Paragraphs
81 -84
taining cap screws and lower pan from
cylinder block.
'lb
reinstall, reverse the removal pro
cedure.
OIL PUMP
All
Diesel Models
81. The rotary type oil pump is
mounted on front main bearing cap and
driven from the crankshaft. timing gear
through an idler
as
shown in Fig. 78.
'lb
remove the oil pump, first remove
oil pan as outlined in paragraph 80.
Disconnect oil delivery pipe from
cylinder block and oil suction pipe from
main bearing cap. Unbolt and remove
the front main bearing cap with oil
pump attached. Pump can be unbolted
from main bearing cap after removing
idler gear.
Check rotor clearance with a feeler
gage as shown in Fig. 79. Clearance
should be 0.01-0.06 mm (0.0005-0.0025
inch). Outer rotor to body clearance (Fig.
80)
should
be 0.028-0.033 mm
(0.011-0.013 inch). Inner rotor end
clearance (Fig. 81) should be 0.04-0.08
rom (0.0015-0.0030 inch) and outer
rotor
end clearance should be 0.01-0.06
mm
(0.0005-0.0025 inch). If pump rotor or
body are worn, scored or damaged, pump
assembly must be renewed.
F/9. 79-C/earance between Inner and outer rotors
can be measured using a feeler gage es shown.
Remove oil pressure relief valve spring
and pi unger from pump body. Inspect
plunger and bore in pump body for weru·
or scoring and renew if necessary. Oil
pressure should be 345445
kPa
(50-65
psi) at high idle speed with engine at
normal operating temperature.
If oil pump drive gear was removed,
press gear onto shaft, with flat face
of
gear outward, until face of gear is flush
with end of shaft.
Reinstall pump by reversing the
removal procedure. Tighten main bear
ing cap screws to 150
N
·
m (110 ft.-lbs.)
torque.
COOLING SYSTEM
All
Diesel Models
82.
RADIATOR.
Th
remove radiator,
first
drain
the cooling system. Remove
hood and side panels.
Remove radiator
support strap.
Remove
fan shroud re·
taining screws and move shroud rear·
ward.
Disconnect top and bottom hoses
from radiator. Remove cap
screws
at·
taching radiator to
grille
housing and
remove the two retaining nuts from
underneath front
axle
support. Lift
radiator from the. tractor.
Th
reinstall, reverse tl1e removal
procedure.
83. THERMOSTAT. The thermostat
(17 -Fig. 82) is contained in a housing
under the coolant outlet elbow (18).
Thermostat should begin to open at
81 �84
oc
(177�183°F) and should be ful
ly open at 98
oc
(208 °F).
84. WATER PUMP.
'lb
remove water
pump, first drain cooling system. On
Models MF240 and MF250, remove
radiator
as
outlined in paragraph 82. On
all models, remove fan and fan belt.
Disconnect hoses from pump, remove
pump mounting cap screws and remove
pump assembly.
'lb
disassemble, remove back cover
plate (9-Fig. 82). Remove pulley hub (1)
Fig. 81-Use a straightedge and feeler gage to
Fig.
SO-Clearance between outer rotor and pump
measure end clearance between top of rotors and
36
body can be measured as shown.
machined surface of pump body.
MASSEY -FERGUSON
using a suitable puller. Press shaft and
bearing assembly (2) with impeller
(7)
rearwru·d from pump housing. Press
shaft out of the impeller. Remove seal
assembly (6) and slinger (3).
Inspect all parts for wear or daJnage
and renew
if
neceSSaJ·y.
Be
sure to renew
seal assembly.
'lb
reasse
mble, press shaft. and bearing
assembly into housing until front face of
bearing
is
flush
with
front of housing.
Be
sure shorter end of shaft is
towards
front
of housing. Install slinge1· (3) with flange
towards
bearing assembly. Install front
part
of
seal with carbon face of seal fac
ing rearward
as
shown in Fig. 83. Install
ceramic faced seal with grooved side
towards the impeller. Support front
end
of shaft, then press impeller onto shaft.
until clearance between front of impeller
blades and pump housing is 0.25-0.50
Fig. 82-Exp/oded view of water pump end ther·
mostat housing.
I
Pulley Onnge
2 Sltal\ & bearing
3.
Slinger
5. Houainl!
6.
Seal
usy.
7.
lmp��ller
8. Guket
9. Baclt cover plate
10. Gaak
e
L
II
Elbow
12 8)'11&11 h-
13.
OuLieL
h-
14.
Therm
..
Lal
houtlng
15.
GukeL
18. o
..
ket
17
Thonn
18.
Elbow
Fig. 83-lnste/1 front part of sea/ with carbon face
toward
rear.
The ceramic counterlece should be
Installed with grooved side toward rear.