9999 MIDLAND AIR DRYER Recall

Campaign:

94E005000 on 03/16/1994

Component:

Service brakes, air:supply:hoses, lines/piping, and fittings

Manufactured:

07/31/1992 - 05/31/1994

Affected:

45,000

Defect:

The air dryer of the air brake system collects water which can freeze, causing the high pressure relief valve not to open during an overpressure condition and block the air line from the dryer to the air brake system. if this condition exists and if overpressure of over 1500 psi occurs, the air dryer housing or the dessicant cartridge may explode. also, a manufacturing process causes an early fatigue failure of the dessicant cartridge.

Consequence:

Should the air dryer system explode, it could result ininjuries to persons near the system.

Correction:

A modification kit or replacement pap air dryer will be provided to customers.

Notes:

System: brakes; air dryer.equipment description: pap air dryer, part nos. n4250, n4250a, da33100, da33110,da333100x, and da33110x.notes: the brake system's one-way check valve will prevent complete failure ofthe brake system. however, if the brakes are used, the brake air pressure willdecrease and the low pressure warning system will give an indication of lowpressure before the spring brakes start to apply.if your vehicle is presented to an authorized dealer on an agreed upon servicedate and the remedy is not provided within a reasonable time and free of chargeor the remedy does not correct the defect or noncompliance, please contactmidland-grau service center at 1-816-891-2470. also, contact the nationalhighway traffic safety administration's auto safety hotline at 1-800-424-9393.

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