SAV.1E.2012MA

SERVICE BULLETIN

BS4173ER1

REFERENCE:

Nova Bus Manuals

APPLICATION DEADLINE: 2019JN18

SECTION:

14: HVAC

CLAIM REFERENCE NUMBER: WB-4173

RS NO:

MQR 7621-1154

EFFECTIVE IN PROD.:

N/A

SUBJECT:

EGS flexible coolant hoses

JUSTIFICATION:

The EGS coolant hoses may leak in the baselight above the passenger area.

LEVEL

DIRECT CHARGES

DESCRIPTION

LABOUR

MATERIAL

TIME

1

Above the passenger area, install copper pipes in between PEX
tubing and flexible hoses.

Nova Bus

Nova Bus

2

Adjust PEX tubing length if there is interference.

Nova Bus

Nova Bus 20 min

7h

MATERIAL
PART NO

REV.

1

N90353

–

Heating pipe inboard FR assembly

–

1

N90354

–

Heating pipe outboard RR assembly

–

1

N90355

–

Heating pipe outboard FR assembly

–

1

N90356

–

Heating pipe inboard RR assembly

–

2

N92161-02

–

Cap and saddle bracket (middle section)

N70905-02

2

N92161-03

–

Cap and saddle bracket (bottom section)

N70905-03

4

N69299

–

Cable tie 250 lbs, Tyton T255

–

QTY

DESCRIPTION

REPLACES PART N°

LEVEL 1

48

G5007994

–

Cable tie

–

4 x 6 ft

N20379

–

Tube insulation 1 3/8" ID

–

4

N45715

–

Ring for Pex 1-1/2"

–

16

N68156

–

Cable tie

–

LEVEL 2 (only if required*)

3 ft

N45726

–

Tubing Pex 1-1/2"

–

3

N45715

–

Ring for Pex 1-1/2"

–

1

N91167

–

Brass fitting for Pex 1-1/2"

–

Materials will be available within 42 days once your order has been placed. To order, please contact Prevost Parts by phone
at 1-800-771-6682, by fax at 1-888-668-2555 or by email at prevostparts.commandes@volvo.com. Specify document number,
quantity of parts required and shipping address.
* The material identified in Level 2 is to be ordered only for vehicles that meet the criteria defined in Level 1.

SEE PAGE 2 FOR TOOLS AND ACCESSORIES.

APPROVED BY: Daniel Theriault

Digitally signed by Daniel Theriault
DN: cn=Daniel Theriault, o=Nova Bus, ou, email=daniel.theriault@volvo.com, c=CA
Date: 2018.09.07 08:42:10 -04'00'

PAGE 1 OF 25

SAV.1E.2012MA

SERVICE BULLETIN

BS4173ER1

TOOLS AND ACCESSORIES
QTY

MODEL NO

1

N8907170

M12 battery ProPEX tubing cutter, Milwaukee

or the equivalent

1

N8907171

M18 battery ProPEX expansion tool, Milwaukee

or the equivalent

1

N8907172

1-1/2" M18 ProPEX Expansion Head, Milwaukee

or the equivalent

1

N8907632

1.75 oz ProPEX Expander Cone Grease, Milwaukee

or the equivalent

DESCRIPTION *

NOTE

* Milwaukee tooling is recommended by Uponor, manufacturer of PEX pipes and fittings.

N8907172

N8907632

N8907171

N8907170

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

CHANGE DESCRIPTION

WRITTEN BY

NR

2018JA30

Initial release

Danielle Lacroix

R1

2018AL18

Increase in the QTY of N92161-02 & N92161-03 to 2.
And increase in the labour time of level 1 from 6hrs to 7
hrs.

Pramod Gouda

PAGE 2 OF 25

SAV.1E.2012MA

SERVICE BULLETIN
ROAD NUMBER
CLIENT

ORDER

BS4173ER1

VIN (2NVY/4RKY...)

FROM

TO

FROM

TO

QTY

SEPTA - Pennsylvania

L741

7355

7355

S92L4E4500504

S92L4E4500504

1

SEPTA - Pennsylvania

L742

7371

7414

S92L6E4500729

S92L7E4500772

44

SEPTA - Pennsylvania

L743

7356

7370

S92L1E4500489

S92L2E4500503

15

SEPTA - Pennsylvania

L745

7415

7415

S92L0F4500873

S92L0F4500873

1

SEPTA - Pennsylvania

L746

7416

7454

S92L7F4500952

S92L8F4501012

39

SEPTA - Pennsylvania

L749

7302

7354

S92Y7D4500409

S92L2E4500470

53

SEPTA - Pennsylvania

L861

7300

7484

S92L5G9775188

S92L8G9775220

32

PAGE 3 OF 25

SAV.1E.2012MA

SERVICE BULLETIN

BS4173ER1

WARNING

Follow your internal safety procedures.

PROCEDURE
WARNING

The PEX working procedure contained in this service document should be done per the Uponor manufacturer
instructions. Failure to comply with these requirements may cause coolant to leak.
The procedure for removing and installing Uponor PEX (extract from the Uponor Assistance Manual) is
available in Appendix 1, or you could also refer to HePEX heating pipes heading in SECTION 99: GENERAL
PRACTICES in the Nova Bus Maintenance Manual.

OVERVIEW OF THE MODIFICATION

Figure 1 - Top View of a 60-ft Bus

REAR

FRONT

N90354

7½ in (190 mm)

N90355

N90356

N90353

4¾ in (120 mm)

Cap and saddle
brackets

Folding bellows