Peterbilt Rear Air Adjustment Service Manual

FIELD

SERVICE

BULLETIN

Date: File

Group:

ATTENTION: Setting/Adiusting

This

bulletin is exceot FLEX AirrM Trac

suspensions. lt

on those vehicles.

.

This

bulletin Spring Height nance manual updated in

The

ride height

used

are designed to

teristics. There

been

are occasions when

put

in

service. Peterbilt recommends

'

Changing the ride height results tion can lead

'

Changing result in

April7,2004 03 Section: ServiceManager

RearAxle Angles:

applicable to vehicles

suspensions;

provides a procedure

supersedes the information

(Ride

the near future

proprietary

of

to driveline vibration.

ride

the

complaints

Height)" in

for vehicles

to reflect the

rear

provide

height may

the vehicle

a customer will

rough

of

Rear

Suspension

Proprietary

equipped with

i.e., Air Leaf,

to set ride height

"Measuring

on

Section 6,

equipped

air suspensions

with the best

in

a change in rear

have

a detrimental effect

ride.

"Rear

as described

changes made

reset or

against this for

A DIVISION OF

Distribution /Dealer Principal lWarranly Manager /Parls Manager

/Sales Manager

RearAir

Low Air Leaf, Low

adjust the ride height

Susoensions Except FLEXA|TTM

proprietary

and adjust rear

Pinion Angle"

Suspension" of the master mainte-

above. The manual will

by this bulletin.

is set

at the

possible

following

the

axle driveline

on axle travel, and may

rear

air suspensions

Low Air Leaf, and Air

and

factory.

axle travel

The specifications

and

after a

reasons:

angles.

ilqN

Copy:

axle angles

"Setting

ride

vehicle has

This

Air

be

charac-

situa-

also

Peterbilt

by maintaining angle(s) cedure that removes on 6/26199 and interaxle cellation as well supporting information

for

this

Parts

The using normal

recommends

the ride height

should be returned

(Denton)

driveshaft angles

as keep torsional

procedure

Notes

parts

referred

is available from

to in

ordering

that

the and 814199

is

procedure.

Part Number

+z-uuz]v-uu1

-002,

J3-U6 /6U-0U1

Pro

3600 Anglemaster

PS803035

,

-003, -004

customers be

at the factory

to the original factory

effect of

contained in

this bulletin are listed

frame

(Madison).

provide

to

acceleration

PACCAR Parts

Kroe Axle Inclinometer (available

http://www.

encouraged

rake variation

Using this method

the best

this bulletin. The

nergnr roor (gauge)

(for

shim

penntoolco.

F.S.B.

# 3-00R

to avoid these

setting.

within

below

When necessary

specification. A new

pinion

on

permits

possible

specifications. The

(see

and available from PACCAR

axle travel

special ride height

Parts

Notes below).

Description

Low Air

Leaf

suspensions on/after 415104)

at

com/cataloq/products/697.

potential problems

rear

the

adjustment

angles was implemented

setting

and U-joint can-

rear

procedure

tool required

Page

axle

pro-

driver

and

Parts

cfm)

1 of 42

Setting and Adjusting Ride

Height and Rear Axle Angles

WARNING!

This mission in neutral parked

on both

on a completely

sides.

Failure

vehicle rolling into

ble serious

personal

NOTE: Suitable wheel

Follow

1.

Ensure that

.

Ride height tool

.

Pro-3600

.

Adapter for Anglemaster

2.

Drive the vehicle

cle and slowly

procedure

this

or

to set ride height

following

the

(gauge)

Pro-360 Anglemaster

onto a

drive back onto the flaUlevel

transmission in neutral

3. Chock the front wheels

4. Release Ensure

5.

the vehicle

parking

the

brakes.

that the ride height

"NOTES"

(see

procedure

and the

requires

parking

flaUlevel

to adequately

someone/something,

injury

and/or equipment

chocks are at a minimum

and adjust

tools are available:

(inclinometer)

flaUlevel

and set the

surface. Back

parking

on both sides.

gauge

in Figure

has

the correct slide installed for

1).

seruicing

brakes

released. The vehicle must

surface with

chock the

vehicle with

the

front wheels

both

wheels may lead

causing an accident and

damage.

18-inch

an

rear

axle angles

straight out for the

(46

(pinion

length

surface. Gently roll to a stop.

brakes.

the suspension

the trans-

chocked

to the

possi-

long 4x4

cm)

angles).

of the

Place

be

vehi-

the

on

LOW AIR LEAF axle conirgurations burll on & atter 4/904) and LOWLOWAIR

Lol^/ AIR LEAF (includes conliguralons built belore 4/5/04)

Figure

(Srngle

Srngle

U\

1 lllustration

-3t MOVE GAGE UNDER RAIL BETWEEN TANDEMS ANO

RAISE SLIDE TO CONTACT BOTTOi' FI-ANGE

,/

SOUEEZ E TABS TO

SLIDE POINTER

TIGHTEN WING NUT

TO HOLD POINTER

POSITION

l

DOES PROPER INDICATOR

APPEAR IN TOLEMNCE AOX?

