Comanche 2WD L4-150 2.5L VIN H TBI (1988)
Technical Service Bulletin # 025188
Date: 880509
Height Sensing Valve - Modification & Adjustment
Models
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.
Parts Required
The following parts are required when installing replacement heavy duty rear leaf springs on Comanche vehicles built before November 9, 1987.
2
Spring, Rear Leaf
PN
52003676
4
U-Bolts
PN
52003678
8
Nut, U-Bolt
PN
11502814
1
Lever Assembly
PN 52003681
1
Linkage Rod
PN
52003679
Repair Procedure
This repair involves installing new leaf springs, new height sensing brake proportioning valve lever, lever bushing and linkage rod.
1.
Remove the original rear leaf springs and install the new springs as described in the M.R. 277 manual.
WARNING:
THE BRAKE PROPORTIONING VALVE ADJUSTMENT AND THE SUBSEQUENT LEVER AND LINKAGE ROD
REPLACEMENT MUST BE PERFORMED WITH THE VEHICLE AT CURB WEIGHT (UNLOADED) ON A FLAT LEVEL
SURFACE. FAILURE TO DO SO COULD RESULT IN UNSATISFACTORY BRAKE PERFORMANCE.
NOTE:
THE PROPORTIONING VALVE (A) IS MOUNTED TO A BRACKET WHICH IS ATTACHED TO THE UNDERBODY.
