1992 INTERNATIONAL HARVESTER 3900FC Recalls (7)

Campaign:
91V208000 on 11/26/1991
Component:
Steering:wheel and handle bar
Manufactured:
11/30/1990 - 10/31/1991
Affected:
62
Defect:
The pinch bolt connecting the upper steering column to the lower steering column may not have been properly tightened and separation of upper and lower steering columns can occur.
Consequence:
If the steering column separates while the bus is inmotion, loss of steering control and a vehicle crash can occur.
Correction:
Tighten the upper pinch bolt as required.
Notes:
System: steering.vehicle description: school buses equipped with adjustable steering columns.
Campaign:
92V096000 on 07/16/1992
Component:
Steering:hydraulic power assist:hose, piping, and connections
Manufactured:
08/31/1990 - 11/30/1991
Affected:
1,184
Defect:
The power steering return hose was incorrectly routed, and could kink and reduce power steering assist.
Consequence:
If the power steering return hose kinks and the powerassist is reduced or lost, it could result in loss of steering control andan accident.
Correction:
Install a new, correctly routed, power steering return assembly.
Notes:
System: power steering.vehicle description: school bus.
Campaign:
92V102000 on 07/30/1992
Component:
Fuel system, gasoline:storage:tank assembly
Manufactured:
08/31/1978 - 06/30/1992
Affected:
185,000
Defect:
The fuel system failed the crash barrier test.
Consequence:
The fuel tank was punctured, resulting in fluid lossgreater than allowed by fmvss 301, "fuel system integrity". fuel spills ina collision could lead to a vehicle fire if exposed to a source of ignition.
Correction:
Modify the fuel tank cage to comply with fmvss 301.
Notes:
System: fuel tank assembly; fmvss 301.vehicle description: school buses with 35 gallon or 65 gallon fuel tanks andfuel tank cage systems.note: it is important that all affected buses be remedied. however, the recallshould not cause parents or school officials to be unduly alarmed. nhtsa isunaware of any actual crashes in which the fuel system of a navistar chassisruptured. many of the school buses involved in the recall have been in servicefor more than 12 years, and there has not been a single recorded fatalitybecause of a fire.
Campaign:
93V092000 on 05/26/1993
Component:
Suspension:rear:springs:air suspension system
Manufactured:
12/31/1989 - 02/28/1993
Affected:
193
Defect:
The pressure relief valve was omitted in the air tank. the air tank is the reservoir for the air suspension and is not brake related. without the pressure relief valve, there is no back-up system to limit air pressure in the air suspension system.
Consequence:
Lack of a back-up system to limit air pressure build upcan cause excessive pressure in the air tank and can cause the tank to rupture.this can result in personal injury to anyone in the vicinity.
Correction:
Install a pressure relief valve in the air tank.
Notes:
System: suspension.vehicle description: school buses: models 4700 and 4900; heavy trucks: models3600, 3700, 3800, and 3900fg; incomplete chassis: model 1652sc.
Campaign:
93V112000 on 07/11/1993
Component:
Fuel system, gasoline:storage:tank assembly:mounting
Manufactured:
02/28/1991 - 09/30/1991
Affected:
10,629
Defect:
The fuel tank cage assembly bolts mounting the vertical straps to the horizontal angle were assembled with the threaded end of the bolts facing the fuel tank.
Consequence:
If the fuel tank cage is struck with sufficient force itis possible for the bolts to pierce the fuel tank and cause fuel leakage.fuel leakage exposed to a source of ignition can result in a fire.
Correction:
The fuel tank cage mounting bolts will be removed and reinstalled with the bolt head toward the tank.
Notes:
System: fuel system; fuel tank assembly; fmvss 301.vehicle description: school bus chassis.
Campaign:
93E029004 on 10/24/1993
Component:
Service brakes, hydraulic:foundation components:master cylinder
Manufactured:
06/30/1992 - 04/30/1993
Affected:
4
Defect:
A gap between the master cylinder and remote brake fluid reservoir adapter, caused by an out-of-specification condition of the adapter, results in brake fluid loss during brake application.
Consequence:
Brake fluid loss results in loss of pressure causingpartial loss of braking ability, which may lead to an accident.
Correction:
Replace the out-of-specification adapters.
Notes:
System: brakes; master cylinder.equipment description: alliedsignal inc. braje master cylinders supplied tooem's of school bus, motorhome and shuttle bus chassis.notes: alliedsignal inc. initiated this campaign.if you have problems exchanging the fluid reservoir adapters you can obtainassistance by following the procedure described in the owner assistance guidesection in your owner's manual. also, contact the national highway trafficsafety administration's auto safety hotline at 1-800-424-9393.
Campaign:
94V234000 on 11/30/1994
Component:
Service brakes, hydraulic:power assist:hydraulic
Manufactured:
04/30/1991 - 02/28/1993
Affected:
62
Defect:
The hydraulic brake system on these buses uses two hydraulic pressure switches to operate the brake lights and the brake booster pump. the brake pressure warning light can activate when actual system failure has not occurred.
Consequence:
A false warning of the brake pressure warning light can cause the driver to ignore a warning when an actual problem exists which could result in an accident.
Correction:
Dealers will replace the two hydraulic pressure switches with one mechanical switch that is activated by brake pedal stroke.
Notes:
System: brakes; power assist; hydraulic system.vehicle description: school and transit buses built with hydraulic brakes.note: if the vehicle is presented to an authorized dealer on an agreed upon service date and the remedy is not provided free of charge within a reasonable time or the remedy does not correct the defect, please contact navistar at 1-800-448-7825. also, contact the national highway traffic safety administration's auto safety hotline at 1-800-424-9393.

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