MASSEY FERGUSON MF230 Shop Manual page 51

1 24 -1 27
Paragraphs
remove planetary unit as outlined in
paragraph 1 2 1 and remove input shafts
as outlined in paragraph 122.
Remove snap ring (22) from front
mainshaft, then bump shaft rearward
out of front bearing. Withdraw shaft
rearward while lifting gears
out top opening of
case.
Note that mainshaft. diameter at the
rear
slightly larger than at front. Rear
i s
bearing (28) must be removed and
reinstalled over forward end of shaft.
reinstall mainshaft and gears,
1b
reverse the removal procedure.
"open" side of front bearing f aces away
from firsUreverse gear (24).
REVERSE IDLER ASSEMBLY
All Models So Equipped
124. The reverse idler gear (3-Fig.
126) and shaft (7) can be removed after
removing the mainshaft as outlined in
paragraph 123.
Reverse idler shaft i s retained by a clip
(8) that fits into a notch in rear end of
shaft. Push shaft rearward from housing
and remove idler gear being careful not
loose
to lose the bearing rollers (6). A
total of 56 bearing rollers are contained
in bore of gear.
Use a light coating of grease to hold
bearing rollers and washers in place in
gear during reasse m bly. A d
slightly smaller in diameter than idler
used
shaft, can also be to hold rollers and
washers in correct position. Dummy
shaft must be short enough that it can
All models except MF230 may be
equipped with a sliding gear transmis·
sion coupled with a dual range planetary
reduction gear set providing eight for·
ward speeds and two reverse.
TRANSMISSION REMOVAL
All Models So Equipped
1b
speed
127. remove the complete eight­
transmi ss ion unit from the trac­
tor, first drain transmission and
hydraulic system fluid and separate the
both
engine from transmission housing as
outlined in paragraph 112. Remove both
step plates, disconnect clutch
rods,
brake then unbolt clutch pedal
bracket. Disconnect the neutral starting
switch and remove battery. Unbolt and
remove the battery support and air
cleaner. Attach hoist to transmission top
52
be pushed out of front support boss and
removed from housi n g as idler shaft is
pushed into the gear from the rear.
of
sure gear cluster is positioned in
transmission with smaller gear teeth
forward.
(24
and 26)
PTO LOWER SHAFT AND GEARS
All Models So Equipped
1b
125.
Be
(60-Fig. 126) and gears, first remove
sure
transmission assembly as outlined in
paragraph 119. Remove brake cross
shaft, clutch release bearing and fork,
and shift rails and forks. Remove front
cover plate (50). Remove snap ring (53)
from front of pto shaft, then thread two
cap screws into tapped holes in bearing
retainer
(56)
ing off the shaft.. Pull shaft r
of the countershaft.
input shafts (15 a.nd 21) and reta iner (1 1)
as a unit from housing. Lift pto gear (59)
from transmission case.
When reassembling, be sure bub side
of pto gear f aces f orward (away from
countershaft). Install input shafts and
retainer making certain cutout section
of retainer faces downward. Apply
shaft.,
nonbardening sealer to threads of re­
tainer cap
N m (40-45 ft.-lbs.) torque. Insert pto
·
y shaft through countershaft and pto gear.
umm
Install bearing retainer (56) with bear·
ing over shaft. Use a suitable spacer
tube, washer and bolt threaded into front
end of shaft to pull pto shaft into the
EIGHT-SPEED TRANSMISSION
cover, then unbolt and
of transmission case.
hydraulic line inside transmission com-
Fig. 127-Exp/oded view of
eight-speed transmission
shifter ralls, forks and
associated parts.
I Sluft 1nterlodt
2 Ball
3 Guke1
4 Nolcbecl plate
Selecl.or
6
6. Shift
rail
7 Detenl spnng � plunger
rod 8 Fork
9 Shin rai l 13rdl
and
10 Fork
II
Pork
12. Shift rail
13. Plug
14. Selector
15. Shil\ rail (planetary)
16. Fork
remove pto lower shaft
to retainer and
force bear·
ard out
earw
Unbolt and remove
screws,
then tighten to 54-61
lift
cover from top
Disconnect
ball <et.aJner
!2nd & 4th)
.
(IJl ,..,, I
&
MASSEY -FERGUSON
front bearing until washer (54) and snap
ring (53) can be installed at f ront of
Be
shaft. Install front
sealer to
nonhardening
ing cap screws and tighten to 54-61 N
(40-45 ft.lbs.) torque.
COUNTERSHAFT
All Models So Equipped
126. 1b remove countershaft (64-Fig.
126) and gears, transmission must first
be removed as outlined in paragraph
119. Remove shift rails and forks,
planetary unit, pto lower shaft and
input shafts and retainer, and mainshaft
as outlined in preceding paragraphs.
Remove snap ring (61) from front of
countershaft and slide front gear (62)
the shaft. Remove snap ring (70) from
rear of shaft, then
and hammer to drive countershaft for­
ward until free from rear bearing.
Withdraw countershaft forward from
housing and remove gears (67 and
Renew parts as necessary.
install front bearing (63) with "open"
side f acing away from gear teeth on
Install
countershaft.
flush with end of shaft. Install gears
with hub sides facing together. Insert
countershaft into housing from the front.
Block front of shaft, then tap rear bear­
ing onto shaft until snap ring (70) can
be installed. Install constant mesh gear
(62) and snap ring (61) onto front of
countershaft.
partment. Attach hoist to transmission
and support differential housing, then
unbolt transmission from differential
cover, apply
of
threads retain-
m
·
gear,
off
a block of wood
use
68).
Be
sure lo
(65)
needle bearing