ISSUE DATE:
SERVICE BULLETIN SUBJECT:
VINs or MODELS AFFECTED:
COMPLETE BY:
SERVICE BULLETIN #:

7-27-2020
Driver’s Barrier Door Stanchion Mount Retrofit
Service Specified Buses
Next Service Opportunity
SC-20-105

NOTICE! It is expected that this process will require 4 hours per bus. Please
schedule appropriately to minimize vehicle downtime.

DRIVER’S BARRIER DOOR STANCHION MOUNT UPDATE
Retrofit Description:

This procedure updates the driver’s barrier stanchion mount to a more robust design.

Headquarters: 1815 Rollins Road, Burlingame, CA 94010
East Coast Manufacturing: 1 Whitlee Court, Greenville, SC 29607
West Coast Manufacturing: 383 Cheryl Lane, City of Industry, CA 91789

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Tools/Parts Required
Tools and Supplies Required:
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•
•
•
•
•
•
•
•
•
•
•
•
•

Ratchet
1/2-Inch Socket
Chisel
Permanent Marker
Power Drill
9mm Drill Bit
10mm Drill Bit
21/32 Drill Bit
Mixing Cup
Tongue Depressor
Plexus Gun
36-Grit Sanding Disk
Isopropyl Alcohol
Shop Towels

Kit Parts Required:
•

054731
KIT, AROW BARRIER DEBONDING RETROFIT (Consisting of)
o 112-5492
BRACKET, DRIVERS BARRIER, RETRO
o 019657
INSERT, POTTED, M8-1.25X16 (WITTEN)
o 005443-002 BOLT,HEX,FLANGE, CLASS 10.9, M8-1.25X16X16
o 018362
PLEXUS, MA-530

1 EA
3 EA
3 EA
1 EA

Parts Required but not included in kit:
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•
•
•
•

009479
027017
009499
043223
020990

RESIN, EPOXY, WEST SYSTEMS
FILLER, HIGH DENSITY, WEST SYSTEMS
HARDENER, EPOXY, FAST, WEST SYSTEMS
EQUIPMENT, SERVICE, WEST SYSTEM MINI PUMP
PRIMER,COND.,0-RMD,PLE QT.IP120 PC 120

Headquarters: 1815 Rollins Road, Burlingame, CA 94010
East Coast Manufacturing: 1 Whitlee Court, Greenville, SC 29607
West Coast Manufacturing: 383 Cheryl Lane, City of Industry, CA 91789

1 EA
1 EA
1 EA
1 EA
1 EA

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Procedure
1. Perform the Proterra approved Lockout/Tagout procedure to make the bus safe for work.
2. Using a 1/2-Inch Ratchet/Socket, remove the Driver’s Barrier Stanchion from the bus.

Stanchion

3. Using a Chisel, carefully remove the nut plate from the floor.

Headquarters: 1815 Rollins Road, Burlingame, CA 94010
East Coast Manufacturing: 1 Whitlee Court, Greenville, SC 29607
West Coast Manufacturing: 383 Cheryl Lane, City of Industry, CA 91789

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4. Prepare the area where the nut plate was removed by removing all Plexus, the flooring, and
yellow trim.
5. Place the new Bracket (112-5492) in the position shown in the following illustration.

6. Using a Permanent Marker, mark the four holes on the vertical portion of the bracket
for drilling.
7. Using a Power Drill with a 9mm Drill Bit, drill a hole that is at least 15mm deep in each
of the marked locations. These will be clearance holes for the stanchion fasteners.
8. Place the Bracket (112-5492) back into position over the drilled holes.

Headquarters: 1815 Rollins Road, Burlingame, CA 94010
East Coast Manufacturing: 1 Whitlee Court, Greenville, SC 29607
West Coast Manufacturing: 383 Cheryl Lane, City of Industry, CA 91789

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9. Using a Permanent Marker, mark the three holes shown by the red x-marks in the
previous illustration.
10. Remove the Bracket (112-5492) in preparation for drilling.
11. Using a Power Drill with a 10mm Drill Bit, drill pilot holes in the marked locations. The
holes should be 26mm deep.
12. Using a Power Drill and a 21/32-Inch Drill Bit, enlarge the holes to their final size and 26mm
depth.

13. Mix West Systems 105 Epoxy Resin with West Systems 205 Hardener to get the amount
required to install the three Inserts (019657).
14. Mix in West Systems 404 High Density Filler until the mixture has the consistency of
mayonnaise.
15. Using a plastic bag with a corner cut off or a tongue depressor, apply the Epoxy to the outer
surfaces of the Inserts (019657).

16. Place the Epoxy covered Inserts (019657) into the mounting holes. Make sure that the Inserts
are square with the body and that the tops of the Inserts are just below the top surface of the
body. Use the small Plastic Keepers that are supplied with the Inserts to keep them square to
the floor.

17. Allow one hour for the epoxy to cure before continuing this procedure.
18. Using Alcohol and Shop Towels, clean the Bracket (112-5492).
19. Using a Power Drill with a 36-Grit Sanding Disk, scuff the back of the Bracket (1125492).
20. Using Shop Towels and Isopropyl Alcohol, clean the scuffed area on the bracket.
21. Using Shop Towels, apply Plexus Primer (020990) to the scuffed area on the bracket.
22. Using a Plexus Gun, apply Plexus to the back vertical surface of the Bracket (1125492).
23. Place the Bracket (112-5492) onto the bus body.
24. Secure the Bracket (112-5492) to the bus body using three M8 Bolts (005443-002).
25. Remove any excess Plexus.
26. Allow three hours for the Plexus to cure.

Headquarters: 1815 Rollins Road, Burlingame, CA 94010
East Coast Manufacturing: 1 Whitlee Court, Greenville, SC 29607
West Coast Manufacturing: 383 Cheryl Lane, City of Industry, CA 91789

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27. Using a Calibrated Torque Wrench with a 13mm Socket, torque the M8 bolts to 26
foot pounds.
28. Using a 1/2-Inch Ratchet/Socket, reinstall the Driver’s Barrier Stanchion using the
original hardware.
29. Remove the Lockout/Tagout devices and return the bus to service.

Headquarters: 1815 Rollins Road, Burlingame, CA 94010
East Coast Manufacturing: 1 Whitlee Court, Greenville, SC 29607
West Coast Manufacturing: 383 Cheryl Lane, City of Industry, CA 91789

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