Chevrolet 70 1969 Series, Руководство по ремонту

Страница: 903 / 913

STEERING 9-27
O-ring, spool valve, and spring by depressing valve
against spring pressure and allowing it lo spring back
to a point where it can be rem oved.
NOTE: Seat may be removed from outlet side
of pump discharge line using a No. 4 easy-out
(J-8659) as shown in figure 3.
CLEANING
Im m erse all parts in cleaning solution to remove all tra ­
ces of oil, dirt, or other foreign m atter. It is im po rtant
that all parts it m ain absolutely clean throughout reassem ­
bly.
INSPECTION
1. Inspect pum p housing for visible dam age. Check for
scratches in control valve and rotor bore.
2. Carefully inspect rotor for wear, scratches, or other
dam age. Edges of rotor m ust be sharp and free of
nicks.
3. Inspect shaft for dam age. Surface at oil seal and
bearings m ust be sm ooth and free of nicks or ridges.
4. Inspect flow cc rtro l spool valve for excessive wear
and scratches.
5. Inspect rotor slippers for excessive wear or other
dam age.
6. Inspect slipper springs and spool valve spring for
weak coils or other dam age.
7. Inspect needle bearing rollers in pum p housing and
front insert to be sure they are satisfactory for further
service.
F ig u re 1 — R e m o v in g P u lle y fro m P u m p S h a f t
REPAIR
1. The oil seal can be rem oved from front insert using
seal rem over (J-8842-1) as shown in figure 4
C A U T IO N :
Be sure
that shaft b e a rin g is not
d a m a g e d w h e n re m o v in g seal.
2. Clean oil seal contact surface in insert of any nicks
m ade during seal removal.
3. C o at outer surface of oil seal lightly with sealing
com pound, then using seal installer (J-8841) press or
drive seal squarely into front insert until flush (fig. 5).
NOTE: Lip of seal must be toward front insert
bearing.
ASSEMBLY
NOTE: During assembly operation it is essential
that absolute cleanliness be observed.
1. Install rotor on drive shaft, using key and two snap
rings.
2. Using a piece of soft copper wire approxim ately 25
inches long, m ake two turns around the center of the
rotor. Fasten the wire as shown in figure 6. W ire
m ust not be too tight and m ust be bent tow ard drive
end of shaft.
3. Install two springs and one slipper in each rotor slot.
Each slipper is positioned by sliding under wire as
springs are com pressed. The notched portion of the
CHEVROLET SERIES 70-80 HEAVY DUTY TRUCK SH O P M A N U A L