NHTSA ID Number: 11014493
Manufacturer Communication Number: 842-2 Hub Bearing
TSB/Document Date: 2025-02-25
Summary
In a small number of instances the drive axle hub bearing has been found to lose axial preload. This bulletin has been re-issued to advise customers of a change to the previously published maintenance interval.
Alexander Dennis
Dennis Way, Guildford,
Surrey, GU1 1AF.
After Market Support Line:
0845 358 9988 (U.K.)
+44 (0) 1483 571271
Service Manual Heading:
Models Affected:
Enviro 500
Date:
Aug 2013
Page:
1 of 2
Service Bulletin
Transmission
Title:
No:
Hub Bearing Maintenance
D64.1 Portal Axle
842-2
Background
In a small number of instances the drive axle hub bearing has been found to lose
axial preload. This bulletin has been re-issued to advise customers of a change to
the previously published maintenance interval.
Scope of Bulletin
This bulletin describes the recommended maintenance regime for D64.1 axles
fitted with the unitized hub bearing.
Maintenance Interval
At the first vehicle service (1000 miles – 1600 km), or 6 months in service,
whichever is the earlier.
If the vehicle annual operating mileage is less than 30,000miles (48,000km) then
the following wheel hub maintenance is to be done once every year.
If the vehicle annual operating mileage is greater than 30,000miles (48,000km)
then the following wheel hub maintenance is to be carried out every 30,000miles
(48,000km) or once every 6 months, whichever is earlier.
In addition to the above frequency, it is recommended to perform the wheel hub
maintenance when the brakes or any other wheel end component is serviced.
Important Note:
Before carrying out any work on the axle ensure that all procedures used are in
accordance with the relevant Service Manual and Health & Safety Instructions.
Maintenance Procedure
1. Firstly ensure that the tightening torque of the spindle nut is to the correct
tightening torque specification
Hub Nut Tightening Torque Specification: 900 – 1000 Nm
(continued overleaf)
Last Bus Bulletin Issued: 864
Service Manual Heading:
Models Affected:
Enviro 500
Date:
Aug 2013
Page:
2 of 2
Transmission
Title:
No:
Hub Bearing Maintenance
D64.1 Portal Axle
842-2
Maintenance Procedure (continued)
2. Using a dial indicator gauge measure the mounted hub bearing end play figure.
The tolerance specifications are as follows:
Hub Bearing End Play Tolerance Specification
For a new bearing in a new hub the maximum tolerance for end play is 0.075mm
For a new bearing in a used hub the maximum tolerance for end play is 0.105mm
For a used bearing in a used hub the maximum tolerance for end play is 0.200mm
3. If mounted hub bearing endplay figure is found to be above the tolerance
specification the bearing should be replaced.
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TSB/Document ID: 842-2 Hub Bearing
Replacement Service Bulletin Number:
MFR Communication Date: 2013-08-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
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