Technical Service Bulletins
Search 172,063 manufacturer communications covering 879 vehicle makes from 1955 to 2025.
Showing 346 bulletins for IC BUS
19513
Oct 7, 2019
160000 STRUCTURE
The emergency roof hatch external release handle may break and prevent the hatch release mechanism from being actuated from outside the vehicle. However, failure of the external release handle does not prevent actuation of the release mecha
19514
Oct 7, 2019
160000 STRUCTURE
The emergency roof hatch external release handle may break and prevent the hatch release mechanism from being actuated from outside the vehicle. However, failure of the external release handle does not prevent actuation of the release mecha
19511
Sep 16, 2019
150000 SEAT BELTS
Long term cycle fatigue (buckling and unbuckling the seat belt) may cause the plastic fingers on the male portion of the buckle to crack and break off resulting in an increase in force necessary to latch the seat belt buckle.
IK1201389
Sep 11, 2019
060000 ENGINE AND ENGINE COOLING
Cummins ISB Fan Drive Belt Chirp; Cummins ISB and Cummins B6.7
19512
Sep 5, 2019
060000 ENGINE AND ENGINE COOLING
An unintended engine start could occur when the ignition key is in the run position and the transmission is in the park or neutral position. Only models with PSI gasoline or propane engine and C7 Body Control Module (BCM).
K0500061
Aug 19, 2019
010000 STEERING
CE Bus Steering Returnability Diagnostics. Only CE buses built during 1/29/2018 thru 6/11/2019 with Tilt Columns, ESP, and Steering Switch Controls. 2019 and 2020 Model year only
19506
Jul 11, 2019
040000 SERVICE BRAKES, AIR
The ADB22X caliper on the left (driver side) rear corner on school bus applications may experience an unintended reduction in running clearance during operation, which can lead to a dragging brake. The problem occurs intermittently.
19507
Jul 11, 2019
040000 SERVICE BRAKES, AIR
The ADB22X caliper on the left (driver side) rear corner on school bus applications may experience an unintended reduction in running clearance during operation, which can lead to a dragging brake. The problem occurs intermittently.
19101
Jun 20, 2019
355100 EQUIPMENT:OTHER:LABELS
The required Evaporative Emission label may have been printed with an incorrect engine family and/or model year for the engine installed at time of manufacture. Only models with PSI gasoline or propane engines.
IK0500061
Jun 5, 2019
010000 STEERING
CE Bus Steering Returnability Diagnostics. Only models with Tilt Columns, ESP, and Steering Switch Controls
IK2200002
Feb 7, 2019
110000 ELECTRICAL SYSTEM
Child Reminder (CRS) Post Trip Inspection System; operation and troubleshooting information. Feature code 47BGR, 47DXR, or 47MZP
IK1400004
Feb 5, 2019
022000 SUSPENSION:REAR
Compressor Cycles While Driving/Dual Leveling Valve Adjustment Procedure; only models with feature code 14WAS (Dual Height Control Valves on Rear Suspension)
18117
Jan 28, 2019
350000 EQUIPMENT
Certain buses may have been built without a CH545 Key (matched key) Vandal Lock as ordered by the customer.
REC18517
Dec 20, 2018
040000 SERVICE BRAKES, AIR
The brake air line tube from the relay valve port to the left brake modulator valve may be improperly routed resulting in a kinked air line.
IK0900132
Dec 18, 2018
060000 ENGINE AND ENGINE COOLING
Bus coolant hose kink; only models with propane or gasoline engines
18119
Dec 13, 2018
060000 ENGINE (PWS)
Certain buses may have been built with the fan drive misaligned to the fan drive gearbox resulting in possible wear of the splines on the gearbox shaft.
IK1300169
Dec 6, 2018
070000 FUEL SYSTEM, GASOLINE
Bus Lacking Power Climbing a Hill; only models with PSI 8.8L gasoline engine
IK0800564
Nov 6, 2018
110000 ELECTRICAL SYSTEM
Child Checkmate is not functioning correctly; Only buses with features 47EXC, 47EXD, 47EXE built from 4/18/16 to 5/15/17
IK0400016
Nov 5, 2018
030000 SERVICE BRAKES, HYDRAULIC
Aggressive Brakes with Air Brake Foot Valve Leak on Bus; only models with feature code 04WEA - Parking Brake Interlock - With Air Brakes Only
IK2600215
Nov 5, 2018
110000 ELECTRICAL SYSTEM
Applying Advanced Logic Templates; only models equipped with a BCM or ESC
IK1300168
Oct 23, 2018
100000 POWER TRAIN
Procision Transmission No Start, stuck in gear, and service lamp; only models with Trans Feature codes 13GBX, 13GBY, 13GBZ, 13GCA, 13GYU, 13GYV, 13GYW, 13GYX and software level 5567510.
REC18512
Oct 17, 2018
030000 SERVICE BRAKES, HYDRAULIC
The spring actuated parking brake chamber may have been improperly crimped to the service brake chamber section of the brake chamber assembly resulting in an air leak in the service brake and possible separation of the spring brake chamber.
REC18513
Oct 17, 2018
030000 SERVICE BRAKES, HYDRAULIC
The spring actuated parking brake chamber may have been improperly crimped to the service brake chamber section of the brake chamber assembly resulting in an air leak in the service brake and possible separation of the spring brake chamber.
REC18V-563-18E-0
Oct 4, 2018
350000 EQUIPMENT
The wheelchair lift positioning input cam may fail while the lift is in use resulting in a disabled cutoff switch.