MASSEY FERGUSON MF230 Shop Manual page 89

2 3 1 - 2 3 4
Paragraphs
then insert valve through bore in hous·
ing. Install seal (1) over valve stem
followed by retainer (2), spring (3), cap
(4) and "E" ring (5). Install cover plate
(39) and gasket (38) onto intake housing.
Position intake housing onto
making sure roll pin in valve sleeve
engages slot in intake housing. Tighten
the retaining cap screws to 20-27 N
{15-20 ft.-lbs.) torque.
231. ASSEMBLY. Assemble valve
chambers {19-Fig. 242) onto piston
yokes (14) making sure chamfered cor·
ners (C) of yokes face away from each
other. Install camshaft, cam f ollower
and cam blocks into piston yokes mak·
ing sure cam block with shoulder is at
front (widest lobe) of camshaft and that
shoulder faces inward. Slide camshaft
assembly into rear body making sure
end of cam follower (20-Fig. 237) is
towards bottom of pump.
Install control valve assembly (28) in­
to rear body, then position front body
over camshaft and studs. Tighten stud
nuts evenly to 41-47 N · m (30-35 ft..-lbs.)
torque. Make sure camshaft and pi s tons
move f reely. Install cap (24) and retain­
ing ring on end of oscillator housing.
Connect cam follower to oscillator.
AUXILIARY PUMP
All Models So Equipped
232. Two different auxiliary pumps
.
used
have been Pump shown in Fig. 243
is used on tractors equipped only with
MuJti-Power transmission and/or in­
dependent pto. Dual section pump
shown in Fig. 244 is used for auxiliary
hydraulic applications as well as for
Multi-Power or independent
pressure.
On all models, the auxiliary pump is
located directly above the main
hydraulic pump within the differential
housing. The auxiliary pump i s removed
with the main hydraulic pump
90
Refer to appropriate paragraph 223 or
225 for removal procedure.
233. SINGLE PUMP. To di
the removed pump, first remove snap
body rmg retaining drive gear to pump shaft.
rear
Remove cap screws securing pump to
gear train mounting plate, then remove
m pump. Remove cap screws attaching end
·
cover (1-Fig. 243) to body (8) and
separate pump components.
Inspect all parts for wear or damage.
All parts except pump body are
available for renewal. Pump gears (5
and 6) must be renewed as a matched
set.
To reassemble, reverse the disassem­
bly procedure. Be sure relieved edge of
pressure plate (3) is towards outlet side
of pump and smooth side is away from
gears. Tighten cover retaining cap
screws evenly to 27 N
torque.
Safety relief valve is set to open at
4480-5170 kPa (750-850 psi).
quires servicing, adjust pressure setting
as f ollows: Turn adjusting screw (12) in
1
pt.o
Fig. 243-Exploded view of single section auxiliary
pump used on some models.
End cover
2 Seal nng
3 Pre-sure plate
�
Snap nng
6 Onve gear
a unit.
a.s
6 Onven rear
sasse m ble
· m (20 ft..lbs.)
If
valve re­
10 II
7 Orwalhan
8 Pump
9 Rohef valve beJI
0
1 Cu1de pia"'
ll Spnng
12 plug
Acljuat•n�
242-Chemfered comers
Ieee away from uch other.
Fig.
(C) of piston yok .. (14) mu$1
MASSEY FERGUSON
-
until it bottoms, then turn screw out
1·112 turns. Attach a hand pump with
pressure gage to pump outlet port and
check valve opening pressure.
justing screw necessary, then stake
as
the screw when correct pressure is ob·
tained.
234. DUAL PUMP. It is recom·
mended that auxiliary hydraulic system
pressure be checked prior to servicing
the hydraulic pump. The pressure can
be checked at an auxiliary valve outlet
using suitable pressure gage and
tings. System pressure shouJd be be·
tween 15860-17925 kPa (2300.2600 psi).
HydrauJic lift. cover must be removed for
access to the adjustable high pressure
relief valve which is located
rear covet· plate (23-Fig. 244).
To disassemble the removed pump,
emo
frrs t r e snap ring retaining
v
gear to pump shaft.. Remove cap screws
attaching pump to gear train mounting
plate and remove pump from rear plate.
Scribe a line across pump bodies and end
cover to ensure correct alignment when
reassembling. Remove tie bolts at ·
taching pump bodies to end cover, then
.,... . 2 4
f>�
22
20
4(<ll(
Fig. 244-EIIploded view of dual $8Ct/on eull/1/try
pump thowlng component parte.
6 Fronl
l
AciJWit•lli plu11
rukcl
()ow
p,... .ura l
3 Spnna
• Po ppot
5
body
7 Buk·up
8 Seal
9 "'-"" plate
10 Sodtc t hHd
11 Onven gear
12 Onvo �•• r
Turn ad·
fit.
in pump
drive
13 ··o· nne
16. Oow•l
Spri"'l
16 Rear body
17 Onvon , .. ,
18.
20 Paton
21 Plate
22
23.
End oovor
kJ'eW
24 AciJu.una
!high preuurel