Thomas SAF-T-LINER C2 User manual

SAF-T-LINER C2 SCHOOL BUS MAINTENANCE MANUAL
Models: C2
C2 G
C2 LPG
eC2
STI-466-8 (09/20/2021) 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 pretrip inspection and daily maintenance as outlined in the Saf-T-Liner C2 School Bus Driver’s Manual.
Perform the maintenance operations in this manual at scheduled intervals based on the distance the vehicle has
traveled or hours of operation. Your Freightliner dealership has qualified technicians and equipment to perform this
maintenance.
IMPORTANT: Descriptions and specifications in this manual were in effect at the time of printing. Thomas
Built Buses 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 www.Daimler-TrucksNorthAmerica.com and www.ThomasBus.com for more information, or contact
Daimler Trucks 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 can-
cer and birth defects or other reproductive harm.
Always start and operate the engine in a well-ventilated area. If in an enclosed area, vent the exhaust to
the outside. Do not modify or tamper with the exhaust system. Do not idle the engine except as neces-
sary.
For more information go to www.P65warnings.ca.gov/diesel.
WARNING
Cancer and Reproductive Harm www.P65warnings.ca.gov/diesel.
IMPORTANT: Modifications to fuel systems, emission related components, or air conditioning systems
may constitute a noncompliant EPA or CARB vehicle and such actions are prohibited.
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.

© 2004–2022 Daimler Trucks 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 Trucks North America LLC. Daimler Trucks North America LLC is a
Daimler company.
Daimler Trucks North America LLC
Service Systems and Documentation (CVI-SSD)
P.O. Box 3849
Portland, Oregon 97208-3849

Daimler Trucks 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, trans-
missions, 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, specifica-
tions, and procedures for adjustments and for checking the tightness of fasten-
ers. Maintenance manuals do not contain detailed repair or service information.
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 pre-trip 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 improve-
ments, and related information. Some service bulletins are updates to informa-
tion 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 knowl-
edge base gathered from technicians and service personnel. Search results for
both documents and service solutions can be narrowed by initially entering ve-
hicle identification data.
PartsPro PartsPro® is an electronic parts catalog system, showing the specified vehicle’s
build record.
EZWiring EZWiring™makes Thomas Built Buses, Freightliner, Freightliner Custom Chas-
sis Corporation, Sterling, and Western Star products’ wiring drawings and float-
ing pin lists available online for viewing and printing. EZWiring can also be ac-
cessed from within PartsPro.
Introduction
Descriptions of Service Publications
Saf-T-Liner C2 School Bus Maintenance Manual, July 2018 I–1

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; cus-
tomers receive notices that apply to their vehicles.
Introduction
Descriptions of Service Publications
I–2 Saf-T-Liner C2 School Bus Maintenance Manual, July 2018

For a page example of the printed manual, see Fig. 1.
A B C
D E
02/10/2004 f020152
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, Page Example of the Printed Manual
Introduction
Page Description
Saf-T-Liner C2 School Bus Maintenance Manual, July 2018 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
54 .......... Electrical, Instruments, and Controls
72.................................Doors
83 ................. Heater and Air Conditioner
88.............. Hood, Grille, and Cab Fenders
Introduction
Maintenance Manual Contents
I–4 Saf-T-Liner C2 School Bus Maintenance Manual, July 2018

Title of Maintenance Operation (MOP) MOP Number
Determining Scheduled Maintenance Intervals.............................................00–01
Maintenance Intervals for Schedule I....................................................00–03
Maintenance Intervals for Schedule II ................................................... 00–04
Maintenance Schedules ............................................................. 00–02
Noise Emission Controls.............................................................00–06
Overview of Maintenance Operations ................................................... 00–05
Verification of Inspections Log.........................................................00–07
General Information 00
Index, Alphabetical
Saf-T-Liner C2 School Bus Maintenance Manual, May 2021

