K 30 P/U 4WD V6-262 4.3L (1985)
Power Steering Pump Seal: Technical Service Bulletins
P/S - Submerged Style Pump "O" Ring Change
85-41
UPC 3B(IX)
FEB., 1985
Subject:
POWER STEERING SUBMERGED STYLE PUMP "O" RING CHANGE
Model and Year:
1985 MODELS
TO:
ALL CHEVROLET DEALERS
SEAL SELECTION
Power steering pumps on some 1985 models have revised "square cut" seals which provides the seal between the reservoir and the housing at the
reservoir mounting bolt hole(s) and at the pressure line fitting. This change is effective with early 1985 production on all submerged pump assemblies.
The new seal is approximately twice as thick as the old one and requires a deeper counterbore in the housing. Consequently, new seals will not fit the old
housings and old seals will not provide an adequate repair when used with the new housing. The new housing will be the only one provided for service
from WDDGM. Both old and new seals will be provided in each appropriate reservoir kit and in a new seal service kit, part No. 7848522 which will
replace the present kit, part No. 5688044.
These kits will contain an instruction sheet which shows the method of identifying the new housing, and shows the difference between the new and old
seal. (See Illustration)
There has been a design change in the hydraulic pump housing. Look at the mounting pad shown. If the mounting pad shows a stamped "X" use the three
thicker square cut O-ring seals provided in this kit.
