FSB514-001

Field Service Bulletin
Trucks
Volvo Trucks North America
Greensboro, NC USA
Date
This Field Service Bulletin (FSB) replaces, “PV729-FSB514–
001_V, Brake S-Cam, Replacement” (USA78132) dated
(07.2016).
6.2018
Group
No.
Release
514 001 03
Page
1(18)
Brake S-Cam, Replacement
(Steer Axle)
VN
FSB 514-001, Brake S-Cam, Replacement
(June 2018)
Some VOLVO VN trucks built after 05/13/2013, equipped with Bendix Brake S-Cams on the
steer axle may require replacement to reduce or eliminate brake noise during braking. The
replacement procedure includes installation of a new tuned brake S-Cam shaft, spring &
roller kit, and seal & shim kit. Follow the S-Cam replacement procedure outlined in this Field
Service Bulletin (FSB).
Note: For replacement, use the 10 spline Brake S-Cam shaft for trucks built from 05/13/2013
to 07/09/2017. See reference image of 10 spline brake S-Cam (I) in figure below.
Note: For replacement, use the 28 spline Brake S-Cam shaft for trucks built from 07/10/
2017. See reference image of 28 spline brake S-Cam (2) in figure below.
W5133024
Service personnel: Please circulate, read and initial
Service
Manager
Warranty
Administrator
PV729-FSB514-001_V
Workshop
Foreman
Service Technicians
USA141513260
Volvo Trucks North America
Field Service Bulletin
Date
6.2018
Group
No.
Release
514
001
03
Bendix Tuned S-Cam Description
Note: The Bendix Tuned S-Cam shaft is “Only” designed to reduce/or eliminate brake noise
heard within the 1200 to 1500 Hertz frequency range. Submission of a video or audio file
with the tech support case will assist in the diagnosis of any brake noise concern.
The Bendix Tuned S-Cam is designed to reduce and/or eliminate brake noise heard within
the 1200-1500 Hertz frequency range. Although the tuned S-Cam may help reduce brake
noise heard in other frequency ranges, it is only designed to effectively reduce the noise
range between 1200-1500 Hz. Proper installation and clearance of the Bendix tuned S-Cam
is very important. To ensure the best results in noise reduction follow all steps within this
FSB. Below is an example Hertz graph of the Bendix brake noise.
W5112306
Verifying Noise
A Tech Support/E-Service case will need to be submitted to verify that the Bendix brake
noise is within the Frequency Range that the new tuned S-Cam is designed to correct. To
verify the Bendix brake noise the truck may need to be test driven and the front steer axle
brakes heated up to 300° Fahrenheit then let cool to 150° Fahrenheit. Most Bendix brake
noise complaints can be duplicated after brakes are heat cycled and then test driven using
15-25 psi brake applications. Tech Support may ask that a video or sound file be taken and
uploaded to the case for verification. A valid Tech Support/E-Service case number will be
needed when ordering parts.
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Volvo Trucks North America
Field Service Bulletin
Date
6.2018
Group
No.
Release
514
001
03
Parts Ordering
To schedule parts orders and repairs, please call (877) 986-5862 with a valid Tech Support/
E-Service case number and VIN number of the vehicle in need of this repair.
Note: Example Tech Support/E-Service Case Number (1-XXXXXXXXXX).
W5133026
10-Spline Camshaft (For Trucks Built From 05/13/2013 to 07/09/2017)
Item
Description
Part Number
Qty
1
Camshaft, Tuned Mass, CW, 10SPLINE
85150135
1
2
Camshaft, Tuned Mass, CCW , 10SPLINE
85150134
1
3
Spring Kit
85153537
2
4
Hardware Module Kit
85153464
1
W5133025
28-Spline Camshaft (For Trucks Built From 07/10/2017)
Item
Description
Part Number
Qty
1
Camshaft, Tuned Mass, CW, 28SPLINE
22880282
1
2
Camshaft, Tuned Mass, CCW , 28SPLINE
22880283
1
3
Spring Kit
85153537
2
4
Hardware Module Kit
85153464
1
Page
3(18)
Volvo Trucks North America
Field Service Bulletin
Date
6.2018
Group
No.