Determining Scheduled
Maintenance Intervals
Performing regular maintenance will help ensure that
your vehicle delivers safe, reliable service and opti-
mum 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 ser-
vice or conditions the vehicle will be operating in.
Most vehicles operate in conditions that fall within
one of two schedules. Before placing your vehicle in
service, determine whether schedule I or II applies to
your vehicle.
Schedules I and II
Schedule I applies to vehicles that travel up to
20,000 miles (32 000 kilometers) annually. Examples
of Schedule I usage are:
•frequent short-distance travel
•operation primarily in cities and densely popu-
lated areas
•local transport with infrequent freeway travel
•high percentage of stop-and-go travel
Schedule II applies to vehicles that travel over
20,000 miles (32 000 kilometers) annually. An ex-
ample of Schedule II usage is:
•less frequent stop-and-go travel
Maintenance Schedules
After determining the schedule appropriate to your
vehicle, refer to the Maintenance Schedules to de-
termine when to perform the Initial Maintenance (IM)
and the frequency of performing subsequent mainte-
nance intervals for each schedule.
Maintenance Intervals
Refer to Maintenance Intervals for Schedule I or
Maintenance Intervals for Schedule II to determine
which maintenance interval(s) should be performed
when your vehicle reaches the mileage or months of
operation listed in these subjects.
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 Mainte-
nance 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 and Chapter
12, "Pre- and Post-Trip Checklists" and Pre- and
Post-Trip Inspections and Maintenance," in the Saf-T-
Liner C2 School Bus Driver’s Manual.
IMPORTANT: Maintenance operations appearing
in italics in the following table are for noise
emission control components. Numbers in the
table are reference numbers matching those in
the text of this manual.
General Information 00
Determining Scheduled Maintenance Intervals: 00–01
Saf-T-Liner C2 School Bus Maintenance Manual, May 2021 00/1

Maintenance Schedules
Schedule Maintenance Intervals
Maintenance Interval Frequency Mileage*km Months*
Schedule I vehicles that
annually travel up to 20,000
miles (32 000 km)
Initial Maintenance (IM) first 4000 6400 6
Maintenance 1 (M1) every 4000 6400 6
Maintenance 2 (M2) every 8000 12 800 12
Maintenance 3 (M3) every 16,000 25 600 18
Maintenance 4 (M4) every 32,000 51 200 24
Maintenance 5 (M5) every 48,000 77 200 30
Schedule II vehicles that travel
over 20,000 miles (32 000 km)
annually
Initial Maintenance (IM) first 4000 6400 6
Maintenance 1 (M1) every 8000 12 800 6
Maintenance 2 (M2) every 16,000 25 600 12
Maintenance 3 (M3) every 32,000 51 200 18
Maintenance 4 (M4) every 48,000 77 200 24
Maintenance 5 (M5) every 64,000 103 000 36
*Use mileage or months, whichever comes first.
Table 1, Maintenance Schedules
General Information00
Maintenance Schedules: 00–02
Saf-T-Liner C2 School Bus Maintenance Manual, May 202100/2

Maintenance Intervals for Schedule I
Maintenance
Sequence Maintenance Interval Service Date Miles*km Months*
1st IM and M1 4000 6400 6
2nd M1 and M2 8000 12 800 12
3rd M1 12,000 19 200 —
4th M1, M2, and M3 16,000 25 600 18
5th M1 20,000 32 000 —
6th M1 and M2 24,000 38 400 —
7th M1 28,000 44 800 —
8th M1, M2, M3, and M4 32,000 51 200 24
9th M1 36,000 58 000 —
10th M1 and M2 40,000 64 300 —
11th M1 44,000 70 800 —
12th M1, M2, M3, and M5 48,000 77 200 30
*Use mileage or months, whichever comes first.
Table 2, Maintenance Intervals for Schedule I
General Information 00
Maintenance Intervals for Schedule I: 00–03
Saf-T-Liner C2 School Bus Maintenance Manual, May 2021 00/3

Maintenance Intervals for Schedule II
Maintenance
Sequence Maintenance Interval Service Date Miles*km Months*
1st IM 4000 6400 6
2nd M1 8000 12 800 6
3rd M1 and M2 16,000 25 600 12
4th M1 24,000 38 400 —
5th M1, M2, and M3 32,000 51 200 18
6th M1 40,000 64 300 —
7th M1, M2, and M4 48,000 44 800 24
8th M1 56,000 90 100 —
9th M1, M2, M3, and M5 64,000 103 000 36
10th M1 72,000 115 800 —
11th M1 and M2 80,000 128 700 42
12th M1 88,000 141 600 —
13th M1, M2, M3, and M4 96,000 154 400 48
*Use mileage or months, whichever comes first.
Table 3, Maintenance Intervals for Schedule II
General Information00
Maintenance Intervals for Schedule II: 00–04
Saf-T-Liner C2 School Bus Maintenance Manual, May 202100/4

