FT5448 Service Bulletin/Repair Instructions

FAST TRACK
FT5448
REFERENCE:
Nova Bus Manuals
SECTION:
09: Engine and Cooling
RS NO:
MQR 7621-2653
EFFECTIVE IN PROD.:
NA
SUBJECT:
Rework allied motion e-Steering motor.
JUSTIFICATION:
24V e-steering power supply threads length tolerances might not be respecting to the

drawing specifications.
LEVEL
1
APPLICATION DEADLINES: 2024DE13

CLAIM REFERENCE NUMBER:WB-5448
DIRECT CHARGES
DESCRIPTION
Installation of steel ball on the terminals.

–
2
TIME
LABOUR
MATERIAL
Nova Bus
Nova Bus
0.33 h
–
–
–
MATERIAL REQUIRED PER VEHICLE

QTY
PART NO
REV.
DESCRIPTION
–
–
–
N620000252
–
3/16 Steel Ball
–
NCP2 Anticorossive

(32 oz of one can)
LEVEL 1
–

LEVEL 2
2
SHOP SUPPLIES

4ml
N67314
Materials will be available within 32 days once your order has been placed.

To order, please contact novabus.parts@volvo.com

Or by phone for CANADA 1-800-771-6682, for USA 1-877-999-8808

Specify document number, quantity of parts required and shipping address.
DISPOSAL OF PARTS

REMOVED PARTS ARE:
DISCARDED

*
RETAINED
–
––
* Dispose of the unused parts and the defective parts in

accordance with local environmental standards in effect.
REVISION HISTORY

REV.
DATE
NR
2023OC31
APPROVED BY:

NQF772001 VERSION 3
CHANGE DESCRIPTION
Initial release
Eric Charest
WRITTEN BY
Nandan B S
Signature numérique de Eric

Charest Date : 2023.10.31 15:23:55

-04'00'
PAGE 1 OF 10
FAST TRACK

ROAD NUMBER

CLIENT
ORDER
FROM
TO
FT5448

VIN (2NVY/4RKY...)

FROM
TO
QTY
New York City Transit New York - NYCT
LC78
9620
—
L82L4L9777581
L82L6L9777582
2
New York City Transit New York - NYCT Demo
LD23
—
9621
L82LXL9777634
L82L5L9777668
3
New York City Transit New York - NYCT
LC79
9623
9703
L82L1M9777782
L82LXM9777862
81
New York City Transit New York - NYCT
LC79
9704
9784
L82L1M9777863
L82L4M9777954
81
New York City Transit New York - NYCT
LD64
9785
9805
L82L0M9777871
L82L5M9777980
21
New York City Transit New York - NYCT
LD64
9806
9806
L82L7M9777981
L82L7M9777981
1
New York City Transit New York - NYCT
LD64
9807
9811
L82LXM9777988
L82L1M9777992
5
New York City Transit New York - NYCT
LD64
9812
9812
L82L3M9777993
L82L3M9777993
1
New York City Transit New York - NYCT
LD64
9813
9828
L82L5M9777994
L82L7M9778015
16
New York City Transit New York - NYCT
LD64
9829
9832
L82L4M9778022
L82LXM9778025
4
New York City Transit New York - NYCT
LD64
9833
9843
L82L1M9778026
L82LXM9778039
11
New York City Transit New York - NYCT
LD64
9844
9844
L82L1M9778043
L82L1M9778043
1
New York City Transit New York - NYCT
LD64
9845
9910
L82L3M9778044
L82L1M9778155
66
PAGE 2 OF 10

NQF772001 VERSION 3
FAST TRACK
FT5448
Tools Required

•
1/4 Inch lb. Torque wrench
•
3/8 Drive torque wrench
•
10 mm box and open wrench
•
1/4 drive 10 mm socket and rachet
CAUTION
You must shut down, lock out, and tag out the 12/24-Volt system before starting work on the 24-Volt electric

steering mechanism.
NOTE
Mechanical/manual steering will remain functional, if the power steering system becomes disabled.
WARNING
FOLLOW YOUR INTERNAL SAFETY PROCEDURES.
PROCEDURE

1.1.
Park the vehicle on an even surface with the transmission on neutral.
1.2.
Apply the parking brake and set the master control switch to the stop position.
PAGE 3 OF 10

NQF772001 VERSION 3
FAST TRACK

1.3.
FT5448
Locate the 24V power source within the battery box and disconnect it from the bus and securely place a

lockout/tagout device on the switch to ensure safety. Allow a 10 minutes after the battery disconnect switch

has been placed in the off position(see figure 1).
Figure 1 - Location of the 24V power source
PAGE 4 OF 10

NQF772001 VERSION 3
FAST TRACK

1.4.
FT5448
To access the e-steering system lift the bus to chest height and then open bus front street side compartment

(see figure 2).
Figure 2 - Location of the E-steering motor to access
1.5.
To access the e-steering motor with a square key and a 13mm wrench Loosen the 13mm bolt swing the bolt

downwards and utilize the square key to turn the lock and swing out the power steering reservoir (see figure 3).
13mm Bolt
Figure 3 - Access to the E-steering motor

PAGE 5 OF 10

NQF772001 VERSION 3
FAST TRACK

1.6.
FT5448
Remove the two blocks nearest to the terminals using a 10mm socket for the bolts and retain for reuse (see

figure 4).
Two cable blocks
Figure 4 - Removal of two cable blocks
1.7.
Disconnect the positive (+) and negative (-) cables nut connected to the stud using a 17mm socket retain

nuts (see figure 5).
Cable nuts
Figure 5 - Disconnecting the positive and negative cable nuts

PAGE 6 OF 10

NQF772001 VERSION 3
FAST TRACK

1.8.
FT5448
Utilizing a measuring device. Measure the length of both the positive (+) and negative (-) studs length, the

stud length should be between 15mm and 19mm (see figure 6).
Figure 6 - Measuring the length of positive and negative studs
NOTE
If the studs are not within the tolerance of 15mm min and 19mm max. proceed to step (1.10).

If the studs are within the tolerance 15mm min and 19mm max. proceed to step (1.11).
PAGE 7 OF 10

NQF772001 VERSION 3
FAST TRACK

1.9.
FT5448
Unscrew the stud using a 5mm Allen key and Insert just one steel ball N620000252 and reinstall the studs.

Measure the length of the studs and make sure that they are within specifications (see figure 7).
Figure 7 - Installation of Steel Ball
PAGE 8 OF 10

NQF772001 VERSION 3
FAST TRACK

1.10.
FT5448
Re-install the motor positive (+) and negative (-) cables with torque values and apply anticorrosive NCP2 on

re-connected cables (see figure 8).
NOTE
Positive Torque 10+1Nm or 88 to 97 lbf-in.

Negative Torque 20+3Nm or 177 to 203 lbf-in.
Figure 8 - Re-installation of motor (+) and (-) cables and apply anticorrosive NCP2 on cables
PAGE 9 OF 10

NQF772001 VERSION 3
FAST TRACK

1.11.
FT5448
Re-install the retained hose blocks using a 10mm socket and apply torque on the bolts to 10 N-m/88 lbs-in

(see figure 9).
Figure 9 - Re-installation of retained Cable Blocks
1.12.
Vehicle ready for service.
PAGE 10 OF 10

NQF772001 VERSION 3

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