wheel size Ram 5500 Chassis Cab 2012 User Guide

Hour of manufacture. The bar code that appears on the
bottom of the label is your Vehicle Identification Number
(VIN).
Gross Vehicle Weight Rating (GVWR)
The GVWR is the total permissible weight of your vehicle
including driver, passengers, vehicle, options and cargo.
The label also specifies maximum capacities of front and
rear axle systems (GAWR). Total load must be limited so
GVWR and front and rear GAWR are not exceeded.
Payload
The payload of a vehicle is defined as the allowable load
weight a truck can carry, including the weight of the
driver, all passengers, options and cargo.
Gross Axle Weight Rating (GAWR)
The GAWR is the maximum permissible load on the front
and rear axles. The load must be distributed in the cargo
area so that the GAWR of each axle is not exceeded.Each axle GAWR is determined by the components in the
system with the lowest load carrying capacity (axle,
springs, tires or wheels). Heavier axles or suspension
components sometimes specified by purchasers for in-
creased durability does not necessarily increase the vehi-
cle’s GVWR.
Tire Size
The tire size on the Label represents the actual tire size on
your vehicle. Replacement tires must be equal to the load
capacity of this tire size.
Rim Size
This is the rim size that is appropriate for the tire size
listed.
Inflation Pressure
This is the cold tire inflation pressure for your vehicle for
all loading conditions up to full GAWR.
348 STARTING AND OPERATING

1. Tighten the wheel nuts in the numbered sequence to a
snug fit.
2. Retighten the wheel nuts in the same sequence to the
torques listed in the table. Go through the sequence a
second time to verify that specific torque has been
achieved. Retighten to specifications at 100 miles
(160 km) and after 500 miles (800 km).
It is recommended that wheel stud nuts be kept torqued
to specifications at all times. Torque wheel stud nuts to
specifications at each lubrication interval.Wheel Nut Torque
All wheel nuts should be tightened occasionally to elimi-
nate the possibility of wheel studs being sheared or the
bolt holes in the wheels becoming elongated. This is
especially important during the first few hundred miles/
kilometers of operation to allow the wheel nuts to
become properly set. All nuts should first be firmly
seated against the wheel. The nuts should then be
tightened to recommended torque. Tighten the nuts to
final torque in increments. Progress around the bolt
circle, tightening the nut opposite to the nut just previ-
ously tightened until final torque is achieved. Recom-
mended torques are shown in the following chart.
Disc Wheels TypeNut StudSize Hex Size TorqueFt LbsTorqueNewton-
Meters
Cone M14 x 1.5 22 mm 120-150 160-200
Flanged M14 x 1.5 22 mm 130-160 190-220
6
WHAT TO DO IN EMERGENCIES 391

8. Reach through the access hole of the wheel house
splash shield and lift the slide lock upward far enough to
disengage it from the lock post on the back of the front
lamp unit housing.
9. Remove the headlamp assembly. Grasp the outboard
edge of the lamp and pull it straight forward to disen-
gage the ball stud from the plastic grommet.10. Disconnect electrical connectors.
11. Replace bulb(s) as necessary.
CAUTION!
•Do not contaminate the bulb glass by touching it
with your fingers or by allowing it to contact other
oily surfaces. Shortened bulb life will result.
•Always use the correct bulb size and type for
replacement. An incorrect bulb size or type may
overheat and cause damage to the lamp, the bulb
socket, or the lamp wiring.
NOTE:There are access covers over both headlamp
bulb access holes in the quad front lamp unit housing (if
equipped). These covers MUST be reinstalled after the
bulb has been replaced.
448 MAINTAINING YOUR VEHICLE

Supplemental Tire Pressure Information........ 336
Synthetic Engine Oil...................... 412
System, Remote Starting.................... 26
Tachometer............................ 190
Temperature Control, Automatic (ATC)........ 267
Temperature Gauge, Engine Coolant.......... 190
Tether Anchor, Child Restraint............. 69,74
Tilt Steering Column..................... 157
Tip Start.............................. 280
Tire and Loading Information Placard......320,336
Tire Identification Number (TIN)............. 318
Tire Markings.......................... 315
Tire Safety Information.................... 315
Tires ............................ 82,324,483
Aging(LifeofTires) .................. 334
Air Pressure........................ 324
Chains............................ 336
Compact Spare...................... 331Dual...........................340,388
General Information.................. 324
High Speed......................... 329
Inflation Pressures.................... 325
LifeofTires ........................ 334
Load Capacity....................320,321
Quality Grading..................... 483
Radial............................ 330
Replacement........................ 334
Rotation........................... 339
Safety..........................315,324
Sizes ............................. 316
Snow Tires......................... 338
Spinning ........................... 333
Steel Carcass Ply..................... 327
Tread Wear Indicators................. 333
Wheel Nut Torque.................... 386
Tongue Weight/Trailer Weight.............. 354
Torque Converter Clutch.................. 293
500 INDEX