Maintenance Operation Procedures and Intervals
Maintenance
Operation No. Title of Maintenance Operation Maintenance Intervals
IM M1 M2 M3 M4 M5
01–01 Engine Drive Belt Inspecting • • •
01–02 Engine Support Fastener Checking •
08–01 Torque Mark Inspection, Electric Vehicle • •
08–02 Electric Motor Inspection, Electric Vehicle • •
08–03 Transmission Inspection, Electric Vehicle • •
09–01 Air Cleaner Element Inspecting and Replacing*••••••
13–01 Air Compressor Inspection • • • •
13–02 Air Compressor Filter Replacement, Propane Engine •
13–03 Air Compressor Oil Separator Element and Main Seal
Replacement, Electric Vehicle†
13–04 Air Compressor Filter Replacement, Electric Vehicle‡•••••
13–05 Rebuild Air Compressor Air-End, Electric Vehicle§
13–06 Air Compressor Oil Level Checking and Filling, Electric
Vehicle¶
15–01 Alternator, Battery, and Starter Connections Check •
20–01 Radiator Cap Inspection • • • •
20–02 Radiator Pressure Flush and Coolant Change**
20–03 Fan Drive Inspection (Noise Emission Control) ••••
20–04 Coolant Heater Check, Webasto • • • •
20–05 Coolant System Maintenance, Electric Vehicle • •
20–06 Coolant Change, Electric Vehicle††
25–01 Eaton® Fuller® Clutch Release Bearing Lubricating ••••••
25–02 Eaton Fuller Clutch Release Cross-Shaft Lubricating ••••••
25–03 Clutch Hydraulic Fluid Level Checking •••••
25–04 Clutch Hydraulic Fluid Changing •
25–05 Electronic Clutch Actuator (ECA) Lubrication ••••••
26–01 Manual Transmission Oil Level Checking • • • •
26–02 Eaton Fuller Transmission Fluid Changing and Magnetic Plug
Cleaning‡‡
26–03 Allison and Eaton Fuller Transmission Breather Checking •••••
26–04 Allison Transmission Fluid and Filter Changing§§
26–05 Proterra Transmission Fluid Level Checking, Electric Vehicle • •
26–06 Proterra Transmission Fluid Changing, Electric Vehicle¶¶
31–01 Frame Fastener Torque Check • •
31–02 Automatic Tire Chain System Checking***
31–03 Off-Season Chain Wheel Removal†††
General Information 00
Overview of Maintenance Operations: 00–05
Saf-T-Liner C2 School Bus Maintenance Manual, May 2021 00/5

Maintenance Operation Procedures and Intervals
Maintenance
Operation No. Title of Maintenance Operation Maintenance Intervals
IM M1 M2 M3 M4 M5
32–01 Suspension Inspecting •••••
32–02 Suspension Lubricating •••••
32–03 Suspension U-Bolt Torque Checking • • • •
33–01 Kingpin Lubricating, Detroit™Axle‡‡‡ •••••
33–02 Tie Rod End Lubricating‡‡‡ •••••
33–03 Draw Key Nut Inspecting • • • •
33–04 Tie Rod End Inspecting •••••
35–01 Axle Lubricant Level Checking •••••
35–02 Axle Breather Checking ••••••
35–03 Axle Lubricant Changing and Magnetic Plug Cleaning§§§
40–01 Wheel Nut Checking • • •
41–01 Driveline Inspection •••••
41–02 Driveline Lubrication •••••
42–01 Bendix Air Dryer AD-9 or AD-IP Desiccant Replacing¶¶¶ •
42–02 Governor D-2A Checking •
42–03 Hydraulic Brake Lining Wear Checking ••••••
42–04 Slack Adjuster Lubricating ••••••
42–05 Meritor Camshaft Bracket Lubricating • • • •
42–06 Air Dryer AD-9, AD-IP Checking • • • •
42–07 Brake Lines and Fittings Inspecting, Hydraulic Brakes ••••••
42–08 Brake Pedal Linkage and Mounting Plate Inspecting • • • •
42–09 Air Brake Inspecting and Leakage Testing • • •
42–10 ABS Tone Rings Cleaning ••••••
42–11 Bendix Hydro-Max® Brake System Inspecting ••••••
42–12 Brake Caliper Slide Pin Lubricating, Hydraulic Brakes****
42–13 Drum Brake Shoe Roller Lubricating • • • •
42–14 Foot Brake Valve Actuator Lubricating, Bendix E-6 • • •
42–15 Brake Inspecting ••••••
42–16 WABCO System Saver Air Dryer Desiccant Cartridge
Replacing¶¶¶ •
42–17 Bendix Automatic Drain Valve Operating and Leakage
Tests†††† ••••••
46–01 Drag Link Inspecting • • •
46–02 Power Steering Fluid and Filter Changing, Diesel •
46–03 Power Steering Fluid Level Inspecting •••• •
46–04 Power Steering Gear Lubricating ••••••
General Information00
Overview of Maintenance Operations: 00–05
Saf-T-Liner C2 School Bus Maintenance Manual, May 202100/6

