Chevrolet 10 Series 1970 Service Manual page 527

NOTE: I f pump p ro ve s faulty in test number
two, test should be repeated a fter pump is r e ­
p a ired and installed in veh icle. T h is w ill provide
COMPONENT REPLACEMENT AND REPAIRS
POWER STEERING PUMP
Removal
1. D isconnect hoses at pump.
nected, secure ends in ra ised position to prevent
drainage of o il. Cap o r tape the ends of the hoses to
preven t entrance of dirt.
2. In stall two caps at pump fittin gs to prevent drainage
o f o il fro m pump.
3. Loosen bracket-to-pum p mounting nuts.
4. R em ove pump belt.
5. R em ove bracket-to-pum p
fro m veh icle.
6. R em ove d riv e pulley attaching nut.
7. R em ove pulley fro m
o ff shaft as this w ill
J - 21239-1 fo r pulling
J-8433-1 with Adapter J-8433-2 fo r
Installation
1. In sta ll pump pulley.
C A UTIO N: Da not ham m er on pump shaft. Use
pulley nut to pull pu lley onto shaft.
2. P o s itio n pump assem bly on veh icle and in stall at­
taching parts lo osely .
3. Connect and tighten hose fitting.
4. F i l l r e s e r v o ir . B leed pump by turning pulley back­
ward (cou n ter-clock w ise as view ed from fron t) until
a ir bubbles cease to appear.
5. In stall pump b elt o v e r pulley.
6. Tension b elt as outlined under "Pum p B elt Tension—
Adjustm ent" in this section.
7. B l e e d as o u t l i n e d
A dju stm en ts."
POWER STEERING GEAR (Figs. 25 and 2 6)
Removal
1. M ark steerin g shaft to stub shaft relationship and
disconnect the steerin g shaft fro m the lo w e r coupling.
2. R em ove hoses from g e a r assem bly.
3. R em ove pitman arm bolt, nut, washer and pitman
arm .
4. R em ove mounting b olts and steerin g gear.
Installation
1. In stall pow er steerin g g ea r on veh icle by re v e rs in g
rem o va l procedure.
NOTE: A ll steerin g gea r to fra m e and steerin g
gea r to fle x ib le coupling fa sten ers are im portant
attaching p arts in that they could a ffect the p e r ­
form an ce of vita l components and system s, and/
o r could resu lt in m a jor re p a ir expense.
must be rep laced with one of the sam e part num­
b e r o r with an equivalent p art if replacem ent be­
com es n ecessary. Do not use a replacem ent part
of le s s e r quality o r substitute design.
values must be used as sp ecified during r e ­
assem bly to assure p rop er retention of this part.
2. Check steerin g gea r fo r p rop er lubricant le v e l.
When hoses a re discon­
bolts and rem ove pump
shaft. Do not ham m er pulley
damage pump. Use T o o l
stamped pulleys o r T o ol
cast pulleys.
u n d e r "M aintenance a n d
They
Torque
a means o f checking the re p a irs made to the
pump and the condition o f the steerin g gear,
which may also be faulty.
F ig . 3 0 — Side M o u n te d Power S teering C y lin d e r
F ill p ow er steerin g system with fluid and bleed out
3 .
a ir using the procedu re outlined under "M aintenance
and Adju stm en ts."
POWER CYLINDER
Removal
1. Disconnect the two hydraulic lin es connected to the
pow er cylin der and drain fluid into a container.
not reuse.
4 0 - 5 0 - 6 0 Series (Except 9 , 0 0 0 lb. a n d
Front Axles)
a. Loosen dust co vers from ball joints at each end
of cylin der.
b. On each end of p ow er cylin der rem ove the cotter
pin locking the adjusting screw in position and
back out adjusting screw fa r enough to pull cylin ­
der o ff b all stud.
6 0 9 ,0 0 0
Series w i t h lb. or 1
a. A t fra m e attachment, loosen dust co v er, rem ove
cotter pin locking the adjusting sc re w in position
and back out adjusting screw su fficien tly to pull
cylin der off b a ll stud.
b. R em ove cotter pin, nut and ball stud at pitman
arm .
2. Rem ove pow er cylin der from veh icle.
Installation
1. In stall the pow er cylin der on the veh icle by re v e rs in g
rem ova l procedu res.
NOTE: When in stallin g pow er cylin d ers in c o r­
porating an adjusting sc re w at the b all stud at­
tachment, tighten screw , with ball stud in place
until it bottom s, then back off to nearest hole and
secu re with cotter pin.
2. Reconnect the two hydraulic lin es, f i l l the system
with fluid and bleed out a ir using the procedu re out­
lined under "M aintenance and Adjustm ents."
b a ll joint.
STEERING 9-19
1 1 ,0 0 0
lb.
1,0 00
lb. Front Axles (Fig. 3 0 )
G rease
CHEVROLET TRUCK SERVICE MANUAL
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