FSB 874-053 Service Bulletin/Repair Instructions

Field Service Bulletin

Trucks
Volvo Trucks North America

Greensboro, NC USA
Date
5.2013
Group
No.
Release
874 053 01
Page
1(10)
Climate Unit Reduction

VN, VHD, VAH, VT
FSB 874-053, Climate Unit Noise Reduction

(May 2013)

To address concerns of a whistling noise coming from the main climate unit, when the fan

speed is set to the second position, follow the procedure outlined in this document.
Required Parts

1 – Permatex Black Silicone Adhesive Sealant

VOLVO recommends using Permatex Black Silicone Adhesive Sealant (part number 81173,

12.9 oz cartridge, 81158 3 oz tube ) for sealing Please visit www.permatex.com for retailers,

MSDS information and Technical Data Sheet.

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.
Service personnel: Please circulate, read and initial
Service

Manager
Warranty

Administrator
PV729-FSB874-053
Workshop

Foreman
Service Technicians
USA57858
Volvo Trucks North America

Field Service Bulletin
Date

5.2013
Group
No.
Release
874
053
01
Procedure

You must read and understand the precautions and guidelines in Service Information,

Function Group 8, “General Safety Practices, Cab” before performing this procedure. If you

are not properly trained and certified in this procedure, ask your supervisor for training

before you perform it.
DANGER

Do not attempt to repair or service a vehicle without the proper training, tools and service

information. Failure to do so may result in component damage, serious injury or death.

1 Secure the vehicle for service by parking it on a flat level surface, applying the parking

brake, chocking the rear wheel, and placing the transmission in neutral.

2 Disconnect all cables from the negative (ground) battery terminals to prevent personal

injury from electrical shock and prevent damage to electrical components.

3 To avoid damage, cover the dash panel area.

4 Remove the center tray/cup holder.

Note: Remove the fastener located under the cup holder.
Page

2(10)
Volvo Trucks North America

Field Service Bulletin
Date

5.2013
Group
No.
Release
874
053
01
5 Remove the cover over the fastener securing the grab handle. Remove the grab handle.
T8009794
6 Remove the covering over the right side dash speaker. Unplug and remove the speaker.
Page

3(10)
Volvo Trucks North America

Field Service Bulletin
Date

5.2013
7 Remove the upper dash panel fastener.
T8009794
8 Remove the door threshold plate.

9 To access the right dash panel, remove the floor covering.

10 Remove the lower fasteners securing the dash panel.

11 Remove the right side dash panel.
Group
No.
Release
874
053
01
Page

4(10)
Volvo Trucks North America

Field Service Bulletin
Date

5.2013
Group
No.
Release
874
053
01
12 Remove the clips securing the HVAC blower motor cover.
W8081178
13 Pull the HVAC blower motor from the housing.

Note: Do not disconnect the blower motor.
Page

5(10)
Volvo Trucks North America

Field Service Bulletin
Date

5.2013
Group
No.
Release
874
053
01
14 Apply a liberal amount of Permatex Black Silicone Adhesive Sealant to seal the

highlighted holes in the blower motor housing.
W8080541
Page

6(10)
Volvo Trucks North America

Field Service Bulletin
Date

5.2013
Group
No.
Release
874
053
01
15 Install the blower motor into the HVAC housing.
T8008791
16 Using clips Install the HVAC blower motor housing cover.

17 Carefully remove the ventilation nozzles (F) from the dash panel.
Page

7(10)
Volvo Trucks North America

Field Service Bulletin
Date

5.2013
Group
No.
Release
874
053
01
18 Install the dash panel over the HVAC housing. Tighten fasteners until secure.
T8009795
19 Install the ventilation nozzles (F).

20 Reconnect the speaker.

21 Install the speaker and grille.
Page

8(10)
Volvo Trucks North America

Field Service Bulletin
Date

5.2013
Group
No.
Release
874
053
01
22 Reinstall the grab handle. Torque the fasteners to 24 ± 4 Nm (18 ± 3 ft-lb).
T8009795
23 Install the center tray and cup holder.

24 Remove the protective cover from the dash panel.

25 Install the threshold plate. Install the threshold plate fastener covers.

26 Reconnect all previously removed cables to the negative (ground) and positive battery

terminals.
Page

9(10)
Volvo Trucks North America

Field Service Bulletin
Date

5.2013
Group
No.
Release
874
053
01
Page

10(10)
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.

Claim Type (used only when uploading from the Dealer Bus. Sys.)
W
Labor Code

Primary Labor Code
87458–2–00

0.7 hrs.
Causal Part
21029787

VOLVO Trucks North America engages in a continuous program of testing and evaluating to

provide the best possible product. VOLVO Trucks North America, however, is not committed

to, or liable for updating existing chassis.

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