2018 Ram 3500 Chassis Cab air conditioning

•Maintain engine coolant (antifreeze) concentration at a
minimum of 50% OAT coolant (conforming to
MS.90032) and distilled water for proper corrosion pro-
tection of your engine which contains aluminum com-
ponents.
• Make sure that the coolant expansion bottle overflow
hoses are not kinked or obstructed.
• Keep the front of the radiator clean. If your vehicle is
equipped with air conditioning, keep the front of the
condenser clean.
• Do not change the thermostat for Summer or Winter
operation. If replacement is ever necessary, install ONLY
the correct type thermostat. Other designs may result in
unsatisfactory engine coolant (antifreeze) performance,
poor gas mileage, and increased emissions.
Brake System
In order to assure brake system performance, all brake
system components should be inspected periodically. Refer
to the “Maintenance Plan” in this section for the proper
maintenance intervals.
WARNING!
Riding the brakes can lead to brake failure and possi-
bly a collision. Driving with your foot resting or riding
on the brake pedal can result in abnormally high brake
temperatures, excessive lining wear, and possible
brake damage. You would not have your full braking
capacity in an emergency.
Fluid Level Check — Brake Master Cylinder
The fluid level of the master cylinder should be checked
when performing under the hood service or immediately if
the brake system warning lamp indicates system failure.
The brake master cylinder has a translucent plastic reser-
voir. On the outboard side of the reservoir, there is a
“MAX” mark and a “MIN” mark. The fluid level must be
kept within these two marks. Do not add fluid above the
MAX mark because leakage may occur at the cap.
With disc brakes the fluid level can be expected to fall as
the brake linings wear. However, an unexpected drop in
fluid level may be caused by a leak and a system check
should be conducted.
386 SERVICING AND MAINTENANCE

Sustained high temperature can cause the material of
the tire to degenerate and reduce tire life, and excessive
temperature can lead to sudden tire failure. The grade C
corresponds to a level of performance, which all pas-
senger vehicle tires must meet under the Federal Motor
Vehicle Safety Standard No. 109. Grades B and A
represent higher levels of performance on the laboratory
test wheel, than the minimum required by law.
WARNING!
The temperature grade for this tire is established for
a tire that is properly inflated and not overloaded.
Excessive speed, under-inflation, or excessive load-
ing, either separately or in combination, can cause
heat buildup and possible tire failure.
STORING THE VEHICLE
If you are storing your vehicle for more than 21 days, we
recommend that you take the following steps to minimize
the drain on your vehicle’s battery:
• Disconnect the negative cable from battery.
• Any time you store your vehicle or keep it out of service
(i.e., vacation) for two weeks or more, run the air
conditioning system at idle for about five minutes in the fresh air and high blower setting. This will ensure
adequate system lubrication to minimize the possibility
of compressor damage when the system is started again.
BODYWORK
Protection From Atmospheric Agents
Vehicle body care requirements vary according to geo-
graphic locations and usage. Chemicals that make roads
passable in snow and ice and those that are sprayed on
trees and road surfaces during other seasons are highly
corrosive to the metal in your vehicle. Outside parking,
which exposes your vehicle to airborne contaminants, road
surfaces on which the vehicle is operated, extreme hot or
cold weather and other extreme conditions will have an
adverse effect on paint, metal trim, and underbody protec-
tion.
The following maintenance recommendations will enable
you to obtain maximum benefit from the corrosion resis-
tance built into your vehicle.
What Causes Corrosion?
Corrosion is the result of deterioration or removal of paint
and protective coatings from your vehicle.
8
SERVICING AND MAINTENANCE 417

Adding Engine Coolant (Antifreeze).............383
Adding Fuel ............................. .287
Additives, Fuel ........................ .288, 428
Adjust Down .............................. .45, 46
Forward ............................ .44, 46
Rearward ........................... .44, 46
Up ................................ .45, 46
Adjustable Pedals ...........................57
Air Bag Air Bag Operation ....................... .196
Air Bag Warning Light .....................193
Enhanced Accident Response .............203, 353
Event Data Recorder (EDR) .................353
If A Deployment Occurs ....................201
Knee Impact Bolsters ..................... .197
Maintaining Your Air Bag System .............203
Transporting Pets ....................... .230
Air Bag Light ...................... .147, 193, 232
Air Bag Maintenance ....................... .203
Air Cleaner, Engine (Engine Air Cleaner Filter) ......366
Air Conditioner Maintenance ..................369
Air Conditioning ............................80
Air Conditioning Filter ....................94, 370
Air Conditioning, Operating Tips ................93Air Conditioning Refrigerant
...............369, 370
Air Conditioning System ...................92, 369
Air Filter ............................... .366
Air Pressure, Tires ......................... .403
Alarm, Panic ...............................22
Alarm (Security Alarm) ....................33, 148
Alarm System (Security Alarm) .................33
Alterations/Modifications, Vehicle ................7
Antifreeze (Engine Coolant) ...................382
Capacities ............................. .432
Disposal .............................. .385
Anti-Lock Brake System (ABS) .................160
Anti-Lock Warning Light .....................153
Ashtray ................................ .123
Assist,

Hill Start .......................... .162
Audio Systems (Radio) ...................... .439
Auto Down Power Windows ...................96
Automatic Door Locks ........................39
Automatic Headlights ........................70
Automatic High Beams .......................69
Automatic Temperature Control (ATC) ............92
Automatic Transmission Adding Fluid .......................... .389
Fluid And Filter Changes ...................390
Fluid Level Check .....................387, 388
510 INDEX

Exterior Lights......................... .67, 234
Filters Air Cleaner ............................ .366
Air Conditioning ..................... .94, 370
Engine Fuel ........................... .433
Engine Oil ......................... .366, 433
Engine Oil Disposal ...................... .366
Flashers Turn Signal ...................... .73, 155, 234
Flash-To-Pass ..............................70
Flat Tire Stowage .......................... .342
Flooded Engine Starting ..................... .241
Fluid, Brake ............................. .435
Fluid Capacities ........................... .432
Fluid Leaks .............................. .234
Fluid Level Checks Automatic Transmission ....................388
Brake ................................ .386
Power Steering ......................... .267
Fluids And Lubricants ...................... .433
Fog Lights ......................... .72, 154, 326
Fold Flat Load Floor ........................113
Folding Rear Seat ...........................41
Four-Way Hazard Flasher .....................318 Four Wheel Drive
......................... .255
Freeing A Stuck Vehicle ..................... .348
Front Axle (Differential) ..................... .390
Fuel ................................... .428
Adding .............................. .287
Additives .......................... .288, 428
Clean Air ............................. .428
Ethanol .............................. .429
Filler Cap (Gas Cap) ..................... .288
Filter ................................ .433
Gasoline .............................. .428
Light ................................ .153
Materials Added ..................... .288, 428
Methanol ............................. .429
Octane

Rating .......................... .428
Requirements .......................... .428
Tank Capacity .......................... .432
Fuses .................................. .329
Garage Door Opener (HomeLink) ............99, 105
Gas Cap (Fuel Filler Cap) .....................288
Gasoline, Clean Air ........................ .428
Gasoline, Reformulated ..................... .428
Gear Ranges ............................. .247
Gear Select Lever Override ....................347
514 INDEX