MASSEY FERGUSON MF230 Shop Manual page 31

6 7-7 2
Paragraphs
67. INJECTION PUMP DRIVE
GEAR. The injection pump drive gear
is retained to the pump adapter by three
cap screws. When installing the gear,
align dowel pin (2-Fig. 69)
in adapter bub, then install the retain­
ing cap screws. The illje<:tion pump drive
gear and adapter are supported by the
injection pump rotor bearings.
68. IDLER GEAR The idler gear is
retained on idler shaft by a cap screw
and washer. Idler gear bore diameter
should be 53.98-54.02 mm
inches) and idler shaft diameter should
be 53.92-53.94 mm (2.123-2.124
Gear to shaft diarnetral clearance should
be 0.04-0.10 mm (0.0016-0.0039
Gear end play on shaft should be
0.13-0.38 mm (0.005-0.015
When reinstalling gear, make certain
all timing marks are aligned as shown
in Fig. 67. Tighten retaining cap screw
to
68 N m (50 ft.-lbs.) torque.
·
69. TIMING THE GEARS.
the odd number of teeth on idler gear,
the timing marks will align only once
in
18 crankshaft. revolutions.
engine after the gears are removed, first
install camshaft gear as outlined in
paragraph 66 and the inJeCtion pump
gear as in paragraph
67.
crankshaft gear on keyed shaft with tim­
ing mark to the front. Refer to Fig.
and turn crankshaft, camshaft and in­
jection pump until the respective timing
marks point approximately toward idler
gear hub; then, install idler gear align­
ing timing marks as shown.
TIMING GEAR HOUSING
Mo e
All Diesel d ls
64,
Th remove timing gear housing,
70.
lift
first remove timing gear cover
lined in paragraph then remove tim­
if
ing gears as outlined in paragraph
Remove oil pan, fuel
jection pump. Remove power steering
pump not previously removed. Remove
Fig. 69-Correct lnttallatlon of InJection pump
drive gear /s simplified by the dowel pin which fit•
In machined notch In pump drive shaft.
32
rocker arms and shaft assembly. Raise
and secure cam followers in the fully
raised position, then w ithdraw camshaft..
Unbolt and remove timing gear housing.
with slot
(1) Reinstall by reversing the removal pro­
cedure.
All Diesel
71. 1b
remove timing gear cover as outlined in
(2.125-2.127
paragraph
arm cover and rocker arms and shaft.
inches).
assembly. Raise and secure cam
followers in their uppermost position.
inch).
Remove fuel lift pump, then withdraw
camshaft
inch).
The camshaft runs in three journal
bores machined directly in engine block.
The front and rear camshaft
are gravity lubricated by return oil from
the rocker arms. The center journal
pressure lubricated by an external oil
Due to
line. The center journal, in turn, meters
oil to the rocker shaft and cylinder head
through a second short oil feed line.
1b time the
Inspect camshaft lobes and bearing
nal
journals for excessive wear, scoring, pit­
ting or other damage and renew 1f
necessary. Recommended bearing jour­
Install the diametral clearance in cylinder block
bores
is
67 It is recommended that cam followers
also be renewed
Camshaft end play is controlled by the
leaf-type spring riveted to rear face of
timing gear cover. Camshaft specifica­
tions are
Journal
Front . . . . . . . . . . . . 47.47-47.50 mm
Center
out­ Rear
as
. .
Cylinder Block
65.
pump and in­ Bore Diameter-
Front
Fig. 70- The camshaft can be withdrawn aa
shown. The gear may remain /nata/led.
CAMSHAFT
Models
64.
remove the camshaft, first
Remove fuel tank, rocker
shown in Fig. 70.
as
bearings
if
0.10-0.20 mm (0.004-0.008
camshaft i s renewed.
Diameter-
follows:
as
(1.869-1.870
. . . . . . . 47.22-47.24
. . . .
(1.859-1.860
.
. . . . . . . 46.71-46.74
. . .
(1 .839-1.840
. . . . . . . . . . . . 47.60-47.67
(1.874-1.877
MASSEY -FERGUSON
Center . . . . . .
.
Rear . . . . . . . .
.
reinstall camshaft, reverse the
1b
removal procedure.
removed, be sure stamped letters
on gear and camshaft flange are
Fig. 67)
aligned. T ighten gear retaining cap
screws to 27 N · m
ROD AND PISTON UNITS
Diesel Models
All
72. Connecting rod and piston units
are removed from above after removing
cylinder head, oil pan and rod bearing
caps. Be sure to remove carbon and ring
wear ridge (if present) from t.op of sleeves
pushing pistons out of cylinders.
before
Cylinder numbers are stamped on the
connecting rods and caps. When
reinstalling rod and piston units, make
i s
certain the numbers are in register and
face away from camshaft side of engine.
Refer to Fig. 71.
Connecting rod cap nuts and bolts
should be renewed whenever they are
removed. Note that two different types
of connecting rod nuts, with different
inch).
in.)
mm
in.)
mm
in.)
mm
in.)
rod
Fig. 71-Asstmble
A FRONT or F mark
B Cylinder numbc!r
.
. 47.35-47.42 mm
. .
(1.864-1.867 in.)
. . . 46.84-46.91 mm
.
If
in )
(1.844 - 1.847
camshaft gear was
(X­
(20 ft.-Ibs.) torque.
as
and piston units 1hown.
C. rod cor·
Connectlne
relation markl