SP-218-002-01

SB-10051928-1748
Mack Trucks, Inc.
Greensboro, NC USA
Service Program
Trucks
Date
Group
No.
Release
Page
3.2013
218
002
01
1(6)
Incorrect Hardware on Front Engine Mount
MRU
PI0821, Incorrect Hardware on Front Engine Mount
(March 2013)
Certain MRU vehicles may have been assembled using the incorrect grade and/or length of
bolts in the front engine mount for both the left and right side of the vehicle. Bolt part numbers
and length vary depending on the engine model installed on the vehicle. To complete the
repair and install the proper bolts, utilize the installation drawings and part number lists
included in this document.
Note: Information is subject to change without notice.
Illustrations are used for reference only and may differ slightly from the actual vehicle being
serviced. However, key components addressed in this information are represented as
accurately as possible.
PV729-PI0821
USA58327
Mack Trucks, Inc.
Service Program
Date
3.2013
Group
No.
Release
218
002
01
Frame Engine Mount Installation
MRU, Engine Mount Installation (Mack Engines)
W7080276
Description
Part Number
Quantity
Illustration Number
Shoulder Bolt
25087900
6
1
Shoulder Bolt
25012714
2
2
Washer
25088675
14
3
Hexagon Nut
20760812
8
4
Note: * Bolt head located outside of the frame. All other bolt heads located inside of the
frame.
Page
2(6)
Mack Trucks, Inc.
Service Program
Date
3.2013
Group
No.
Release
218
002
01
MRU, Engine Mount Installation (Cummins Engines)
W7080276
Description
Part Number
Quantity
Illustration Number
Shoulder Bolt
25085600
6
1
Shoulder Bolt
25087900
2
2
Washer
25088675
14
3
Hexagon Nut
20760812
8
4
Note: * Bolt head located outside of the frame. All other bolt heads located inside of the
frame.
Page
3(6)
Mack Trucks, Inc.
Service Program
Date
3.2013
Group
No.
Release
218
002
01
Procedure
You must read and understand the precautions and guidelines in Service Information,
Function Group 70, "General Safety Practices, Frame, Springs and Wheels" 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
Before working on a vehicle, set the parking brakes, place the transmission in neutral, and
block the wheels. Failure to do so can result in unexpected vehicle movement and can
cause serious personal injury or death.
Note: This procedure applies to both sides of the frame rail and engine mount.
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 Remove all cables from the ground (negative) battery terminals to prevent personal injury
from electrical shock and prevent damage to electrical components.
3
W2055601
Using the hydraulic pump, raise cab to full upright locked position.
Note: Before you attempt to raise the cab make sure that there are no loose items within
the cab that could fall and cause damage.
4 Remove the front tires and wheels.
5 Using a jack, raise the front axle slightly so that the weight of the axle is off of the front
springs. Then use jack stands under the end of the axle for support.
Note: Rotate the steering wheel right and left to gain access to the work space as needed.
Page
4(6)
Mack Trucks, Inc.
Service Program
Date
3.2013
Group
No.
Release
218
002
01
6 Support the front engine mount with a jack or jack stand.
Note: This support is used as a precaution only and is not supporting the full weight of the
engine.
7 As needed, cut cable ties securing airlines or harnesses in the work area.
8 Remove the nuts one at a time from the fasteners securing the front engine mount to the
frame rail.
9
CAUTION
To avoid component damage, do not allow body bound bolts to turn in their respective
holes. Otherwise, the interference between the holes and bolts is compromised.
Replace each bolt one at a time until all eight have been replaced and secured. Torque
each fastener to 298 ± 24 Nm (220 ± 18 ft-lb). Using a hammer of suitable size strike the
bolt heads a few times to seat them properly. Re- torque each fastener to 298 ± 24 Nm
(220 ± 18 ft-lb).
Note: The eight fasteners securing the front engine mount to the frame are body bound
bolts. Replace them one at a time.
10 Install cable ties as needed to secure the airlines and harnesses disconnected previously.
11 Install the tires and wheels. Torque nuts to 610 – 678 Nm (450 – 500 ft-lb).
12 Jack the vehicle up and remove all jack stands. Lower the vehicle.
13 Lower the cab.
14 Install all previously removed cables to the ground (negative) battery terminals.
Page
5(6)
Mack Trucks, Inc.
Service Program
Date
3.2013
Group
No.
Release
218
002
01
Reimbursement
This repair is covered by an authorized Service Program. Reimbursement is
obtained via the normal claim handling process.
Claim Type (used only when uploading from the Dealer Bus.
Sys.)
B
Recall Status
Vehicle inspected, repair not required
1- Inspected OK
Vehicle repaired per instruction
2- Modified per
instruction
Labor Code
Primary Labor Code
2991E–ZU–96 1.2
hrs
Time to take charge and determine campaign status
101AA–0A–00
0.3 hrs.
Causal Part
25012714
Authorization Number
PI0821
Expiration Date
12/31/2013
Note: Take Charge Time is not included in the Labor Code for this operation. Take charge
may be eligible but can only be used once per repair visit. If vehicle is having other warranty
repairs performed, take charge should be charged to the warranty repair, otherwise take
charge can be charged to this service program.
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