Ford 4000 Series Shop Manual page 24

Paragraph 62
Fig. 47-Pressure plate retaining cap screw
heads must be positioned as shown to allow in-
stallation of cover.
Fig. 40-Exploded view of Hydramotor housing
and blocking valve components . Blocking valve
can be removed without disassembly of Hydra-
I Lockout
motor.
5. Spring
6. Spring & guide assy.
3 Plug - 12. Housing
4 Blocking valve
loose by tapping around edge with
mallet as shown in Fig. 50.
To reinstall the cover retaining snap
ring, housing must be held in cover
against pressure from spring. It is rec-
:Innl:ended that the unit be placed in
nn arbor press and the housing he
pushed into cover with a sleeve as
shown in Fig. 5]. CAUTION: Do not
push against end of shaft (14-Fig. 46).
Place snap ring over housing before
placing unit in press. Carefully apply
force on housing with sleeve until
flange on housing is below snap ring
groove in cover. Note that lug on
housing must enter slot in cover. If
housing binds in cover, do not apply
heavy pressure ; remove unit from press
and bump cover loose with mallet as
shown in Fig. 50. When housing has
been pushed far enough into cover, in-
stall snap ring in groove with end gap
near hole in the cover as shown in Fig.
49.
Fig. 49 - To remove cover retaining snap ring,
drive pin punch through hole in cover to disen-
gage snap ring from groove.
Fig. 50-In event coil pressure plate spring does
not push cover from housing , lap alternate
mounting lugs on cover with soft face mallet as
shown above.
62. OVERHAUL HYDRAMOTOR
STEERING UNIT. With the unit re-
moved from tractor as outlined in para-
graph 59 and the cover retaining snap
ring removed as outlined in paragraph
61, proceed as follows:
Clamp flat portion of hydramotor
housing in a vise and remove cover (30
-Fig. 46) by pulling upward with a
twisting motion. Remove the pressure
plate spring (27), then remove cap
screws (51) and lift off the pressure
plate (23) as shown in Fig. 52. Remove
the dowel pins (Fig. 53), then remove
snap ring (21) from shaft (14) with suit-
able snap ring pliers and screwdriver;
discard the snap ring. Pull pump ring
and rotor assembly (20) up off of shaft
as shown in Fig. 54. Tap outer end of
shaft with soft faced mallet as shown in
Fig. 55 until bearing support (15) can
be removed, then carefully remove the
actuator shaft assembly from housing
as shown in Fig. 57. Note: As the ac-
tuator shaft and control valve spool
assembly is a factory balanced unit and
is not serviceable except by renewing
FORD
Fig. 51-Using sleeve and arbor press to push
housing Into cover to allow installation of the
cover retaining snap ring (7).
Fig. 52-Lifting pressure plate (23) from dowel
pins (13).
the complete Hydramotor steering
unit, it is recommended that this unit
not be disassembled.
Carefully clean and inspect the re-
moved units. Refer to paragraph 60 for
information on the blocking valve as-
sembly. If the housing control valve
bore or blocking valve bore are deeply
scored or worn, or if the blocking valve
spool or the actuator shaft and control
valve spool assembly are damaged in
any way making the unit unfit for fur-
ther service, a complete new Hydra-
motor steering unit must be installed.
If these components (housing, blocking
valve and actuator assembly) are ser-
viceable, proceed with overhaul as fol-
lows:
Remove the check valve retainers
(26-Fig. 46), springs (25) and check
valve balls (24) from pressure plate
(23) and blow passages clear with com-
pressed air. Renew the pressure plate
assembly if check valve seats or face of
plate are deeply scored or damaged.
M
w
24