NHTSA ID Number: 10116325
Manufacturer Communication Number: APS3137E
TSB/Document Date: 2017-08-25
Summary
Rear axle brake system,Irregular vehicle movement at very low speed
SERVICE PRODUCT
IMPROVEMENT
REFERENCE:
Nova Bus
Manuals
SECTION:
08: Braking system
RS NO:
MQR 7621-534
APS3137E
APPLICATION DEADLINE:NA
–
EFFECTIVE IN PROD.:
SUBJECT:
Rear axle brake system
JUSTIFICATION:
Irregular vehicle movement at very low speed
LEVEL
1
SAV.1E.2012MA
DIRECT CHARGES
DESCRIPTION
Remove the rear axle brake drift valve
2
–
TIME
LABOUR
MATERIAL
Client
Client
45 min
–
–
–
MATERIAL
QTY
PART NO
REV.
DESCRIPTION
REPLACES PART N°
1
0444626
–
Plug M-NPT-3/8
–
2
12010300
–
Cavity plug metri pack
–
1
15300002
–
2-pin connector Metri pack
–
20 in.
8861149
–
Tubing ½ in. diameter green color
–
2
N21529
–
Elbow 45 NTA-8, NPT-M-6
–
–
–
–
–
LEVEL 1
LEVEL 2
–
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
2014-AL15
APPROVED BY:
CHANGE DESCRIPTION
Initial release
Daniel Theriault
WRITTEN BY
Wilder Galiano
Digitally signed by Daniel Theriault
DN: cn=Daniel Theriault, o=Nova Bus, ou=Publication,
email=daniel.theriault@volvo.com, c=CA
Date: 2014.04.08 13:19:11 -04'00'
PAGE 1 OF 7
SERVICE PRODUCT
IMPROVEMENT
CLIENT
ORDER
ROAD NUMBER
SAV.1E.2012MA
APS3137E
VIN (2NVY/4RKY...)
FROM
TO
FROM
TO
QTY
New York City Transit - New York
L536
1200
1201
S92U793000490
S92U993000491
2
New York City Transit - New York
L545
1202
1289
S92U5A4000001
S92U0A4000098
88
New York City Transit - New York
L643
5895
5895
S92U1B4000143
S92U1B4000143
1
New York City Transit - New York
L670
5770
5894
S92U4C4500024
S92U3B4000242
125
New York City Transit - New York
L681
5896
5283
S92U2C4500023
S92U9C4500195
122
New York City Transit - New York
L692
5284
5363
S92U3C4500158
S92U3D4500274
80
PAGE 2 OF 7
SERVICE PRODUCT
IMPROVEMENT
SAV.1E.2012MA
APS3137E
WARNING
Follow your internal safety procedures.
PROCEDURE
1.1.
Locate the drift valve enclosure.
1.2.
Remove the enclosure cover. Retain the hardware.
Enclosure location
Figure 1 - Enclosure Location
1.3.
Disengage the drift valve electric connector.
1.4.
Install the 12010300 cavity plug into the 15300002 2-pin connector.
1.5.
Install the 15300002 connector into the female harness connector.
12010300
cavity plug
15300002 2-pin connector
Female harness connector
Figure 2 - Harness Connector Weather Protection
PAGE 3 OF 7
SERVICE PRODUCT
IMPROVEMENT
1.6.
Disconnect the air hoses connected to the drift valve and double relay valve.
1.7.
Discard the hoses shown in Figure 3.
SAV.1E.2012MA
APS3137E
Discard hoses
Figure 3 - Hoses to be Disconnected
1.8.
Remove the bolts holding the double relay valve. Retain the hardware.
1.9.
Remove the bolts holding the drift valve. Take out the assembly from the enclosure. Reinstall the hardware.
Figure 4 - Valve Assembly Removal
PAGE 4 OF 7
SERVICE PRODUCT
IMPROVEMENT
1.10.
SAV.1E.2012MA
APS3137E
Remove the valve from the T connector.
5000 series
valve
T connector
1200 series
valve
T connector
5000 series valve
1200 series valve
Figure 5 - Remove 1200 or 5000 Series Valve
1.11.
Disassemble the drift valve from the double relay valve.
1.12.
Discard the drift valve.
Drift valve
Double relay valve
Figure 6 - Remove the Drift Valve
PAGE 5 OF 7
SERVICE PRODUCT
IMPROVEMENT
1.13.
Install and tighten a 0444626 plug connector to the T connector.
1.14.
Install a new N21529 connector to the double relay valve.
1.15.
Install a new N21529 connector to the existing assembly.
SAV.1E.2012MA
APS3137E
N21529 elbow
N21529 elbow
Elbow installation
-Hand tighten the elbow
-With a wrench, tighten an
additional 1 ½ to 2 ½ turns
0444626 plug
connector
Figure 7 - Fittings Installation
1.16.
Install the dual relay valve with the retained hardware in the enclosure.
1.17.
Connect the three existing air hoses.
Connect
hoses
Nylon air hose installation
-Insert the hose
-Hand tighten the nut
-With a wrench, tighten an
additional 4 turns
Connect hose
Figure 8 - Hoses Installation
PAGE 6 OF 7
SERVICE PRODUCT
IMPROVEMENT
SAV.1E.2012MA
APS3137E
1.18.
Cut to size the 8861149 air hose that connects the next assembly to the double relay valve.
1.19.
Connect the air hose.
Double relay valve
8861149 air hose
Next assembly
Nylon air hose installation
-Insert the hose
-Hand tighten the nut
-With a wrench, tighten an
additional 4 turns
Figure 9 - New 8861149 Hose Installation
1.20.
Test for any air leaks in the air hose installation before closing the compartment. Fix any air leaks.
1.21.
Reinstall the enclosure cover with the retained hardware.
PAGE 7 OF 7
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
- Ideal for hydraulic and disc brakes
- Provides an extra margin of safety in extreme braking...
- Mix of polyglycol ethers ensures hot brake-system operation...
- Excellent for ABS, disc and drum brake systems
- Delivers braking power when needed by avoiding a spongy...
- Both wet and dry boiling points exceed the minimum...
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TSB/Document ID: APS3137E
Replacement Service Bulletin Number:
MFR Communication Date: 2014-04-09
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SERVICE BRAKES
MFR Component System:
MFR Component Subsystem:
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