Peterbilt FIELD wiring diagrams
1-02
FIELD SERVICE
BULLETIN
Date: January 9, 2002
File Group: 03 Section: Rear Suspension
ATTENTION: Service Manager
Revised Installation of Height Control Valve for FLEX Air™ Rear Suspension
This bulletin is applicable to all vehicles built on and after December 17, 2001 and
equipped with a FLEX Air™ rear suspension. It summarizes the changes in the mounting
of the height control valve (HCV) for this suspension.
.
NOTE: No changes to valve plumbing or servicing procedures are caused as
a result of this revised HCV installation. Similarly, the procedure for setting and
adjusting ride height and pinion angles on the above vehicles is the same as
currently presented in F.S.B.#6-01 and Section 6. "Rear Suspension" in the
master maintenance manual.
A design improvement that enhances the overall FLEX Air suspension installation was
implemented in production on December 17, 2001. The location and orientation of the
HCV mounting bracket was changed so that future FLEX Air suspensions will now use
the same HCV/bracket assembly as do all other Peterbilt proprietary rear air suspensions (see Parts Notes below). Figures 1 through 4 illustrate these changes:
Distribution Copy:
✓ Dealer Principal
✓ Warranty Manager
✓ Parts Manager
✓ Sales Manager
• Figure 1 and Figure 2 illustrate the original and revised HCV mounting bracket locations, respectively. The bracket is now inverted (the bracket leg now faces forward)
and is mounted higher on the frame rail to clear the lower flange of the frame rail.
[NOTE: Because of this change in mounting height, the vehicles noted above require
a new, longer HCV link assembly (see Parts Notes below).]
• Figure 3 and Figure 4 illustrate the reversing of the orientation of the HCV bracket
mounting bolts. Bolts are now installed “nut-side out” to prevent interference between
the bolt and an air bag installation tool (90-degree air ratchet).
Parts Notes
1. The parts mentioned in this bulletin are summarized below and are available from
PACCAR Parts using normal ordering procedure:
Item Description
Before 12/17/01 On and After 12/17/01
FLEX Air HCV Mounting Bracket 08-03239-013/014 08-03239-003/004
FLEX Air HCV Link Assembly 48100225 32063
Part Number
PS803038 F.S.B. # 1-02 Page 1 of 3
Bracket Leg Faces Aft
08-03239-013/014
03-05182 (48100225)
Figure 1 Illustration of FLEX Air HCV Mounting Bracket Installation Before 12/17/01
Bracket Leg Faces Forward
08-03239-003/004
32063
Bracket Is Raised 55 mm To Clear
Lower Flange Of Frame Rail
NOTE: Because of this change in mounting
height, a longer HCV link assembly is now
required (see Parts Notes).
Figure 2 Illustration of FLEX Air HCV Mounting Bracket Installation On And After 12/17/01
Page 2 of 3 F.S.B. # 1-02 PS803038
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