Technical Service Bulletin FSB 593-013A — 2014 MACK CHU
POWER TRAIN
Bulletin Details
| TSB ID | FSB 593-013A |
| Manufacturer | |
| Vehicle | 2014 MACK CHU |
| Component | POWER TRAIN |
| Communication Date |
Bulletin Summary
GRADE GRIPPER SOLENOID, REPLACEMENT. ON SOME MACK CHU, CXU, GU, AND TD TRUCK MODELS BUILT BETWEEN 04/31/2008 AND 11/30/2015, THE SOLENOID VALVE FOR THE GRADE GRIPPER FEATURE IS PRONE TO INTERNAL CONTAMINATION IN HARSH ENVIRONMENTS. THE INTERNAL CONTAMINATION OF THE SOLENOID VALVE IS CAUSED BY THE BUILDUP OF GRIME, SALT, ROAD DEBRIS AND OTHER SOLID CONTAMINANTS. IN SOME CASES, THE BUILDUP OF SOLID CONTAMINANTS CAUSED THE SOLENOID VALVE TO MALFUNCTION. A SIMILAR MALFUNCTION IS POSSIBLE IF THE SOLENOID VALVE IS EQUIPPED WITH A VENT FITTING THAT FREEZES OVER. THE MALFUNCTION CAUSES THE TRAILER BRAKE CIRCUIT TO MAINTAIN TRAILER BRAKE PRESSURE AFTER A GRADE GRIPPER EVENT.
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.
Other TSBs for the 2014 MACK CHU
M-451-001
SUSPENSION:FRONT
KC-629
EQUIPMENT
K16925952
EQUIPMENT:ELECTRICAL
FSB431-010
POWER TRAIN
FSB 514-001
SERVICE BRAKES
PI 0859-04
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
PI 0859
FORWARD COLLISION AVOIDANCE: SENSING SYSTEM: RADAR
FSB 431-010
POWER TRAIN:AUTOMATIC TRANSMISSION
FSB 513-001
SERVICE BRAKES, ELECTRIC
371-040
SERVICE BRAKES, AIR:ANTILOCK