YES.

G@D

NO - ADJUST BIDE HEIGHT

LooK HERE TO INDICATOR GROOVE PER SI.JSPENSION

o

1) PLACE BASE ON LEVEL GROUNO NEAR REAR REAR AXLE

Ride Height

of

GROOVE

APPLY PN, REV LEVEL AND

SUPPLIER CODE

DETERMINE PROPER

1 ,42d218-001. 2 42{n'217 3

142{0216{01,

n

lseecen

"tr-t@

BASE

-0o1,SLIDE

(ALTERMTE POINTER .zso' ALuMTNUM TUBTNG, 4-1l,16'

lwr

Gauge

----->

2) AL|GN POTNTER W|TH AXLE HUB HOLE

NOTES:

1) WITH

AIR LEAF, AIR TRAC, LOW AIR LEAF

AND LOW LOW AIR LEAF USE STANDARD

42-0021

sLIDE

2) WITH

-USE ALTERNATE SLIDE 42.OO22O.OO1

wrTH

3) SPACER OUTER TUBE OF ITEM 1

4) DASH VARIATION

MATERIAL LIST

SLTDE 42-00220-001, SEE NOTES 1 AND 2)

7-001

REYCO 1O2AR AND NEWAY AIR SUSPENSIONS

ASSEMBLY

42-00219-001

(ITEM

4)

LOOSE IN

SITS

INDICATES TOOL NUMBER

LoNG)

)

BOTTOM OF

(NOT

INCLUDED

Page2

of

42

F.S.B. # 3-00R PS803035

6.7.Place ground

Align the

ride height

the

(see

Figure

pointer

gauge

1 and Figure 2

of the

gauge

near

rearmost

the

axle such that

).

with the axle hub hole

(see

the base

Figure 2).

is

on

level

a. Squeeze the tabs to slide b. Tighten the wing nut

ALIGN POINTER WITH AXLE HUB HOLE

to

hold

the

,-

pointer

-->

proper position.

into

in that

position.

Figure

PS803035

2 lllustration

Aligning The

of

Pointer of a Ride Height

F.S.B.

# 3-00R Page

Gauge

3 of

42

8. Move the ride height not forward

of the suspension

gauge

under the frame rail,

bracket) or between

either

forward

tandem axles

of a single axle

(see

Figure 3).

(but

Figure 3 lllustration

9. Raise the slide

of Measuring The

to bring the magnet

frame rail.

Page

4 ot 42

Ride Height

its

at

F.S.B.

into

tip

# 3-00R

Tandem

on a

contact with

Suspension

the bottom

flange

PS803035

of the

10. Look in .

.

lf lf

the the

MAGNET

proper proper

the tolerance box

,\

,/

groove groove

.)

/

,/

appears, skip to doesn't appear,

MOVEGAGEUNDERRAILBETWEENTANDEMS

AND RAISE SLIDE TO

note

and

what indicator

Step

perform

COMTACT BOTTOM FLANGE

groove

16

in this

procedure.

all remaining

appears

(see

steps in this

Figure 4).

procedure.

LOW AIF axle conliguraions buill on & after 4/5/G) and

LOWLOWAIR

(Srngle

LEAF

LOW AIR LEAF

(nrcludes

Single a) configuralons burll belore 4/Y04)

";1\

DOES PROPER INOICATOR

APPEAR IN TOLEMNCE BOX?

YES. NO.

ADJUST RIDE HEIGHT

.|

f

G@D

orr/il

Figure 4 lllustration

11.Loosen for

the fasteners

illustrations

NOTE:

At least

be slotted

of

permit

to

of

height

GROOVE

LOOK HERE TO OETERMINE PROPER INOICATOR

GROOVE PER SUSPENSIoi']

Checking Ride Height lndicator

mounting

the height control valve

control valves.

one of the mounting holes

rotating

the valve.

in the height

to its bracket.

control

valve

Figure5

See

bracket will

12.Rotate height

13.When

the valve

as measured

at the the neutral dowel.

14.Torque

the mounting

15. Remove

PS803035

either clockwise

with the ride height

appropriate ride height,

position,

then install either

fasteners to

the alignment

or dowel.

or counterclockwise

gauge.

ensure that

the built-in

55 - 75 Lb. in.

F.S.B.

