
SERVICE MANUAL
backlash is eliminated, then tighten the
four housing retaining screws. Rotate
the right pinion housing (4R) counter
clockwise until all backlash
is
removed
from the right pitman shaft, then
lighten the four retaining screws. Check
for correct assembly by locating the
center (straight ahead) position of the
steering shaft (20). With steering shaft
straight ahead, the blank splines on both
pitman shafts (10 and 15) should be
vertical. The small flat mounting boss
at rear of steering gear housing will
also
Fig.
9-/nsta//the
right
pinion wllh first
tooth (15)
be vertical when installed on tractor. Fill
aligned wllh first valley (10) on rhe other pinion.
steering
gear
housing
to
level ofplug(25)
with SAE 90 gear oil.
POWER ASSIST STEERING SYSTEM
This section covers the power steering
system available on Models MF230,
MF235 (except Orchard), MF240, MF245
Vineyard and MF250.
LUBRICATION AND BLEEDING
All Models So Equipped
6.
Recommended oil for power steering
system is Massey-Ferguson Permatran
ill Oil. Check power steering reservoir
oil level with engine running after all air
is bled from system. Power steering
system capacity is approximately 0.95
L
(1
U.S.
quart).
Air can be bled from power steering
system by running engine and cycling
from full left to full right., then
to full left several times. Repeat. un
til there are no air bubbles present in oil
reservoir. Make certain oil level is main
tained during bleeding process to avoid
starving the pump of oil.
SYSTEM OPERATING PRESSURE
AND RELIEF VALVE
All Models So Equipped
removing reservoir (27-Fig.
11)
and
turning screw (24). The relief valve on
models equipped with diesel engine is
also adjusted after removing reservoir
(27 -Fig. 10) and turning adjusting screw
(24). One full turn of relief valve screw
should change pressure approximately
2100 kPa (300 psi) on Models MF230,
MF235 and MF245. On Models MF240
and MF250, a pressure change of approx
imately 3100
kPa
(450 psi) should result
from one turn of adjusting screw.
Paragraphs
6-9
Reinstall reservotr, refill with otl and
recheck pressure after changmg relief
valve setting.
POWER STEERING PUMP
The pump shown in exploded
view
Fig.
10 is used on diesel models; the pump in
Fig. 11 on gasoline models. Refer to the
appropriate following paragraphs for
service.
All Models
8. REMOVE
AND
REINSTALL.
Clean the area thoroughly before discon·
necting any lines. Disconnect lines,
remove mounting screws and withdraw
pump.
When t•einstalling, tighten retaining
bolts
to
27 N
·
m (20 ft.-lbs.) torque. Refill
reservoir with fluid and bleed au from
system as outlined in paragraph
6.
Diesel Models
9. OVERHAUL. Mark the pump
housing (8-Fig. 10) and reservoir (27)
before removing reservoir. Filter
(16)
can
be removed after reservoir. Remove nut,
gear
(1), key and spacer (2). Establish the
setting of the r·elief valve plug (24) before
removing the plug. Remove the screws
attaching body (17) and shield (20)
to
the
housing (8). Remove gears (10 and 11),
Woodruff key
(6),
idler shaft (13) and pin
7. A pressure test of steering hydraulic
system will disclose whether the pump
relief valve or some other unit in the
system is malfunctioning.
'lb
check relief
pressure, install a "T" fitting at pump
pressure port, reattach pressure hose to
one port. of "T" and a 20000
kPa
(3000
psi) pressure gage
to
the other port.
Start
engine and operate at 2000 rpm. Thrn
steering wheel to full turn in either
direction and observe gage pressure
reading. Normal relief pressure is ap
proximately 8300 kPa (1200 psi).
Fig. 1o-.Explod«< vt.w
of power etHrlng pump
liNd on llots.� MF230, MF235
Mld MF245
«zUIJII»d
wfth
dlael
engine. Pump
uNd on
llots.l•
IIF240 Mld IIF25C �
.Jmller ur»pt
d!MI
eprl�
.,.
liNd
on
tfi'-f
\'11/W
end
eprlng guide pin (23) I• not UNd. It»« ehoM locrion of�,. ,
,.
(P)
end ffltum
The relief valve on models equipped
with gasoline engine is adjusted after
I Gear
2 Spo�r
3 Snap nng
4 Boanng
6 Shaf\
6 Woodruff keys
7
Sui
9
NM<IIe boanngo
10. Drtv• l;tftr
11. On-.n goar
12 Rm111
13 Idler 1haf\
14
Pan
,,. (R).
15. Guk•t
16. Filter
17 Body
18 Dowol pmo
19.
Ga�ket
20. Shaeld
21 R•hef plun��r
22
Spnng
23
Ptn
24 Rehef aa1Ju81mg
plug
25.
Nut
26 "0" rinil
27
Retervo1r
28
�·all plu�:
9