NHTSA ID Number: 10175409
Manufacturer Communication Number: SBW72-008REV
TSB/Document Date: 2020-05-23
Summary
Service Bulletin for Window Regulator Retrofit. The bulletin dated December 4, 2019 has been revised to include 4800 Models. Beginning 04/01/2019 Western Star
cab doors were updated to a new style regulator and window. When replacing an older style regulator or window the vehicle must be retrofitted to the new style regulator and window.
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TSB/Document ID: SBW72-008REV
Replacement Service Bulletin Number:
MFR Communication Date: 2020-05-22
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: VISIBILITY:POWER WINDOW DEVICES AND CONTROLS
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
72-008
Window Regulator Retrofit
Constellation
Heritage
> 4700 Models
> 4800 Models
> 4900
> 5700
5900
> 6900
Western Star
Service Bulletin
Models
Models
Models
Models
Description of Revisions: The bulletin dated December 4, 2019 has
been revised to include 4800 Models.
General Information
Beginning 04/01/2019 Western Star cab doors were updated to a new style regulator and window. When
replacing an older style regulator or window the vehicle must be retrofitted to the new style regulator and
window.
To replace the old style window regulator and glass window, the interior trim panel, regulator, and window glass
must first be removed.
Parts
Parts are available from the PDCs. See Table 1 for left-hand door replacement parts, and Table 2 for right-hand
door replacement parts.
Item Description
Regulator LH manual
Regulator LH power
LH Door Glass
Parts Required—LH Door
Part Number
A18-71372-000
A18-71371-000
18-71373-000
Qty
1
1
1
Table 1, Parts Required—LH Door
Item Description
Regulator RH manual
Regulator RH power
RH Door Glass
Parts Required—RH Door
Part Number
A18-71372-001
A18-71371-001
18-71373-001
Qty
1
1
1
Table 2, Parts Required—RH Door
Window Regulator Retrofit Instructions
Trim Panel and Window Glass Removal
1. Park the vehicle, shut down the engine, and apply the parking brakes. Chock the tires.
2. Pull the switches off the top of the upper door trim panel, then disconnect the wiring.
3. Remove the manual window crank handle, if equipped.
4. Remove the knob from the end of the lock rod.
5. Remove the four screws from the interior release handle. The handle must be held up to access two of the
screws. Leave the handle in place.
6. Remove the upper trim panel.
6.1
Remove the two screws from the bottom of the pull cup. See Fig. 1.
Western Star Service Bulletin, 05/20/2020
Page 1
72-008
Window Regulator Retrofit
Western Star
Service Bulletin
Constellation
Heritage
> 4700 Models
> 4800 Models
> 4900
> 5700
5900
> 6900
Models
Models
Models
Models
9
3
7
2
3
8
2
6
1
5
3
4
2
3
02/28/2012
f720743
NOTE: Door without a visibility window shown.
1. Map Pocket Panel
2. Screw, Long
3. Screw, Short
4. Lower Trim Panel
5. Upholstery Panel
6. Christmas Tree Fastener
7. Pull Cup
8. Upper Trim Panel
9. Door Structure
Fig. 1, Door Trim Panels, Vehicles Built From November 7, 2011—
6.2
Remove the three screws that attach the upper trim panel to the door.
6.3
Slide the upper trim panel up to disengage the hook (behind the lower rear corner of the panel) from
the door. Rotate the panel to allow the interior release handle to pass through the opening in the
panel. Remove the panel, leaving the interior release handle in place on the door.
7. Remove the map pocket panel.
7.1
Remove the screws that attach the map pocket panel to the lower trim panel and the door.
7.2
Disconnect the courtesy lamp wiring behind the pocket, then remove the pocket panel. See Fig. 2.
Page 2
Western Star Service Bulletin, 05/20/2020
72-008
Window Regulator Retrofit
Constellation
Heritage
> 4700 Models
> 4800 Models
> 4900
> 5700
5900
> 6900
Western Star
Service Bulletin
Models
Models
Models
Models
3
1
2
02/15/2012
f720744
1. Map Pocket Panel
2. Door Structure
3. Courtesy Lamp
Connector
Fig. 2, Courtesy Lamp Wiring Connector
8. Remove the screws that attach the lower trim panel to the door.
9. Remove the lower trim panel. See Fig. 3.
1
1
1
1
1
A
02/28/2012
B
1
A. Door Without a Visibility Window
1. Lower Trim Panel Screws
1
1
f720746
B. Door With a Visibility Window
Fig. 3, Lower Trim Panel Screw Locations
Western Star Service Bulletin, 05/20/2020
Page 3
72-008
Window Regulator Retrofit
Western Star
Service Bulletin
Constellation
Heritage
> 4700 Models
> 4800 Models
> 4900
> 5700
5900
> 6900
Models
Models
Models
Models
10. Remove the fir tree fasteners holding the center upholstery panel to the door then remove the panel.
11. Move the vapor barrier out of the way of the access holes. See Fig. 4.
10/11/2019
f720801
NOTE: The size and material of vapor barriers vary.
Fig. 4, Example of Vapor Barrier
12. Remove the inner and outer window scraper seals by prying them up. See Fig. 5.
1
f670113
05/15/2002
1. Scraper Seal
Fig. 5, Cab Door Window
13. Remove the top-window run channel seals by prying them out. See Fig. 6.
Page 4
Western Star Service Bulletin, 05/20/2020
72-008
Window Regulator Retrofit
Constellation
Heritage
> 4700 Models
> 4800 Models
> 4900
> 5700
5900
> 6900
Western Star
Service Bulletin
Models
Models
Models
Models
A
f670114
05/15/2002
Pry out the top-window run channel seals.
Fig. 6, Top Run Channels
14. If equipped, remove the upper mirror arm mounting-bracket screws and swing the arms to the side. See
Fig. 7. The lower arms do not need to be removed.
1
1
12/10/2019
f670115
1. Screws
Fig. 7, Upper Mirror Arm Mounting Screw Locations
15. Remove the regulator.
15.1
If the regulator is functional, crank or power the window down until the window mounting bolts are
aligned with the two access holes in the inner door skin. See Fig. 8.
Western Star Service Bulletin, 05/20/2020
Page 5
72-008
Window Regulator Retrofit
Western Star
Service Bulletin
Constellation
Heritage
> 4700 Models
> 4800 Models
> 4900
> 5700
5900
> 6900
Models
Models
Models
Models
1
05/14/2002
f601972
1. Window Mounting Access Holes
Fig. 8, Window Mounting
15.2
If the regulator is non-functional, access and remove the nuts holding the window to the regulator by
reaching through the cut-out for the visibility window or the hole for the door lock rods.
WARNING
Wear protective gloves and safety glasses when replacing window glass. Gloves will protect your hands
from sharp edges, and allow a better grip. Failure to wear gloves and safety glasses when handling
glass could result in injury to hands or eyes.
16. Through one of the door openings, hold the glass in place while removing the window mounting bolts. Slide
the glass up and place a padded C-clamp over the top of the door to hold the glass. See Fig. 9.
Page 6
Western Star Service Bulletin, 05/20/2020
72-008
Window Regulator Retrofit
Constellation
Heritage
> 4700 Models
> 4800 Models
> 4900
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