FSB-820-002

Field Service Bulletin
Trucks
Mack Trucks, Inc.
Greensboro, NC USA
SB-10052252-7963
Date
Group
No.
Release
Page
5.2013
820
002
01
1(7)
Hood Shock Leaks
CXU
FSB 820-002, Hood Shock Leaks
(May 2013)
Information
To address complaints of short service life of hood shocks on CXU model trucks built prior to
April 1, 2013, Mack has released a new shock with protective boot. Follow the procedure
outlined in this bulletin to properly install the new shock.
Note: Information is subject to change without notice.
Illustrations are used for reference only, and may differ slightly from the actual engine
version. However, key components addressed in this information are represented as
accurately as possible.
Required Parts
PV729-FSB820-002
Quantity
Part Number
Description
1
82058995
Ball Stud
1
994941
Spacer
1
948823
Washer
2
82713432
Shock
USA58552
Mack Trucks, Inc.
Field Service Bulletin
Date
5.2013
Group
No.
Release
820
002
01
Procedure
You must read and understand the precautions and guidelines in Service Information
Function Group 80, “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.
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) and positive battery terminals to prevent
personal injury from electrical shock and prevent damage to electrical components.
3 Open the hood.
4 On the right hand side (latch side) remove the safety clips from both ends of the hood
shock.
W8082073
Page
2(7)
Mack Trucks, Inc.
Field Service Bulletin
Date
5.2013
Group
No.
Release
820
002
01
5 Using a suitable tool, remove the shock from the frame (or radiator support) ball stud first.
Then remove the shock from the hood mounted bracket ball stud.
Note: The hood will move slightly forward when the shock is removed.
W8082074
Page
3(7)
Mack Trucks, Inc.
Field Service Bulletin
Date
5.2013
Group
No.
Release
820
002
01
6 On the right hand side of the hood, remove the ball stud from the hood mounted bracket.
W8082075
1 – Ball Stud
2 – Lock Nut
Page
4(7)
Mack Trucks, Inc.
Field Service Bulletin
Date
5.2013
Group
No.
Release
820
002
01
7 On the right hand side of the hood, at the hood mounted bracket, install the supplied ball
stud, spacer and washer. Torque fastener to 48 ± 8 Nm (35.4 ± 6 ft-lb).
W8082076
1 – Lock Nut
2 – Spacer (part number 994941)
3 – Washer (part number 948823)
4 – Ball Stud (part number 82058995)
8 At the hood mounted bracket, using moderate pressure, push the shaft end of the shock
onto the ball stud.
9 Install the body end of the shock on the frame (or radiator support) mounted ball stud.
Note: The hood may have to be moved slightly to attach the body end of the shock.
Page
5(7)
Mack Trucks, Inc.
Field Service Bulletin
Date
5.2013
Group
No.
Release
820
002
01
10 Install the safety clips (1 and 2) in the ends of the shock.
Note: Turn the ball ends of the shock slightly to allow safety clip installation.
W8082077
11 On the left hand side of the hood, remove the safety clips from both ends of the hood
shock.
12 Using a suitable tool, remove the shock from the frame (or radiator support) ball stud first.
Then remove the shock from the hood mounted bracket.
Note: The hood will move slightly forward when the shock is removed.
13 At the hood mounted bracket, using moderate pressure, push the shaft end of the shock
on the ball stud.
14 Install the body end of the shock on the frame (or radiator support) mounted ball stud.
Note: Move the hood slightly to attach the body end of the shock.
15 Install the safety clip ends of the shock.
Note: Turn the ball ends of the shock slightly to allow safety clip installation.
16 By carefully opening and closing the hood, check the operation of the hood struts.
17 Close and latch the hood.
18 Install all previously removed cables to the ground (negative) battery terminals.
Page
6(7)
Mack Trucks, Inc.
Field Service Bulletin
Date
5.2013
Group
No.
Release
820
002
01
Page
7(7)
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.)
01
Labor Code
Primary Labor Code
6221T-ZP-80 0.3 hrs.
Causal Part
21007401
Mack Trucks, Inc. engages in a comprehensive program of testing and evaluating to provide
the best possible product. Mack Trucks, Inc. however, is not committed to, or liable for
updating existing vehicles.