6000 V6-260 4.3L DSL (1982)
Steering Gear: All Technical Service Bulletins
Rack & Pinion Power Steering Valve Ring - Service
Number
84-3-8A
Date
8/84
Subject:
RACK & PINION POWER STEERING VALVE RING SERVICE - 1982-1984 PHOENIX, 6000 AND 2000
1.
Valve Ring Information and Service
Orange color valve rings have been phased into 1984 production, replacing the green rings. The present green ring service kit, Part Number
7840573, may be used to replace orange rings as they are interchangeable.
Figure 1
The design intent is that valve rings will remain stationary in the bore of a power rack and pinion assembly. If hard steering, lack of assist when
started cold, etc.., is encountered with normal pump pressure, inspect the rack and pinion housing bore (see Figure 1).
Ring contact marks in the valve bore are normal. If ring groove wear exists, replacement of the housing is necessary to assure that replacement rings will
not eventually wear further into the housing and result in a recurrence of a lack of power assist symptom.
If only one or two of the four-ring contact marks in the housing have resulted in ring groove wear, the corresponding ring land of the valve is most likely
causing excessive ring drag. Inspect valve ring land for any imperfection or burr which may restrict ring rotation. Remove any burrs with a hone.
If replacement rings will not rotate freely on the valve, valve replacement is required.
In mid-year 1984, the rack and pinion housing valve bore will have a textured finish to further insure valve ring retention to the bore. The textured area
in the bore will be the circular band sealing ring surface corresponding to the four rings in the valve body.
NOTE:
1980-81 Phoenix power rack and pinion assemblies are to be serviced as instructed in Dealer Technical Bulletin 81-T-63 and Dealer Technical
Bulletin 81-T-64.
Service precaution on removal of valve and pinion assembly:
