Technical Service Bulletin FSB 593 013 — 2008 MACK CXU
ELECTRICAL SYSTEM:WIRING:RELAYS/SOLENOIDS
Bulletin Details
| TSB ID | FSB 593 013 |
| Manufacturer | |
| Vehicle | 2008 MACK CXU |
| Component | ELECTRICAL SYSTEM:WIRING:RELAYS/SOLENOIDS |
| Communication Date |
Bulletin Summary
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. Replacement of the existing solenoid valve, elbow, and the addition of a new tube fitting and tube will ensure proper functionality of the grade gripper feature.
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 2008 MACK CXU
M-874-003
VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
M-261-006
ENGINE AND ENGINE COOLING
M-265-001
SERVICE BRAKES, AIR
K91214678
EQUIPMENT
K82320750
POWER TRAIN:CLUTCH ASSEMBLY
K28449505
LANE DEPARTURE
PI-0796
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)
PI-0780
SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY:U-BOLT, LEAF SPRING TO AXLE
SB-730003
ELECTRICAL SYSTEM:WIRING
SB-12-1043
SUSPENSION