Maintenance Operation Procedures and Intervals
Maintenance
Operation No. Title of Maintenance Operation Maintenance Intervals
IM M1 M2 M3 M4 M5
46–05 Drag Link Lubricating ••••••
46–06 Power Steering Motor Lubrication, Electric Vehicle‡‡‡‡
46–07 Power Steering Fluid and Filter Changing, Electric
Vehicle§§§§
47–01 Fuel Tank Band Nut Tightening •
47–02 Fuel/Water Separator Element Replacing •
47–03 Inline Fuel Strainer Replacing • • • •
47–04 Fuel Sender Checking • • • •
47–05 Fuel Tank and Line Inspecting, Propane Engine •
47–06 Fuel Rail Fitting and Injector Inspecting, Propane Engine •
47–07 Fuel Filter Replacing, Propane Engine •
47–08 CNG Fuel System Inspection • • • •
47–09 CNG Fuel Filter Replacement •••••
47–10 CNG Fuel Cylinder Inspection • • •
49–01 Exhaust System Inspecting (Noise Emission Control) ••••
54–01 Battery Voltage Check ••••••
54–02 Charge Port Inspection, Electric Vehicle • •
54–03 Ancillary Bay Desiccant Plug Inspection and Replacement,
Electric Vehicle •••••
54–04 Battery Pack Desiccant Replacement, Electric Vehicle • •
72–01 Door Seals Lubrication ••••••
72–02 Air Door Inspection¶¶¶¶
83–01 Air Conditioner Inspection •••••
83–02 HVAC Air Filter Cleaning • •
General Information 00
Overview of Maintenance Operations: 00–05
Saf-T-Liner C2 School Bus Maintenance Manual, May 2021 00/7

Maintenance Operation Procedures and Intervals
Maintenance
Operation No. Title of Maintenance Operation Maintenance Intervals
IM M1 M2 M3 M4 M5
88–01 Hood Rear Support Lubrication •••••
*Inspect the air filter every 6 months. Replace the air filter every 12 months, or when filter restriction reaches 25 inH
2
0 (if equipped with an air restriction
gauge).
†Air compressor oil separator element and main seal replacement should be performed once a year.
‡Inspect the filters every 3 months. Replace the filters every 6 months.
§Rebuild the air compressor air-end every three years.
¶Check the air compressor and thermal well oil levels once a month.
** Replace the organic acid technology (OAT) coolant every 600,000 miles (965 400 km); supplemental coolant additives (SCAs) are not used with OAT cool-
ant. Replace nitrited organic-acid technology (NOAT) and SCA pre-charge ethylene glycol coolants every 30,000 miles (48 270 km). You must check and, if nec-
essary, recharge the SCA levels and freeze point every 25,000 miles (40 225 km) or 6 months, whichever comes first. See the applicable engine operation and
maintenance manual for further information.
†† Change the organic acid technology (OAT) coolant in the electric vehicle every five years; supplemental coolant additives (SCAs) are not used with OAT
coolant.
‡‡ For oil change intervals, see the applicable Eaton Fuller Driver Manual or Service Manual.
§§ For oil and filter change intervals, see the applicable Allison Operator’s Manual.
¶¶ The Proterra transmission fluid should be changed every three years.
*** The system check should be completed every 500 hours of operation.
††† The chain wheels should be removed during the spring and summer months.
‡‡‡ For Detroit axles, complete this procedure once a year or at the following applicable interval, whichever comes first: every 5000 miles (8000 km) for Sched-
ule I vehicles; or every 10,000 miles (16 000 km) for Schedule II vehicles.
§§§ For Detroit rear axles with petroleum-based oil, change the lubricant every 100,000 miles (161 000 km) or every 12 months, whichever comes first; if syn-
thetic oil is used, change the lubricant every 250,000 miles (402 000 km) or every 36 months, whichever comes first. For Meritor rear axles with petroleum-
based oil, change the lubricant at 100,000 miles (161 000 km) or at 12 months of service, whichever comes first, and every 24 months thereafter; if synthetic oil
is used, change the lubricant every 250,000 miles (402 000 km) or every 36 months, whichever comes first.
¶¶¶ If equipped with an oil-coalescing desiccant cartridge, replace the cartridge once a year, regardless of mileage.
**** For lubricating intervals, see the Bosch Pin Slide Disc Brakes Service Manual.
†††† The automatic drain valve should be inspected every 6 months or 1500 operating hours, whichever comes first.
‡‡‡‡ Lubricate the power steering motor in the electric vehicle every 6000 miles (9654 km) or 12,000 operating hours, whichever comes first.
§§§§ Change the power steering fluid and filter in the electric vehicle every 100,000 miles (160 900 km).
¶¶¶¶ Inspect the air door every 60 days or 4000 miles (6436 km), whichever comes first.
¶¶¶¶ Clean the HVAC air filter every 12 months or 8000 miles (12 872 km), whichever comes first.
Table 4, Maintenance Operation Procedures and Intervals
General Information00
Overview of Maintenance Operations: 00–05
Saf-T-Liner C2 School Bus Maintenance Manual, May 202100/8

