FT5328

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REFERENCE:

Nova Bus Manuals

SECTION:

08: Pneumatic System

RS NO:

MQR 7621-2506

APPLICATION DEADLINE: 2024FE28
CLAIM REFERENCE NUMBER: WB-5328

EFFECTIVE IN PROD.: N/A
SUBJECT:

Leveling valve out of Adjustment.

JUSTIFICATION:

Leveling valve N92260 found out of adjustment.

LEVEL

DIRECT CHARGES

DESCRIPTION

1

leveling valve re-adjustment.

2

–

TIME

LABOUR

MATERIAL

Novabus

Novabus

1h

–

–

–

MATERIAL REQUIRED PER VEHICLE
QTY

PART NO

REV.

DESCRIPTION

–

–

–

N30292

D

LEVEL 1

–
LEVEL 2

2

Suspension Linkage Kit

LEVEL 2 SPECIAL TOOLING

1

NT1090

NR

Suspension Air Bags Height Gage

1X NT1090 PER DEPOT

Materials will be available within 44 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

Yes

–

* Dispose of the unused parts and the defective parts in
accordance with local environmental standards in effect.

REVISION HISTORY
REV.

DATE

NR

2022DE14

CHANGE DESCRIPTION

Initial release

Irina
Negoescu
NQF772001 VERSION 3

APPROVED BY:

Signature numérique de
Irina Negoescu
Date : 2022.12.14
11:23:13 -05'00'

WRITTEN BY

Devanand

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FT5328

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CLIENT

ORDER

New York City Transit New York - NYCT
New York City Transit New York - NYCT

ROAD NUMBER

VIN (2NVY/4RKY...)

QTY

FROM

TO

FROM

TO

LD08

8762

8763

L82J0M9778159

L82J7M9778160

2

LD08

8800

8800

L82J7M9778207

L82J7M9778207

1

New York City Transit New York - NYCT

LD08

8821

8821

L82J8M9778233

L82J8M9778233

1

New York City Transit New York - NYCT

LD08

8826

8826

L82J7M9778238

L82J7M9778238

1

New York City Transit New York - NYCT

LD08

8828

8850

L82J5M9778240

L82J3N9778268

23

New York City Transit New York - NYCT

LD08

8853

8858

L82J3N9778271

L82J6N9778278

6

New York City Transit New York - NYCT

LD08

8860

8860

L82J4N9778280

L82J4N9778280

1

New York City Transit New York - NYCT

LD08

8862

8867

L82J8N9778282

L82J7N9778306

6

New York City Transit New York - NYCT

LD08

8869

8871

L82J0N9778308

L82J9N9778310

3

New York City Transit New York - NYCT

LD08

8873

8874

L82JXN9778316

L82J1N9778317

2

New York City Transit New York - NYCT

LD08

8876

8877

L82J5N9778319

L82J1N9778320

2

New York City Transit New York - NYCT

LD08

8890

8891

L82J4N9778344

L82J2N9778357

2

New York City Transit New York - NYCT

LD23

—

9621

L82LXL9777634

L82L5L9777668

3

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NQF772001 VERSION 3

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FT5328

TOOLS REQUIRED:
•
•
•
•
•
•
•

Jig NT1090
Measuring Tape
Flathead screwdriver
10mm and 11mm socket wrench
Torque wrench
Torque seal
White sheet or cardboard

WARNING

Before proceeding with any adjustment, ensure that security stands are under the vehicle. Pressure in the
system must be a minimum of 120 psi (827 kPa).

NOTE

Make sure that the surface selected for the verification of the system is as level as possible.

1.1.

Run the bus.

1.2.

Make sure that there is sufficient air in the reservoirs (120 psi minimum at all times.) To do so, wait until
the pressure valve is released (engine running) or have continuous air supply.

1.3.

Park the vehicle on an even surface with the transmission on neutral.

1.4.

Apply the parking brake and set the master control switch to the stop position.

1.5.

Set the battery disconnect switch in the battery compartment to the off position

1.6.

Record the current height using the measuring tape at rear and front doors (See Figure 1).

Figure 1 - Measuring the Height of Front and Rear Doors

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NQF772001 VERSION 3

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1.7.

Raise the vehicle
NOTE

For more information on the raising and lowering of the vehicle, refer to section 18: HOISTING AND TOWING
of the Nova LFS maintenance manual. Respect your current internal safety procedures. Use the proper
hoisting equipment for your safety.
1.8.

If the wheels are not level between each other, adjust the lifts to allow the wheels to be level.

REAR LEVELING
1.9.

Locate the rear left air bag in front of the rear axle (See Figure 2).

Front of Bus

Figure 2 - Location of Rear Airbag

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NQF772001 VERSION 3

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FT5328

1.10.

Using the jig NT1090, measure the distance from the air spring mounting plate and the bottom of the air
bag structure to which the air bag is attached (See Figure 3).

1.11.

Once the jig is in place, tighten the knob and remove the jig from the location.

NOTE

Make sure the jig is not touching the ridge of the frame and that the jig is flush. See picture of the incorrect
condition.

Figure 3 - Measurement of Air Springs - Rear

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NQF772001 VERSION 3

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1.12.

After removing the jig, measure the distance from the top of A to the bottom of B at the center of the jig using
a measuring tape (See Figure 4). Confirm that the plate x plate distance is within the specification shown
on table 1.
Center
A

Top of A

B

Bottom of B

Figure 4 - Measuring the Distance From Top A to Bottom B

Rear ride height Plate x Plate on lift specification

9 1/2" ± 1/4”

Minimum

9 ¼”

Maximum

9 ¾”

Table 1 - Plate Distance

1.13.

If the plate x plate measurement is not within specification, move on to the next step to adjust the rear plate
x plate height.

1.14.

Using a flathead screwdriver, loosen up the clamp attached to the top of the p-mount.

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NQF772001 VERSION 3

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1.15.

To increase the distance between the air spring mounting plates, slowly slide the p-mount downwards and
the rod upwards.

1.16.

To decrease the distance between the air spring mounting plates, slowly slide the p-mount upwards and the
rod downwards (See Figure 5).
NOTE

Let the pneumatic system settle roughly 5 minutes before taking measurements between the air spring
mounting plates.

Clamp
P-mount
Rod

Figure 5 - Location of Airspring Mounting Plates

NOTE

The p-mount arm must be even with the p-mount or protrude slightly. It should never be inside the p-mount.

Once the leveling is
complete, the p-mount
arm must be even with
or protrude slightly from
the p-mount

Figure 6 - View of P-mount arm

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NQF772001 VERSION 3

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1.17.