MASSEY FERGUSON MF230 Shop Manual page 46

SERVICE MANUAL
ion lightly towards armature to remove
any free play in linkage, measure
clearance between end of pinion (13) and
the thrust collar (14). 1\.irn eccentric pin
(16) as required to obtain recommended
clearance of 0.13-0.38 mm (0.005-0.015
inch). Tighten locknut to hold pin in
position.
109. PERKINS STARTING MO­
TOR. A Perkins (Hitachi) starting motor
is used on some MF240 and MF250 trac­
tors. Connect voltmeter and ammeter to
starting motor as shown in Fig. 109
perform no-load test. Specifications are
as follows:
No-Load Test-
Volts . . . . . . . . . . . . . . . . .
.
Amperes (max.) . . . . . . . . . . . . . 120
Rpm . . . . . . . . . . . . . . . . 4000-7500
.
Refer to Fig. 112 for· an exploded view
of typical Perkins starting motor. Ar·­
mature commutator minimum allowable
diameter is 40 mm (1.575 inches). Max­
imum allowable runout
is
and commutator 0.10 mm (0.004 inch).
Depth of insulation below surface of com­
mutator should be 0.20-0.80 mm
(0.008-0.031 inch). Minimum allowable
brush length is 14 mm (0.551 inch).
Armatw-e end play should be 0.05-0.30
mm (0.002-0.012 inch). If end play ex­
ceeds 0.30 mm (0.012 inch), install an ad­
ditional thrust washer (15).
Starter drive pinion end clearance is
'
adjustable. Connect a 6 volt battery to
solenoid "S" terminal to hold pinion in
engaged position. Push pinion lightly
towards armature to remove free play in
linkage, then measure clearance be-·
tween face of pinion gear and the pinion
stop (19). Recommended clearance is
0.3-1.5 mm (0.012-0.060 inch). Add or
remove spacer washers (2) as required to
obtain desired clearance.
ENGINE CLUTCH
Tractors may be equipped with a
flywheel mounted dual stage clutch
which permits continuous Oive) pto or
with a split torque clutch with indepen­
dent pto. Refer to the appropriate f ollow­
ing paragraphs for adjustment and
overhaul procedure.
ADJUSTMENT
Models MF230-MF240-MF250
110. Clutch pedal free travel CF-Fig.
113) is measured between top of clutch
pedal shaft (4) and bottom of footrest
spacer (3). Free travel should be 1 1 mm
If
(7/16 inch).
incorrect, loosen clamp bolt
(2), then insert a punch into hole of
release shaft (1) and rotate shaft until
clutch release bearing contacts clutch
levers (resistance
til desired free travel is obtained, then
tighten clamp bolt.
Models MF235-MF245
111. Clutch pedal free travel is
measured at (F-Fig. 114) between clut,ch
shaft arm
Free travel should be 4 mm (5/32 inch).
If incorrect, loosen clamp bolt (1) and
to
rotate clutch release shaft until
throwout bearing just contacts clutch
fingers. Move pedal until correct free
travel is obtained, then tighten clamp
bolt.
The length (R) of pedal linkage rod
. . . 12
. .
should be measured from center to
center and adjusted to the following
lengths as necessary.
Early Style (Pedal Pushes
Downward)
Dual Stage Clutch-
Orchard Models
for armature
Fig. 113-Refer to text for
clutch pedal free travel ad·
}ustment on MF230, MF240
and MF250 models.
1. Croes wll
2 Clamp boll
a. Footresl
4. Clutch pedal
Fig. 114-Drewlng of late
style clutch pedal linkage
used on MF235 and MF245
models. Early style clutch
pede/ pushes downward.
C/earence "F" should be 4
mm (5/32 Inch). Refer to text
for rod length (R).
i s felt). Move pedal un­
(2) and transmission housing.
. . . . . . . 295.3
(11-5/8 in.)
apacer
Paragraphs
All Other Models
Split 'lbrque Clutch-
All Models . . .
Late Style (Pedal Pushes
Forward)
Dual Stage Clutch-
All
Models . . .
Split 'lbrque Clutch-
All Models . .
TRACTOR SPLIT
All Models
112. 'lb detach engine from transmis­
sion assembly, disconnect battery cables
and remove battery. Remove hood and in­
strument panel lower covers. Install
wedge blocks between axle and axle sup­
port to prevent tipping. Remove front
weights if so equipped. Disconnect wir­
ing from starter, alternator, temperature
mm
gage sending unit, fuel gage sending
PEDAL
LINKAGE
ROO
1 09 -1 1 2
. . mm
. . . . 308
.
(12-1/8 in.)
. . . . 298.5 mm
. . . .
(11-3/4 in.)
. . . . . . . . 295.3 mm
( 11-5/8 in.)
. . . . . . . . 285.8 mm
.
(11-1/4 in.)
47