Noise Emission Controls
Federal Law, Part 205:
Transportation Equipment Noise
Emission Controls
Part 205, Transportation Equipment Noise Emission
Controls, requires the vehicle manufacturer to furnish
each new vehicle with written instructions for the
proper maintenance, use, and repair of the vehicle
by the ultimate purchaser to provide reasonable as-
surance of the elimination or minimization of noise
emission degradation throughout the life of the ve-
hicle. In compliance with the law, the Noise Emission
Control Systems maintenance located in each appli-
cable group within this manual, in conjunction with
the vehicle workshop manual, provides these instruc-
tions to owners.
Recommendations for
Replacement Parts
Replacement parts used for maintenance or repair of
noise emission control systems should be genuine
Freightliner parts. If other than genuine Freightliner
parts are used for replacement or repair of compo-
nents affecting noise emission control, the owner
should be sure that such parts are warranted by their
manufacturer to be equivalent to genuine Freightliner
parts in performance and durability.
Freightliner Noise Emissions
Warranty
Refer to the vehicle owner’s warranty information
book for warranty information concerning noise emis-
sion control systems.
Tampering With the Noise
Control System is Prohibited
Federal law prohibits the following acts or the caus-
ing thereof:
1. The removal or rendering inoperative by any per-
son other than for purposes of maintenance, re-
pair, or replacement, of any device or element of
design incorporated into any new vehicle for the
purpose of noise control prior to its sale or deliv-
ery to the ultimate purchaser or while it is in use,
2. The use of the vehicle after such device or ele-
ment of design has been removed or rendered
inoperative by any person.
Among those acts presumed to constitute tampering
are the acts listed below:
1. Removal of engine noise-deadening panels, in-
cluding cab or hood liners.
2. Removal of or rendering inoperative the engine
speed governor so as to allow engine speed to
exceed the manufacturer’s specifications.
3. Removal of or rendering inoperative the fan
clutch, including bypassing the control on any
thermostatic fan drive to cause it to operate con-
tinuously.
4. Removal of the fan shroud.
5. Removal of or rendering inoperative exhaust sys-
tem components, including exhaust pipe clamp-
ing.
6. Removal of air intake system components.
General Information 00
Noise Emission Controls: 00–06
Saf-T-Liner C2 School Bus Maintenance Manual, May 2021 00/9

Verification of Inspections Log
The "Verification of Inspections Log" should be filled
out each time the noise emission controls on the ve-
hicle are maintained or repaired.
Verification of Inspections Log, Group 20
Verification of Inspections Log, Group 20, Engine Cooling/Radiator
Date Mileage Repair Description Cost Repair Facility
Verification of Inspections Log, Group 49
Verification of Inspections Log, Group 49, Exhaust
Date Mileage Repair Description Cost Repair Facility
General Information00
Verification of Inspections Log: 00–07
Saf-T-Liner C2 School Bus Maintenance Manual, May 202100/10