Release
514
001
03
Decommissioning the Truck for Repair
You must read and understand the precautions and guidelines in Service Information,
group 50, "General Safety Practices, Brakes" before performing this procedure. If you are
not properly trained and certified in this procedure, ask your supervisor for training before
you perform it.
NOTE: Information is subject to change without notice. Illustrations are used for reference
only and can differ slightly from the actual vehicle being serviced. However, key
components addressed in this information are represented as accurately as possible.
1 Park the vehicle on a flat and level surface.
2 Apply the parking brake.
3 Place the transmission in neutral or park.
4 Install the wheel chocks.
W7086748
5 Disconnect the cable from the battery’s negative terminal.
W3086747
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Volvo Trucks North America
Field Service Bulletin
Date
6.2018
Group
No.
Release
514
001
03
Brake S-Cam Removal
Note: The left side is shown for instructional purposes.
1 Lift the steer axle with a jack, place the truck on jack stands, and remove the jack.
2 Remove the wheel nuts.
Note: Before removing the wheel, mark the end of one wheel stud with a paint marker
and mark the wheel at the stud to ensure the wheel is reinstalled in the same position.
W5111900
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Volvo Trucks North America
Field Service Bulletin
Date
6.2018
Group
No.
Release
514
001
03
3 Remove the wheel.
W5111901
4 With the wheel removed, match mark the drum to the wheel stud to ensure the drum can
be reinstalled in the same position.
5 Mark the brake shoes to ensure they can be reinstalled in the same position (top or
bottom).
6 If applicable, remove the slack adjuster pawl.
W5111903
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Volvo Trucks North America
Field Service Bulletin
Date
6.2018
Group
No.
Release
514
001
03
7 Back off of the brake (slack adjuster).
Note: The Meritor slack adjuster is shown in this procedure for backing off the brakes.
However, this procedure is similar for other brands.
W5111904
8 Remove the brake drum.
Note: Clean the brake drum of any dust or debris and store for installation.
W5111905
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Volvo Trucks North America
Field Service Bulletin
Date
6.2018
Group
No.
Release
514
001
03
9 Remove the brake shoes, brake springs, and rollers.
Note: Clean the brake shoes of any dust or debris and store for installation.
W5111906
10 Loosen the two nuts securing the brake chamber to the cam tube mounting bracket.
W5111907
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Volvo Trucks North America
Field Service Bulletin
Date
6.2018
Group
No.
Release
514
001
03
11 For Haldex slack adjusters, remove the fasteners securing the slack adjuster to the cam
tube mounting bracket.
W5111908
12 Remove the snap ring and washers securing the slack adjuster to the brake S-Cam.
W5111909
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Volvo Trucks North America
Field Service Bulletin
Date
6.2018
Group
No.
Release
514
001
03
13 Remove the four nuts and washers securing the cam tube to the brake spider.
W5111910
14 Remove the brake S-Cam by pulling the S-Cam clear of the cam tube and brake spider.
Note: Remove brake S-Cam head washer (2) from the removed S-Cam (1). Clean the
head washer and store it for reuse.
W5111911
15 Follow steps 2 through 14 for the right side of the truck.
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Volvo Trucks North America
Field Service Bulletin
Date
6.2018
Group
No.
Release
514
001
03
Brake S-Cam Installation
Note: The left side is shown for instructional purposes.
1 Inspect the cam tube. Ensure the grease seals and bushing are good.
Note: Replace the grease seals and/or bushings if needed.
2 Retrieve the stored S-Cam head washer (2) and install it on the replacement S-Cam (1) in
the proper direction.
