FSB 874-052

Field Service Bulletin
Trucks
Volvo Trucks North America
Greensboro, NC USA
Date
This Field Service Bulletin replaces bulletin, “Climate Unit
Noise Reduction”, (USA57776) PV729-FSB874-052_M, dated
(5.2013).
2.2016
Group
No.
Release
874 052 02
Page
1(11)
Climate Unit Noise Reduction
VN, VHD, VT, VAH
FSB 874-052, Climate Unit Noise Reduction
(February 2016)
To address customer concerns of a 'whistling' noise from the main climate unit when in
recirculation mode, VOLVO Trucks has developed a repair procedure as outlined in this
document.
Required Parts
1 – Grease Syringe
All requests for grease syringes should be placed via e-mail ONLY to the following address:
[email protected].
E-mail request for syringes must include: Quantity of syringes required, Dealership Name,
Dealership Address, City, State, Zip Contact Name (person to receive syringes), and Contact
phone number. The subject line of the email should include Beralub FR43 Grease, Volvo
HVAC.
An e-mail will be sent out notifying the contact person when the syringes have been
packaged for shipment.
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-FSB874-052_V
Workshop
Foreman
Service Technicians
USA74770
Volvo Trucks North America
Field Service Bulletin
Date
2.2016
Group
No.
Release
874
052
02
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 Open the hood.
3 Disconnect the air inlet pipe from the air filter housing.
Page
2(11)
Volvo Trucks North America
Field Service Bulletin
Date
2.2016
Group
No.
Release
874
052
02
4
CAUTION
To avoid damage to the air filter restriction gauge and other surrounding components,
use caution when removing the air filter assembly.
Remove the air filter assembly. To avoid damage, place the air filter assembly in a secure
location.
W2081026
Page
3(11)
Volvo Trucks North America
Field Service Bulletin
Date
2.2016
Group
No.
Release
874
052
02
5 Remove the air intake grille.
W8080519
1 — Air Intake Grille
Page
4(11)
Volvo Trucks North America
Field Service Bulletin
Date
2.2016
Group
No.
Release
874
052
02
6 Remove the air filter assembly mount. Using a 14 mm socket, remove the outer fasteners
securing the air filter assembly mount. Using a 15 mm socket, remove the inner fasteners
securing the air filter assembly mount.
W2081027
Page
5(11)
Volvo Trucks North America
Field Service Bulletin
Date
2.2016
Group
No.
Release
874
052
02
7 With assistance, turn the ignition to the “ON” position. Cycle the ‘recirculate’ switch on the
HVAC control panel so that the air inlet doors are in the 3/4 closed position.
Note: Do not turn the ignition off as the HVAC control panel doors will move to the fully
open position with the switch off.
W8080515
Page
6(11)
Volvo Trucks North America
Field Service Bulletin
Date
2.2016
Group
No.
Release
874
052
02
8 For both doors, apply the grease to the hinge side door seal only.
W8080516
1 — Grease Syringe
Page
7(11)
Volvo Trucks North America
Field Service Bulletin
Date
2.2016
Group
No.
Release
874
052
02
9 For both doors, wipe excess grease from the air inlet door seal area.
W8080517
10 With the ignition switch in the “ON” position still, cycle the recirculate switch to close the air
inlet doors fully. Push grease into the hinge areas of both air inlet doors. Remove excess
grease from the inlet doors.
11 With the air inlet doors closed, apply grease into the hinge area for both doors. Remove
excess grease from the door hinge area.
12 With assistance, check the operation of the air inlet doors. Turn the ignition switch off.
Page
8(11)
Volvo Trucks North America
Field Service Bulletin
Date
2.2016
Group
No.
Release
874
052
02
13
CAUTION
To avoid component damage, do not overtorque the air filter assembly mount fasteners.
Install the air filter assembly mount. Torque fasteners to 60 ± 10 Nm (44 ± 7.4 ft-lb).
W2081027
Page
9(11)
Volvo Trucks North America
Field Service Bulletin
Date
2.2016
Group
No.
Release
874
052
02
14
CAUTION
To avoid damage to the air filter restriction gauge and other surrounding components,
use caution when installing the air filter assembly.
CAUTION
To avoid component damage, do not overtorque the air filter assembly fasteners.
Install the air filter assembly. Torque fasteners to 48 ± 8 Nm (35 ± 6 ft-lb).
W2081026
15 Connect the air inlet pipe to the air filter housing. Hand tighten the clamp securely.
Page
10(11)
Volvo Trucks North America
Field Service Bulletin
Date
2.2016
Group
No.
Release
874
052
02
Page
11(11)
16 Install the air intake grille. Fasten the clips securing the grille.
W8080519
1 — Air Intake Grille
17 Close the hood.
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
87457–2–00
0.6 hrs.
Causal Part
21318109, 21318107
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.