th M1 27,000 43 500 2700
28th M1 and M2 28,000 45 100 2800
29th M1 29,000 46 700 2900
30th M1 30,000 48 300 3000
31st M1 31,000 50 000 3100
32nd M1, M2, M3, M4, and M5 32,000 51 500 3200
Table 2, Maintenance Intervals for Schedule I
General Information 00
Maintenance Intervals for Schedule I: 00–03
Business Class M2 Plus Maintenance Manual, 02/120/2023 00/3

Maintenance Intervals for Schedules II and III
Maintenance
Sequence Maintenance Interval Service Date Schedule II Schedule III
Miles km Miles km
1st IM and M1 8000 12 900 10,000 16 000
2nd M1 and M2 16,000 25 700 20,000 32 200
3rd M1 24,000 38 600 30,000 48 300
4th M1, M2, and M3 32,000 51 500 40,000 64 400
5th M1 40,000 64 400 50,000 80 500
6th M1 and M2 48,000 77 200 60,000 96 600
7th M1 56,000 90 000 70,000 112 700
8th M1, M2, M3, and M4 64,000 103 000 80,000 128 700
9th M1 72,000 116 000 90,000 144 800
10th M1 and M2 80,000 129 000 100,000 161 000
11th M1 88,000 142 000 110,000 177 000
12th M1, M2, and M3 96,000 154 000 120,000 193 000
13th M1 104,000 167 000 130,000 209 000
14th M1, and M2 112,000 180 000 140,000 225 000
15th M1 120,000 193 000 150,000 241 000
16th M1, M2, M3, M4, and M5 128,000 206 000 160,000 257 000
17th M1 136,000 219 000 170,000 274 000
18th M1 and M2 144,000 232 000 180,000 290 000
19th M1 152,000 245 000 190,000 306 000
20th M1, M2, and M3 160,000 257 000 200,000 322 000
21st M1 168,000 270 000 210,000 338 000
22nd M1 and M2 176,000 283 000 220,000 354 000
23rd M1 184,000 296 000 230,000 370 000
24th M1, M2, M3, and M4 192,000 309 000 240,000 386 000
25th M1 200,000 322 000 250,000 402 000
26th M1 and M2 208,000 335 000 260,000 418 000
27th M1 216,000 348 000 270,000 435 000
28th M1, M2, and M3 224,000 360 000 280,000 451 000
29th M1 232,000 373 000 290,000 467 000
30th M1 and M2 240,000 386 000 300,000 483 000
31st M1 248,000 400 000 310,000 500 000
32nd M1, M2, M3, M4, and M5 256,000 412 000 320,000 515 000
Table 3, Maintenance Intervals for Schedules II and III
General Information00
Maintenance Intervals for Schedules II and III: 00–04
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Maintenance Operations
Maintenance
Operation No. Title of Maintenance Operation Maintenance Intervals
IM/M1M2M3M4M5
09-01 Air Cleaner Element Inspecting and Replacing • •
13-01 Air Compressor Inspection • • • •
15-01 Alternator, Battery, and Starter Checking • •
20-01 Radiator Cap Inspecting • • • •
20-02 Radiator Pressure Flushing and Coolant Changing • •
20-03 Fan Drive Inspecting (Noise Emission Control) • • • •
25-01 Eaton Fuller Clutch Release Bearing Lubricating • • • • •
25-02 Clutch Hydraulic Fluid Changing •
25-03 Clutch Adjusting, Manually Adjusted Clutches • • • • •
26-01 Detroit Automated Transmission Fluid Change and Magnetic
Plug Cleaning •
26-02 Detroit Automated Transmission Fluid Level Inspection •
26-03 Transmission Fluid Level Checking • • • • •
26-04 Eaton Fuller Transmission Fluid Changing and Magnetic
Plug Cleaning*••••
26-05 Allison and Eaton Fuller Transmission Breather Checking • • • • •
26-06 Eaton Fuller Transmission Air Filter/Regulator Element
Cleaning ••••
26-07 Allison Transmission Fluid and Filter Changing • • •
31-01 Frame Fastener Torque Checking • • •
31-02 Fifth Wheel Inspecting • • • • •
31-03 Fifth Wheel Lubricating • • • • •
31-04 Trailer Electrical Connector Lubricating • • • • •
32-01 Suspension Inspecting • • • • •
32-02 Suspension U-Bolt Torque Checking • • • •
33-01 Kingpin Lubricating†• ••••
33-02 Tie Rod End Lubricating§• ••••
33-03 Draw Key Nut Torque Checking • • • •
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 • ••••
33-06 All-Axle Alignment Check •
33-07 Steer Axle Hub Cap Vent Plug Inspection • • • • •
35-01 Axle Lubricant Level Checking • • • • •
35-02 Axle Breather Checking • • • • •
35-03 Axle Lubricant Changing and Magnetic Plug Cleaning • •
General Information 00
Overview of Maintenance Operations: 00–05
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Maintenance Operations
Maintenance
Operation No. Title of Maintenance Operation Maintenance Intervals
IM/M1M2M3M4M5
40-01 Wheel Nut Checking • • •
40-02 Tire Check • • • • •
41-01 Driveline Inspecting • • • • •
41-02 Driveline Lubricating • • • • •
42-01 Air Brake System Valve Inspection • • • • •
42-02 Bendix Air Dryer Desiccant Replacement‡• ••••
42-03 Governor D–2A Check • •
42-04 Bosch Hydraulic Brake System Inspection • • • • •
42-05 Dana Spicer, Haldex, and Gunite Slack Adjuster Lubrication • • • • •
42-06 Meritor Camshaft Bracket Lubrication • • • •
42-07 Meritor Slack Adjuster Lubrication • • • • •
42-08 Air Dryer AD–9, AD–IP, and AD–IS/DRM Check • • • •
42-09 Bendix E-6 Foot Control Valve Inspection and Lubrication •
42-10 Brake Inspection • • • • •
42-11 Hydro-Max™Brake System Inspection • • • • •
42-12 WABCO System Saver Air Dryer Desiccant Cartridge
Replacement‡• ••••
42-13 Versajust Slack Adjuster Inspection and Lubrication§• ••••
46-01 Drag Link Inspecting • • •
46-02 Power Steering Fluid Changing • •
46-04 Power Steering Gear Lubricating • • • • •
46-06 Power Steering Filter Changing •
47-01 Fuel Tank Band Nut Tightening •
47-02 Fuel/Water Separator Element Replacing • •
47-03 LNG Fuel System Inspecting • • • • •
47-04 LNG Vacuum Integrity Testing • • •
47-05 CNG Fuel System Inspecting • • • •
47-06 CNG High-Pressure Fuel Filter Element Replacing • • • • •
47-07 CNG Fuel Cylinder Inspecting • • •
54-01 Trailer Cable Inspection and Cleaning •
54-02 Electrical Component Inspection •
60-01 Mirror Folding Check ••
60-02 Aerodynamic Component Inspection • • • • •
83-01 Air Conditioner Inspecting • • • • •
83-02 HVAC Air Filter Replacing¶•••
General Information00
Overview of Maintenance Operations: 00–05
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Maintenance Operations
Maintenance
Operation No. Title of Maintenance Operation Maintenance Intervals
IM/M1M2M3M4M5
88-01 Hood Rear Support Lubrication • • • • •
*Change petroleum-based lubricants at M2 (including M3, M4, and M5). Change synthetic lubricants at M5 only.
†For Detroit axles, complete this procedure once a year or at the following applicable interval, whichever comes first: every 5000 miles (8000 km) for Schedule
I vehicles; every 25,000 miles (40 000 km) for Schedule II vehicles; or every 100,000 miles (161 000 km) for Schedule III vehicles.
‡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 (40 200 km), 3 months, or 500 operating hours, whichever comes first.
¶Replace the HVAC air filter at the recommended interval or every six months.
Table 4, Maintenance Operations
General Information 00
Overview of Maintenance Operations: 00–05
Business Class M2 Plus Maintenance Manual, 02/120/2023 00/7