W5111912
3 Lube the replacement S-Cam before installing it in the cam tube.
4 Position the S-Cam in the cam tube and slide it into the brake spider.
W5111913
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Volvo Trucks North America
Field Service Bulletin
Date
6.2018
Group
No.
Release
514
001
03
5 Install the four nuts securing the cam-tube and brake S-Cam to the brake spider.
6 Tighten the four nuts to 75 ft-lbs (102 N m).
W5111914
7 Properly position the slack adjuster on the replacement S-Cam.
8 Install the shim washer on the S-Cam, slack adjuster, and shim S-Cam to set the lateral
end play 0.127 – 0.635 mm (.005-.025 in).
9 Install the E-clip.
Note: Ensure the E-clip is in the groove at the end of the S-Cam.
W5111909
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Volvo Trucks North America
Field Service Bulletin
Date
6.2018
Group
No.
Release
514
001
03
10 Measure the cam bushing play.
Note: The maximum S-Cam bushing vertical end play permitted is (0.035 in).
11 Tighten the two nuts securing the brake chamber to the cam tube mounting bracket.
Note: On the first pass, tighten the two nuts to 34 Nm (25 ft-lb).
Note: On the second pass, tighten the two nuts to 180 – 210 Nm (133 – 154 ft-lb).
W5111907
12 For Haldex slack adjusters, install the fasteners securing the slack adjuster to the cam
tube bracket.
13 Tighten the slack mounting strap fastener to 11 – 16 Nm (8 – 12 ft-lb).
W5111908
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Volvo Trucks North America
Field Service Bulletin
Date
6.2018
Group
No.
Release
514
001
03
14 Using a grease gun, grease the cam tube and slack adjuster until they purge.
Note: Ensure the grease seal at the S-Cam head does not leak. If it does leak, replace
the seal.
15 Pre-lube the rollers and anchor pin pockets on the brakes before installing brake shoes.
16 Install the brake shoes, springs and rollers in the same position (top or bottom) as
previously recorded.
W5111915
17 Install the brake drum as previously recorded on the drum and wheel stud during the
removal procedure.
W5111905
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Volvo Trucks North America
Field Service Bulletin
Date
6.2018
Group
No.
Release
514
001
03
18 Install the wheel using the reference marks made on the wheel and the wheel stud during
the removal procedure.
W5111901
19 Install the wheel nuts.
20 Tighten the wheel nuts to 610 Nm (450 ft-lb).
W5111900
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Volvo Trucks North America
Field Service Bulletin
Date
6.2018
Group
No.
Release
514
001
03
21 Adjust the brake as recommended per (slack adjuster) manufacturer.
W5111904
22 If applicable, install the slack adjuster pawl.
W5111903
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Volvo Trucks North America
Field Service Bulletin
Date
6.2018
Group
No.
Release
514
001
03
23 After brake the adjustment, rotate the wheel and ensure the brake is not dragging or the
drum is not out of round.
24 Repeat steps 1 through 21 for the right side of the truck.
25 Lift the steer axle with a jack, remove the jack stands, and lower the axle.
26 Go to Commissioning the Truck for Operation.
Commissioning the Truck for Operation
1 Connect the battery cable to the negative (ground) terminal.
W3086758
2 Remove the wheel chocks.
W7086759
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Volvo Trucks North America
Field Service Bulletin
Date
6.2018
Group
No.
Release
514
001
03
Reimbursement
This repair may be eligible for reimbursement if a
product failure was experienced within time and mileage
limits of the applicable Warranty coverage.
Reimbursement is obtained via the normal claim
handling process.
UCHP
Reimbursement
Claim Type (used only when uploading from the Dealer
Bus. Sys.)
W
Labor Code
Primary Labor Code (Brake S-Cam, Replacement)
5143-03-09-01
3.0 hrs.
Causal Part
85137267
VOLVO Trucks North America reserves the right to make any changes in design or to make
additions to or upon its products without incurring any obligations to install the same on
vehicles previously built.
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