1991 Kenworth W900b Recalls

---

NHTSA Campaign Number: 93V172000
Manufacturer: PACCAR INCORPORATED
Manufactured Begin Date: October 1st, 1991
Manufactured End Date: October 1st, 1993
Date of Owner Notification: December 20th, 1993

Defect Summary:
THESE TRUCKS DO NOT HAVE THE PROPER CUTOUT IN THE FRONT DROP RAIL SECTION OF THE FRAME RAIL. WITHOUT THE PROPER CUTOUT, THE STEERING DRIVELINE GREASE FITTING WILL INTERFERE WITH THE FLANGE OF THE CHASSIS RAIL.

Consequence Summary:
STEERING DRIVELINE INTERFERENCE WOULD PREVENT PROPERSTEERING CONTROL. THE CONDITION CAN RESULT IN LOSS OF STEERING CAPABILITY.

Corrective Summary:
DEALERS WILL INSPECT FOR PROPER CUTOUT AND ADEQUATE CLEARANCE WITH THE GREASE FITTING. IF ADEQUATE CLEARANCE DOES NOT EXIST, A CUTOUT WILL BE ADDED TO THE DROP RAIL.

Recall Notes:
SYSTEM: STEERING; LINKAGES.VEHICLE DESCRIPTION: MEDIUM DUTY TRUCKS EQUIPPED WITH A FORWARD MOUNTED SHEPPARDM100 STEERING GEAR.

---

NHTSA Campaign Number: 91V090000
Manufacturer: PACCAR INCORPORATED
Manufactured Begin Date: May 1st, 1988
Manufactured End Date: August 1st, 1990
Date of Owner Notification: September 30th, 1991

Defect Summary:
SPRAGUE WIPER ASSEMBLY PIVOT CAN SEIZE DUE TO GALVANIC CORROSION BETWEEN THE ZINC-PLATED STEEL SHAFT AND THE BRONZE BUSHINGS.

Consequence Summary:
THIS CORROSION CAN CAUSE WIPER ARM/BLADE ASSEMBLY TO STOPWIPING WINDSHIELD, THIS COULD AFFECT DRIVER VISIBILITY AND RESULT IN ANACCIDENT.

Corrective Summary:
REPLACE SPRAGUE WIPER ASSEMBLY PIVOT WITH AN ASSEMBLY NOT SUSCEPTIBLE TO GALVANIC CORROSION.

Recall Notes:
SYSTEM: WIPER ASSEMBLY PIVOT.VEEHICLE DESCRIPTION: HEAVY TRUCKS EQUIPPED WITH SPRAGUE WIPER ASSEMBLY PIVOT.

---

NHTSA Campaign Number: 91V066000
Manufacturer: PACCAR INCORPORATED
Manufactured Begin Date: April 1st, 1990
Manufactured End Date: September 1st, 1990
Date of Owner Notification: August 1st, 1991

Defect Summary:
THE ENGINE FAN MAY EXPERIENCE A RESONANT FREQUENCY CAUSING PREMATURE FAN FAILURE, AND SEPARATION FROM THE ENGINE.

Consequence Summary:
ENGINE FAN SEPARATION CAN CAUSE DEATH OR INJURY TO ANYPERSON IN THE PATH OF THE FAN.

Corrective Summary:
REPLACE ENGINE FAN WITH FAN FROM ANOTHER MANUFACTURER.

Recall Notes:
SYSTEM: ENGINE FAN.VEHICLE DESCRIPTION: HEAVY TRUCKS EQUIPPED WITH FLEX-A-LITE ENGINE FANS.