air conditioning Ram 2500 (Diesel) 2007 User Guide

•Up Steep Hills —
select a lower transmission gear, but try and keep the
torque converter locked.
•Air Conditioning —
turn it off temporarily.
Do Not Operate The Engine With Low Oil
Pressure
When the engine is at normal operating temperature, the
minimum oil pressures required are:
Idle 700 to 800 RPM............... 10psi(69kPa)
Full speed and load.............. 30psi(207 kPa)
CAUTION!
If oil pressure falls to less than normal readings, shut
the engine off immediately. Failure to do so could
result in immediate and severe engine damage.
Do Not Operate The Engine With Failed Parts
Practically all failures give some warning before the parts
fail. Be on the alert for changes in performance, sounds,
and visual evidence that the engine requires service.
Some important clues are:
•engine misfiring or vibrating severely
•sudden loss of power
•unusual engine noises
•fuel, oil or coolant leaks
•sudden change, outside the normal operating range, in
the engine operating temperature
•excessive smoke
•oil pressure drop
STARTING AND OPERATING 289
5

Towing Tips — Electronic Speed Control (If
Equipped)

Don’t use in hilly terrain or with heavy loads.
When using the speed control, if you experience speed
drops greater than 10 mph (16 km/h), disengage until
you can get back to cruising speed.
Use speed control in flat terrain and with light loads to
maximize fuel efficiency.
Towing Tips — Cooling System
To reduce potential for engine and transmission over-
heating, take the following actions:
City Driving
When stopped for short periods of time, put transmission
in neutral and increase engine idle speed.
Highway Driving
Reduce speed.
Air Conditioning
Turn off temporarily.
refer to Cooling System Operating information in the
Maintenance section of this manual for more informa-
tion.
Trailer Towing Mirrors — If Equipped
These mirrors are designed with an adjustable mirror
head to provide a greater vision range when towing
extra-wide loads. To change position inboard or out-
board, the mirror head should be rotated (flipped Out or
In). A small blindspot mirror is integrated onto the main
mirror surface.
STARTING AND OPERATING 371
5

WARNING!
•Use only refrigerants and compressor lubricants
approved by the manufacturer for your air condi-
tioning system. Some unapproved refrigerants are
flammable and can explode, injuring you. Other
unapproved refrigerants or lubricants can cause
the system to fail, requiring costly repairs. Refer to
Section 3 of the Warranty Information book for
further warranty information.
•The air conditioning system contains refrigerant
under high pressure. To avoid risk of personal
injury or damage to the system, adding refrigerant
or any repair requiring lines to be disconnected
should be done by an experienced repairman.
Refrigerant Recovery and Recycling
R-134a Air Conditioning Refrigerant is a hydrofluorocar-
bon (HFC) that is endorsed by the Environmental Pro-
tection Agency and is an ozone-saving product. How-
ever, the manufacturer recommends that air conditioning
service be performed by dealers or other service facilities
using recovery and recycling equipment.
Power Steering — Fluid Check
Checking the power steering fluid level at a defined
service interval is not required. The fluid should only be
checked if a leak is suspected, abnormal noises are
apparent, and/or the system is not functioning as antici-
pated. Coordinate inspection efforts through a certified
DaimlerChrysler Dealership.
MAINTAINING YOUR VEHICLE 439
7

•Keep the front of the radiator clean. If your vehicle is
equipped with air conditioning, keep the front of the
condenser clean, also.
•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 coolant performance, poor gas
mileage, and increased emissions.
Fan
Inspection
Check the fan for cracks and bent or broken blades. If any
of these conditions exist, you must replace the fan. Make
sure it is securely mounted.
NOTE:This service procedure must be performed by a
trained service technician. Make arrangements with your
authorized Dodge Truck Dealer for this inspection.
Charge Air Cooler (Inter-Cooler)
The charge air cooler is positioned between the radiator
and the air conditioner condenser. Air enters the engine
through the air cleaner and passes through the turbo-
charger where it is pressurized. This pressurized air
rapidly reaches high temperature. The air is then directed
through a hose to the charge air cooler and through
another hose to the intake manifold of the engine. The air
entering the engine has been cooled by about 50 to 100
degrees Fahrenheit. This cooling process enables more
efficient burning of fuel resulting in fewer emissions.
To guarantee optimum performance of the system, keep
the surfaces of the charge air cooler, condenser and
radiator clean and free of debris. Periodically check the
hoses leading to and from the charge air cooler for cracks
or loose clamps resulting in loss of pressure and reduced
engine performance.
450 MAINTAINING YOUR VEHICLE

•Anytime 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
insure adequate system lubrication to minimize the
possibility of compressor damage when the system is
started again.
NOTE:When reinstalling the IOD fuse push firmly until
fully seated, the gages in the Instrument Cluster will do
a full sweep, when the ignition key is cycled to RUN. This
is a normal condition.
REPLACEMENT LIGHT BULBS
LIGHT BULBS — Inside Bulb No.
Overhead Console Lights............... TS212-2
Dome Light............................7679
All of the inside bulbs are brass or glass wedge base.
Aluminum base bulbs are not approved.LIGHT BULBS — Outside Bulb No.
Back-Up..............................3057
Center High Mounted Stop Lamp............. 912
Fog Lamp...........................9006LL
Headlamp (Halogen)..................... H13
Side Marker Bulb....................... W5W
Park & Turn Signal...................3157NAK
Rear License Plate Lamp................... 168
Rear Cargo Light......................... 912
Tail & Stop............................3057
Cab Clearance Lights...................... 168
Dual Rear Wheel Sidemarker Light............ 168
Dual Rear Wheel Tailgate ID Lights (3)......... 168
MAINTAINING YOUR VEHICLE 473
7

Adding Fuel........................... 352
Adjustable Pedals....................... 138
Air Cleaner, Engine
(Engine Air Cleaner Filter)............422,424,460
Air Conditioner Maintenance............... 438
Air Conditioning Refrigerant.............438,439
Air Conditioning System................259,438
Air Conditioning System, Zone Control........ 262
AirFilter ...........................422,424
Air Pressure, Tires....................335,343
Airbag.............................. 46,52
Airbag Light......................... 77,199
Airbag On/Off Switch..................... 52
Airbag, Side............................ 55
Alarm, Out of Park Sense...............296,302
Alarm, Panic............................ 23
Alarm (Security Alarm)................. 18,201
Alarm System (Security Alarm)............... 18
Alignment and Balance................... 342Alterations/Modifications, Vehicle............. 8
Antenna, Satellite Radio................... 252
Antifreeze (Engine Coolant)..............446,447
Capacities........................... 487
Anti-Lock Warning Light...............204,324
Anti-Theft Security Alarm (Theft Alarm)........ 18
Anti-Theft System..................... 18,201
Appearance Care........................ 463
Ashtray............................... 171
AutomaticDimmingMirror ................. 85
Automatic Door Locks.................... 153
Automatic Transaxle...................... 12
Interlock System........................ 15
Automatic Transmission................... 455
Adding Fluid......................... 456
Fluid and Filter Changes................. 457
Fluid Level Check...................... 455
FluidType ........................457,491
Shift Indicator........................ 201
534 INDEX