NOTE: The IM Operations include the maintenance
operations in Table 5 and all of the maintenance
operations in Table 6, M1 Maintenance Operations.
Initial Maintenance (IM) Operations
Maintenance
Operation No. Title of Maintenance Operation
00-07 Perform All M1 Operations
31-01 Frame Fastener Torque Checking
32-02 Suspension U-Bolt Torque Checking
33-03 Draw Key Nut Torque Checking
33-06 All-Axle Alignment Check
47-01 Fuel Tank Band Nut Tightening
Table 5, Initial Maintenance (IM) Operations
General Information00
Initial Maintenance (IM) Operations: 00–06
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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 Plus Driver’s Manual.
M1 Maintenance Operations
Maintenance
Operation No. Title of Maintenance Operation
25-01 Eaton Fuller Clutch Release Bearing Lubricating
25-03 Clutch Adjusting, Manually Adjusted Clutches
26-03 Transmission Fluid Level Checking
26-05 Allison and Eaton Fuller Transmission Breather Checking
31-02 Fifth Wheel Inspecting
31-03 Fifth Wheel Lubricating
31-04 Trailer Electrical Connector Lubricating
32-01 Suspension Inspecting
33-01 Kingpin Lubricating*
33-02 Tie Rod End Lubricating*
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†
33-07 Steer Axle Hub Cap Vent Plug Inspection
35-01 Axle Lubricant Level Checking
35-02 Axle Breather Checking
40-02 Tire Check
41-02 Driveline Inspecting
41-01 Driveline Lubricating
42-01 Air Brake System Valve Inspection
42-02 Bendix Air Dryer Desiccant Replacement (with an oil-coalescing
desiccant cartridge)‡
42-05 Dana Spicer, Haldex, and Gunite Slack Adjuster Lubrication
42-07 Meritor Slack Adjuster Lubrication
42-10 Brake Inspection
42-11 Hydro-Max™Brake System Inspection
42-12 WABCO System Saver Air Dryer Desiccant Cartridge Replacement‡
42-13 Versajust Slack Adjuster Inspection and Lubrication§
46-03 Power Steering Gear Lubricating
47-03 LNG Fuel System Inspecting
47-06 CNG High-Pressure Fuel Filter Element ¶
60-02 Aerodynamic Component Inspection
72-01 Door Seals Lubricating
General Information 00
M1 Maintenance Operations: 00–07
Business Class M2 Plus Maintenance Manual, 02/120/2023 00/9

M1 Maintenance Operations
Maintenance
Operation No. Title of Maintenance Operation
83-01 Air Conditioner Inspecting
88-01 Hood Rear Support Lubrication
*For Detroit axles, complete this procedure once a year or at the following applicable interval, whichever comes
first: every 5000 miles (8000 km) for Schedule I vehicles; every 25,000 miles (40 200 km) for Schedule II vehicles;
or every 100,000 miles (161 000 km) for Schedule III vehicles.
†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 (40 200 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
replacement will vary depending on cleanliness of the fuel station system.
Table 6, M1 Maintenance Operations
General Information00
M1 Maintenance Operations: 00–07
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