NHTSA ID Number: 10250590
Manufacturer Communication Number: BS5495E
TSB/Document Date: 2024-02-24
Summary
HVAC coolant pipe leaks from various solder locations.
SERVICE BULLETIN
Nova Bus
Manuals
14: Heating and Ventilation
REFERENCE:
SECTION:
BS5495E
APPLICATION DEADLINES: 2025MA30
CLAIM REFERENCE NUMBER:WB5495
MQR 7621-2507
EFFECTIVE IN PROD.: NA
RS NO:
SUBJECT:
HVAC coolant pipe leaks.
JUSTIFICATION:
HVAC coolant pipe leaks from various solder locations
DIRECT CHARGES
DESCRIPTION
LABOUR
MATERIAL
TIME
1
Inspection for the cracks, leaks and AVT application for the solder
joints
2h
2
Replace the affected pipes in 10% of the 30 inspected buses
4h
DISPOSAL OF PARTS
REMOVED PARTS ARE:
DISCARDED
*
RETAINED
Yes
–
* Dispose of the unused parts and the defective parts in
accordance with local environmental standards in effect.
REVISION HISTORY
REV.
DATE
NR
2024FE09
APPROVED BY:
NQF772001 version 5
CHANGE DESCRIPTION
Initial release
Signature
numérique de Irina
Negoescu
Irina
Negoescu Date : 2024.02.09
14:19:54 -05'00'
WRITTEN BY
Devanand
PAGE 1 OF 21
SERVICE BULLETIN
BS5495E
MATERIAL REQUIRED PER VEHICLE
PART NO
REV.
–
–
–
1
N85930
B
PIPE HTG SUPPLY
8
N20379
C
TUBE INSULATION 1 3/8" ID
1.25 LF
N43021
–
LOOM 1-1/2"
38
G5007995
–
1
N92370
A
PIPE HEATING RETURN
1
N100293
–
PIPE HTG ASSY SUPPLY AC353
3
N20378
C
TUBE INSULATION 3/4" ID
3
G5007996
–
CABLE TIE (0657558)
3
N79131
–
CONNECTOR F-IFL-12, M-NPT-12
1
N100099
A
PIPE HTG ASSY RETURN AC353
1
N100316
A
PIPE HEAT FRONT ASSY
0.25 LF
R015045
–
LOOM 3/4"
1
N100311
A
PIPE HEATING FRONT ASSY
QTY
DESCRIPTION
LEVEL 1
–
LEVEL 2
Materials will be available within 77 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.
PAGE 2 OF 21
NQF772001 version 5
SERVICE BULLETIN
ROAD NUMBER
CLIENT
ORDER
BS5495E
VIN (2NVY/4RKY...)
FROM
TO
FROM
TO
QTY
New York City Transit - NYCT - New York
LC79
9704
9718
L82L1M9777863
L82L3M9777878
15
New York City Transit - NYCT - New York
LD64
9845
9859
L82L3M9778044
L82L8M9778072
15
PAGE 3 OF 21
NQF772001 version 5
SERVICE BULLETIN
BS5495E
FOLLOW YOUR INTERNAL SAFETY PROCEDURES.
PROCEDURE
1.1.
1.2.
1.3.
Park the vehicle on an even surface with the transmission on neutral.
Apply the parking brake and set the master control switch to the stop position.
Set the battery disconnect switch in the battery compartment to the off position.
LEVEL 1 : INSPECTION OF PIPES
1.4.
Open the interior Baselight panels at BL1, BL2, BL3 and BL4. Pull back foam installation to expose the
coolant pipe solder joints.
BL4
BL3
BL2
BL2
BL1
Figure 1 - Baselight Panel location to check Coolant Pipe Solder Joints
1.5.
1.6.
Place the battery master switch on. Open the rear Engine compartment door and locate the rear engine run
box and place the engine run switch in the center position.
Perform a coolant leak test.
PAGE 4 OF 21
NQF772001 version 5
SERVICE BULLETIN
BS5495E
Engine Coolant Leak Test
1.7.
Ensure that the Master switch, located on the driver side console is in the OFF position.
Figure 2 - Master Switch in OFF Position
1.8.
Place the engine control switch, located on the engine control box, in the rear run position.
Figure 3 - Engine Control Switch
1.9.
Validate the engine cooling system level using ACTIA. The display screen will display the Engine coolant
level state it will state Low Cold Level.
Figure 4 - Engine Coolant Level
PAGE 5 OF 21
NQF772001 version 5
SERVICE BULLETIN
1.10.
BS5495E
Open the overhead console and locate the Maintenance switch and switch it to the (I) Maintenance mode.
Figure 5 - Location of Maintenance Switch
1.11.
Place the Heater Defroster Control valve in the fully open position.
Figure 6 - Heater Defroster Contr
PAGE 6 OF 21
NQF772001 version 5
SERVICE BULLETIN
1.12.
BS5495E
Ensure on the full control panel that all fill valves are in the closed position.
Figure 7 - Checking Valves Closed Position
1.13.
Set the engine control switch located on the rear engine control box to the Center position.
Figure 8 - Engine Control Switch to Center Position
PAGE 7 OF 21
NQF772001 version 5
SERVICE BULLETIN
1.14.
BS5495E
Press down the engine start switch on the rear engine control box for 5 seconds and release. Press down
again on engine start switch for 1 second and release.
Figure 9 - Engine Start Switch
1.15.
Remove engine surge tanks cap and install pressure tester.
Figure 10 - Install Pressure Tester
PAGE 8 OF 21
NQF772001 version 5
SERVICE BULLETIN
1.16.
1.17.
- Contains Alugard Plus for compatibility with all ethylene...
- Fights corrosion, scaling and rust while protecting all...
- High-quality additives protect against leaks and won’t...
- Pre-mixed yellow formula is ready-to-use in a 50/50 ratio...
- Contains 30 – 50 ppm of denatonium benzoate as a bittering...
- 5 year/150, 000 mile . Silicate-free, long-life, phosphate...
- Formulated to replace the OEM fluid in Asian make vehicles...
- The long life formula provides protection for all cooling...
- Meets the following OEM and industry specifications...
- Contains 30 – 50 ppm of denatonium benzoate as a bittering...
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TSB/Document ID: BS5495E
Replacement Service Bulletin Number:
MFR Communication Date: 2024-02-09
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: VISIBILITY
MFR Component System:
MFR Component Subsystem:
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