DEFECT #1 - LATCHES/LOCKS/LINKAGES

Description
On certain vehicles, the endstop for the secondary cab lock hook may experience abnormal wear.  This can prevent the hook and latching bracket from engaging when the cab is powered.

Consequence


Corrective Action
The dealer will install a guide for the secondary cab lock hook, and replace existing hook with a modified version free of charge.

Notes
Vehicle description: trucks, cab over engine models.system: structure; cab lock hook.consequences of defect: if hook and latching bracket do not engage, the cabcould tilt without warning.  Loss of vehicle control and an accident couldoccur.

DEFECT #2 - SERVICE BRAKES, HYDRAULIC: FOUNDATION COMPONENTS: MASTER CYLINDER

Description
The involved vehicles may have been assembled with an incorrectly manufactured brake master cylinder tilting valve.  These defective tilting valves may develop internal leakage with many brake applications and cause hydraulic brake pressure loss in one or both vehicle brake circuits.

Consequence


Corrective Action
Dealer will equip all affected vehicles with the correct tilting valves at no cost to owner.

Notes
Vehicle description: trucks.system: service brakes; master cylinder.consequences of defect: loss of hydraulic brake pressure will result in loss ofbraking efficiency which could lead to loss of vehicle control and an accident.

DEFECT #3 - STEERING: WHEEL AND HANDLE BAR

Description
Operation under extreme conditions of high humidity, salt and dirt can cause rusting of the splined section of the upper steering shaft.  This causes increased stresses between the steering column universal joint connection and the input shaft of the steering gear.  Continued operation under these conditions could result in unacceptable motion of the linkages.

Consequence


Corrective Action
All affected vehicles will be equipped with a grease fitting on the splined section of the upper side of the universal joint.

Notes
Vehicle description: trucks.system: steering; shaft-upper, splined section.consequences of defect: the resultant damage to the connection could eventuallylead to a loss of steering control and an accident.note: excess play in the steering wheel is an indication of damage in thesteering system.