3500 4x4 Pickup L6-359 5.9L DSL Turbo (1996)
Following the above procedures will expedite the processing of your claim.
If you have any questions or need assistance in completing this action, please contact your Zone Service Office.
Dealer Service Instructions
IMPORTANT
DEALER SERVICE INSTRUCTIONS
Safety Recall # 720-- Vacuum Check Valve
Revised June, 1997
Please remove and discard all prior recall notifications (mailed to dealers in May, 1997) from your files and replace it with this revised procedure.
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This service requirement applies only to 1995 and 1996 model year Dodge Ram (BR) trucks equipped with a 5.9L diesel engine ("C" in the 8th VIN
position) built from July 10, 1995 (MDH 071014) through July 1, 1996 (MDH 070114).
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The power brake booster vacuum hose on the above listed vehicles, may deteriorate due to oil contamination from the vacuum pump. If this occurs,
the vacuum supply to the power brake booster may be restricted and could cause a loss of power assist during repeated quick brake applications. In
addition, the oil contamination may cause other vacuum operated components to malfunction, such as the speed control servo, the heater/air
conditioning vacuum controls and the 4X4 front axle and transfer case vacuum controls. To prevent this condition, a check valve must be installed on
the engine vacuum pump and the brake booster vacuum hose must be replaced.
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If the vacuum pump on an involved vehicle has been replaced previously, the replacement pump may have an internal check valve. The threaded
vacuum hose nipple on pumps with an internal check valve have a larger hex head and a larger thread size. Therefore, the recall external check valve
will not fit, and is not required, on these vehicles. However, the vacuum hose assembly must be replaced.
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The torque specification for the new check valve has been reduced to 200 in-lbs (23 N.m). Disregard the reference to 38 ft-lbs listed in the parts
package instruction sheet.
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Effective immediately all repairs on involved vehicles are to be performed according to this Recall Notification. The Labor Operation Number for
TSB 24-16-96 is being canceled. Vehicles that have already had this repair performed, as determined from our warranty records, have been excluded
from this notification.
7 Year/Unlimited Mileage Vacuum Oriented component Warranty:
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Vehicles involved in this recall also have a 7 year warranty (with unlimited mileage) on all affected vacuum oriented components such as the power
brake booster, the speed control servo, the heater and air conditioning vacuum controls, and on 4X4 vehicles, the front axle and transfer case vacuum
controls. If any conditions covered by the extended warranty are found, now or in the future, dealers are to correct these conditions free of charge.
Refer to Warranty Bulletin D-97-1 0 to be issued in late May, 1997 for specific details of coverage. Parts for any of the covered components should
be ordered through the normal means.
Parts Packages:
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Each involved dealer to whom vehicles in the recall were invoiced will receive enough Check Valve Packages to service about 50% of those
vehicles.
Owner Letter
SAFETY RECALL TO INSTALL A CHECK VALVE ON
YOUR VEHICLE'S ENGINE VACUUM PUMP
Dear Ram Diesel Owner:
This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act.
Chrysler Corporation has determined that a defect which relates to motor vehicle safety exists in some 1995 and 1996 Dodge Ram trucks equipped with
a 5.9L diesel engine.
The problem is...
The power brake vacuum hose on your Ram truck, may deteriorate due to contamination with engine oil. This could restrict the vacuum supply to the
power brake booster and cause a loss of power assist during repeated quick brake applications. The brake warning light will turn on to signal system
impairment. If this warning is ignored, an increase in stopping distance could result in an accident.
In addition, the oil contamination may cause other vacuum operated components on your vehicle to malfunction, such as the heater and air conditioning
vacuum controls, the speed control servo and on 4X4 vehicles, the transfer case and front axle vacuum controls.
