Chevrolet 1977 10 Series, Repair Manual, Page: 43 / 468

STEERING 3B-1
SECTION 3B
STEERING
CONTENTS OF THIS SECTION
M anual Steering G ears.............................................................................3B-1
Power Steering P u m p ................................................................................3B-7
Integral Power Steering G e a r ............................................................... ..3B-12
C ontrol Valve - C orvette........................................................................ ..3B-24
Power C ylinder-C orvette.........................................................................3B-29
Special T o o ls............................................................................................. ..3B-30
MANUAL STEERING GEARS
INDEX
Overhaul O perations........................................................ ..3B-1
D isassem bly................................................................... ..3B-1
In sp ectio n .........................................................................3B-2
R epairs............................................................................ ..3B-3
Pitman Shaft/Wormshaft Seal R eplacem ent........ ..3B-3
Pitm an Shaft Bushing R eplacem ent.................... ..3B-3
Side Cover Bushing R eplacem ent..........................3B-3
W orm shaft Bearing Race R eplacem ent............. .3B-3
Ball N ut Servicing.....................................................3B-3
Assembly........................................................................3B-5
Adjustm ent on B e n c h ............................................... .3B-7
I
OVERHAUL OPERATIONS
Disassembly (Figs. 3B-1 through 3B-4)
As with any ball bearing unit the steering gear parts
m ust be kept free of dirt. Clean paper or rags should be spread
on the workbench before starting disassembly of the steering
gear.
1. Place the steering gear in a vise, clamping onto one
of the m ounting tabs. The worm shaft should be in a
horizontal position.
2. R otate the wormshaft from stop to stop, counting the
total num ber of turns. Then turn back exactly half way,
placing the gear on center (the worm shaft flat should be at
the 12 o’clock position). Loosen locknut.
3. Place a pan under the assembly to catch the lubricant
and remove the three self locking bolts attaching the side
cover to the housing.
4. Tap lightly on the end of the pitm an shaft with a
plastic ham m er and lift the side cover and pitman shaft
assembly from the gear housing (fig. 3B-5).
NOTE:
If the pitm an shaft sector does not clear the
opening in the housing easily, turn the wormshaft by
hand until the sector will pass through the opening in
the housing.
A D JU STER PLU G
L O C K N U T
, /
W O R M B E A R IN G
(L O W E R )
P IT M A N S H A F T
S E C T O R
W O R M
B E A R IN G
(UPPER)
BALL N U T
Fig. 3B-1~Steering Gear (Except Corvette)
Fig. 3B -2 -- S te e rin g Gear (Except Co rvette and G 10 -3 0 Series
T rucks)