Height Sensing Valve - Modification and Adjustment: Overview
88AMCjeep02Models
1986-88 Comanche With Metric Ton Option
Subject
Height Sensing Valve Modification & Adjustment With New Heavy Duty Rear Leaf Spring
Index SUSPENSION
Date
May 9, 1988
No. 02-51-88
(C02-51)
P-1787
A new heavy duty rear leaf spring for 1986-88 Comanche vehicles with the optional metric ton package is now available for service use. The new spring entered production on November 9, 1987, and will be the only heavy duty spring supplied for service.
The new springs require new U-bolts and new U-bolt nuts for installation.
The installation of new springs on vehicles built before November 9, 1987 requires the installation of a new design height sensing brake proportioning valve lever, lever bushing and linkage rod.
Additionally, a new proportioning valve adjustment gauge (67~), tool number 6221, and a new bushing installation tool, number 6224, are required to correctly position the proportioning valve shaft and to install the lever.
Both tools are part of a new tool set that has been sent to Jeep/Eagle dealers.
A third piece of the tool set is a proportioning valve adjusting gauge (53~), tool number 6213, that is used when adjusting the proportioning valve on 1986-1987 vehicles that are not equipped with the new heavy duty springs.
Replace the rear leaf springs, brake proportioning valve lever and linkage rod using the following repair procedure.