MASSEY FERGUSON MF230 Shop Manual Download Page 60

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SERVICE MANUAL

transmission from differential housing,

using paragraph  145  as a guide.  It is not
necessary to  separate transmission from
engine.  Unwire  and  remove  the  set
screws  retaining  selector  and  shifter

forks to rails. Remove detent spring and

plunger assemblies (1-Fig. 146) and

stop plate (5), then withdraw shifter rails
and forks from transmission case. Forks

(4)

are interchangeable, but rails (2 and

are

not. Rails should be installed with

milled flat to top rear and selector lock
grooves  to  center.  Interlock  pin  (6)
prevents the  movement of the other rail
when  either  selector rail  is moved from

the neutral position.

When assembling, slide center shift

rail into case and through the selector
and shift fork. Tighten selector set screw

and install safety wire. Rotate rail until

shift fork set screw can be tightened ful
ly, then install safety wire. Install the

left shift rail and fork, then right shift

rail and fork into respective bores,

tighten set screws and install safety

wire.

Slide the planetary shift rail

through rear of case and locate fork over

end with set screw to the outside. Slide

rail  forward into case and into selector.
Tighten  set  screws  and  install  safety
wire.  Be  sure  that  interlocking  pin  is

through the center rail and that all rails

are in "NEUTRAL." Install steel balls
in lock mechanism and locate at rear of
case. The steel balls should be at both

ends of the center rail interlock pin and

the  widest  flat  of  lockplate  should  be
over  planetary rail.  Tighten  screws  at
taching the  interlock  mechanism  to  4 7
N

m (35 ft.-lbs.) torque. Locate the

planetary shift fork into groove of
planetary coupler, then slide coupler into
planetary while piloting shift fork over

the rail. Tighten set screws and safety

wire in place.

PLANETARY UNIT

All Models So Equipped

151.

'lb

remove the planetary unit, first

detach transmission from differential

Fig.  147-E'Xploded  view  of
planetary  assembly  used  on
Multi-Power models. Notched
section (N) of rear cover Is In
stalled  over  bottom  right-

hand mounting bolt hole.

1 . Frnnt shim

Front plate

3. Ring gear

4. Dowel

6. Thrust washer
7 Planet carrier

Pinion

shan

9. Thrust washer

10.

Pinion

11.

Spacer washer

12.

Needle

rollert

13. Rear plate

14. Sbin coupler

housing using paragraph 145 as a

general  guide.  Remove  the  planetary
shift  fork  and  coupling  (14-Fig.  147)
from  rear  of transmission  case.  Remove
the four retaining screws and withdraw
rear  cover  (13),  reru·  thrust  washer  (6)

and planet carrier (7). Work planetru·y
ring gear (3) and dowels (4) from case us
ing screwdrivers. Remove planetary front
cover (2) and shim

(1).

Paragraph

1 5

Planet pinion shafts

(8)

are a tight

press fit in planet carrier {7). Use a

suitable press for removing and install

ing pinion shafts.

Assemble and inslall unit as follows:

Apply a light coat of grease lo one side
of thrust washers

(9),

bearing needles

(12) and spacer washers (11). Position
one thrust washer

(9)

on bench with

greased  side  up  and  locate  pinion  (10)
over the washer.  Install  one spacer  (11)
in pinion, followed by  one row of needles
(12),  a  spacer

(Ill,

the second row of

needles and the third spacer (11) and

thrust washer

(9).

Assemble the two re

maining pinions in the same way. Posi·

tion the carrier (7) in a press with the
hub side down, install the pinion with

bearings and washers, then press pinion

shaft into carrier until flush.

Position front, plate (2) on

ing gear (3)

with oil grooves toward inside. Install

shim  (1) with  slots  on  shim  and  front
plate  aligned  and  toward  top  when
assembled to rear of case. Tap into posi
tion  on rear  case  to  be  sure  dowels

are

fully into case. Use a light coat of grease

Fig. 148-EKploded view of transmission upper shafts and associated parts, reverse Idler ge11r assembly

and Multi-Power clutch unit.

I .

Reteiner dip

Idler aha!\

3 Thrust washers

4. Needle rollers

Spacer

6. Washer

Reverse idlt!r gear