# 3-00R

the height control valve lever is in

alignment

-

(6.2

to obtain the appropriate ride

or a 1/8-inch

(3

mm)

8.5 N.m.).

Page

5 of 42

NEWAY

INTAKE

CONTROLT

ARM

EXHAUST\

HEIGHT

CONTROL

VALVE

ADJUSTING LOCK

NUT

3t16"

ROO

EXHAUST

,,IN''

AIR SUPPLY

INTAKE

EXHAUST

€XHAUST

..IN"

AIR

.,OUT"

AIR

SPRING

HADLEY

\

SUPPLY

T

BOTTOM

HEIGXT

80770M

CONTROL

ADJUSTING

VALVE

AIUUSTING LOCK NUT

LOCK

ALIGNMENT

.

7tE',

ROD

Figure

Page

6 of

5 lllustrations

42

of Height ControlValves

F.S.B.

# 3-00R

PS803035

[Tl LU

NOTE:

axle

angle

Contact PACCAR

information

for newer

Pafts Research

vehicles whose

(1-800-477-0251)

records

to obtain rear not

are

yet

in

ECAT.

16.Obtain

the

tion is located in

. .

F.S.B.

See Refer to Figure

specified forward rear

vehicle's

the

#4-92R

for instructions

record

6 and Figure 7 for

axle

angle

in ECAT.

to read rear

examples

of

from

the vehicle's FCBM.

axle angle information. rear

axle angle bills.

This informa-

Figure

PS803035

6 Example

of

Rear

Axle Angle Information

F.S.B.

# 3-00R

(Parallel

Bill

Axle

Configuration)

PageT

of 42

Figure

7 Example Rear

Axle Angle Information

Bill

(Broken-back

Axle Configuration)

17.Zero inboard

Figure

Page

8 lllustration

8 of 42

the inclinometer

(i.e.,

toward the

to the LH frame rail with

Inclinometer

of

passenger

side of the chassis)

on the Left-Hand Frame

F.S.B.

the face

of the inclinometer oriented

as shown in Figure 8 .

Rail

# 3-00R PS803035

iB.Measure

and record the forwarci housrng, near ented

inboard

the

axle seat, on the long

as

shown

in Fioure

rear axle

side of

9 .

angie

at either the

ihe axle, with

top

or bottom of the

inclinometer

the

ori-

Figure

\

I lllustration

of Using an Inclinometer

\ rb

/

to Determine Forward

Rear Axle Angle

.#

l9.Compare

'

lf

the angle is within t

tions)

the forward rear

proceed

or

NOTE:

' '

.

lf the

"

repeat

20.Turn

PS803035

angle difters by more

Steps 11 through 18.

inclinometer

the

NOTE: lf

will maoe relative to lrue horizontal.

axle angle

0.5 degree of

to Step 20

Shinirning may not

(for

tandem

be requireci if adjusting the ride height Ensure ment so

that the specified ride

that a

valid

inclination measurement

|e4s_l'/qteo

than t 0.5

off, then back

frame rake

be different from

to the frame rail,

exists, the measurement

the one

you

obtained

that value, either

axle configurations).

the

within the

height is

to the

proper

tolerance window.

maintained

degree from

(this

on

you

while this measurement

F.S

B. # 3-00R

wiil zero it

obtaineci in Step 18. That measurement

value

stop

listed in the FCBM:

(for

single axle configura-

axle angle can be obtained

during axle angle adjust-

is

achieved.

value,

the

shim the axle, then

to true horizontal).

you

that

obtain in the next step is

beinq

by

was

made relative

Page

I of

42

21. Remeasure zontal)

and record the forward rear

at either the top

of the axle, with

or bottom of the housing, near

inclinometer

the

axle angle

oriented inboard

as shown in Figure 9 .

(now

with respect

to the true hori-

the axle seat, on the long side

22.Measure the axle seat, or

and record the rear rear

at the bottom of the housing, next

of the axle with the inclinometer

axle angle either

oriented inboard

as shown

at the top of the housing,

to the axle clamp, on the long side

in Figure 10 .

Figure

10 lllustration

parallel

For

a.

rear

axle angle

of Using an Inclinometer

axle configurations:

than + 0.5 degree,

b. For

broken-back axle

Step 21) in

the chart for the

the rear rear

axle angle is within

outside the range,

Administrative

Peterbilt labor

rate

This

bulletin supersedes F.S.B.

Notes

pay

will

for

(Operation

axle angle

No.

Indicates revision

Page

1O of 42

you

obtained in

shim the rear rear

configurations: Locate

applicable axle included

shim the rear rear

adjustment on warrantable

032-2 or

033-2 applies).

#3-00R

to Determine Rear

Compare the rear rear

Step 21 . lf

axle until its

the

rear

rear axle angle

angle

the foruyard rear

the range

axle until its

specified for the rear driver. lf value is

angle

dated March 30, 2001.

F.S.B.

# 3-00R

Rear Axle Angle

axle angle to the forward

more

(from

is within

axle angle

differs by

that tolerance.

in this bulletin. Determine if

is within

units as

that range.

per

the established

PS803035

to

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Page

13

42

of

Peterbilt Rear Air Adjustment Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual