SB 3101
Service Bulletin Details
Public Details for: SB 3101
This service bulletin informs affected customers that zf friedrichshafen ag has released a service information bulletin regarding checking axle hubs and wheel heads if an abs tell-tale lamp is activated during coach operation on mci j model
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Service Bulletin No. 3101
MODEL
J4500
TYPE
SECTION/GROUP
Service Information
DATE
2-Axle
March 2, 2017
SUBJECT
ZF AXLE HUBS AND WHEEL HEADS
CONDITIONS
Service Information Only
Description:
MCI is notifying customers of ZF Friedrichshafen AG ("ZF") release of the attached Service Information regarding
checking axle hubs and wheel heads if an ABS tell-tale lamp is activated during coach operation.
MCI and ZF advise that immediate action is required when the ABS tell-tale lamp actuates during coach operation.
If the ABS tell-tale lamp actuates during coach operation, the operator must safely drive the coach to a safe
location and inspect all six wheel ends for an overheat condition.
Should an overheat condition exist in a hub or wheel head, or oil / grease is present on the wheel, the coach must
not be driven or towed until inspected by a qualified technician.
The coach must be transported by a flatbed in this condition.
Towing a coach in this condition will result in further component damage.
Refer to Section 4 / Brakes, in the MCI J4500 Maintenance Manual, in conjunction with this
service information bulletin.
Refer to the attached ZF Service Information letter for further information.
ZF confidential
Service Information
Date: 17/01/17
ZF CV
RL80E & A132
Hub & Wheelhead
Axle
Models
Assembly groups
ALL
MCI
ZF Services
OEM/Customer
Early warning: ABS dash light active
Possible wheel head bearing damage
Immediate action is required by the vehicle operator if the ABS dash light becomes active
during vehicle operation.
1. The operator must find the next safe place to pull off the road to inspect the steer and
tag axle hubs and the drive axle wheelheads.
2. Hub and wheelhead inspection includes a visual check and a temperature check
a. Look for oil or grease on the wheels coming from the hub or wheelhead
b. Carefully check the temperature of the hubs and wheelheads by touching and
comparing with the hubs and wheelheads on the other end of the axle.
3. If there is oil/grease present or if the a hub or wheelhead feels hot to the touch as
compared to the opposite side, then the vehicle must be taken out of service to be
inspected by an authorized service technician.
Example: Drive Axle Wheelhead
ZF Services, LLC
1-847-478-6868
777 Hickory Hill Dr.
Vernon Hills, IL 60061