MASSEY FERGUSON MF230 Shop Manual page 73

1 89 - 1 9 3
Paragraphs
stop Scribe a line across lift
(7).
and lift cover casting, then move inner
lever back to transport stop. Measure
distance that scribed lines
On all models, distance between
scribed lines should be
inch). If dimension is not cor­
(1/8-5/32
rect, adjust transport stop as outlined in
paragraph or before proceeding
197 204
draft
with further tests.
DRAFT CONTROL.
189
control, engine at low idle
run
speed.
arms.
Move inner quadrant lever
Fig. 179) against transport stop (7) and
operate draft control lever
the lift With draft control lever
fullly "UP", gage p
ressure
If lift links do not move to full
lransport or through
transport stop may be adjusted incon·ect­
ly, lift cover internal linkage may be
rnisadjusted or control valve may be
sticking If servo relief is opening, the
transport stop, lift cover linkage or
pressure control valve (if
may be incorrectly adjusted.
lift.
Position draft control lever between
the sector marks (M) on draft quadrant
while leaving inner quadrant lever at
"TRANSPORT." The links should re·
Fig. 178-Ret.r text lor
tren.,ott lltOp. P,... .u ,. control model -'town.
lRMr
checking end
to
L Scr1b<- hn.
q.
6 drant
L·•�r
Fig. 1 79-VIew showing sector marks (M) on draft
control quadrant. Refer to text tor checking and
adJusting draft control.
74
main at a midposition with draft lever
hub
arm
w ithin
tor mark.
or
separated.
are 198
mm
3.2·3.9 190.
check position control,
mounted implement to 3-point linkage.
Place draft control lever (8-Fig.
full "UP" position and response control
lever
(4)
Th
check at low speed and operate inner lever
raise
in "POSmON" control range to fully
raise and lower lift links several times.
(6-
It must be possible
lower lift links and to position them in
to
(8)
any intermediate setting.
should not be If lift links do not raise or lower fully,
be
perform the installed adjustments as
opening.
outlined in paragraph
links creep down then up again (hunt),
full range,
valve, valve chambers, pump pistons or
lift cylinder seal rings.
Move
"TRANSPORT." The lift links should
raise to transport positiOn without
reaching maximum system pressure.
equipped)
so
lift Jinks do not reach transport position
or if maximum system pressure is ob­
t.ained, refer to appropriate paragraph
or
195
MASTER CONTROL SPRING
191.
SENSITIVITY. To check sensitivity of
control spring, first attach a fully
mounted implement to lower links and
top link. Place inner quadrant lever
(6-Fig.
Operate engine at low rpm and move
draft. control lever
to approximately midpoint of lift travel
(implement must be clear of ground).
Apply a downward force to rear of im­
plement. System should respond by
lowering implement slightly. Apply an
edju.tlng
upward f orce to 1·ea1· of implement.
System should raise implement
Transport Lop
as upward force is being applied.
1
l•••r
8 Draft control
,..., of hydrauli c ll ff cowr. lm­
pltmtnt dreff toed I• tren•·
Fig. 130-The hitch m
control •prlng I• louted In
2 P,n
3
mltttd through the •prlng to A<IJustmg nut
5 Control oprtng
ectuete draff control llnbge.
I Cl�v,.
Cover
4
6 Spnng oeat
1 Plunger
8
O.erload
9 Set ..,..., w
10 Nylon
II L•fl
12 Control beam
Bushong•
13
14 Clev11 rocker link
inch) of either
6.3 mm (1/4
If
incon-ect, refer to paragraph
for adjustment procedure.
205
POSITION CONTROL.
attach a fully
first.
in "FAST" position. Run engine
t.o
fully raise and
or
195 101.
is
indicated in control
inner quadrant lever
for ad justment procedures.
202
in "TRANSPORT."
176)
to raise implement
(8)
as
..
ter
head
stop
plug
cover
MASSEY -FERGUSON
If system does not respond as de·
scribed, control spring should be ad·
sec
­
justed as outlined in paragraph
201.
'Ib
RESPONSE CONTROL. To
192.
check operation of response control, first
attach a fully mounted implement to
to 3-point links. Place inner quadrant lever
176)
(6-Fig. 176) i n "TRANSPORT.''
Operate engine at low rpm and move
draft control lever
(6)
tion. Move response control lever
"SLOW" position, then move draft con­
trol lever rapidly to full "DOWN"
position.
The implement should hesitate slight·
ly, then lower at. a moderate rate of
speed. Place response lever in "FAST"
position. Repeat lowering test using
If lift
draft control lever to raise implement,
then quickly move control lever to
"DOWN" position.
The implement should lower notice­
to ably qu1cker with response lever in
"FAST" position than previous check
w ith lever in "SLOW" position
If
response is not as described, adjust as
m
outlined appropriate paragraph
or
206.
PRESSURE CONTROL. To
193.
check operation of pressure control valve
(if equipped), attach an implement. or
so
weight to lift links. Run engine at
rpm, move draft control lever
to full "UP" position, move inner
176)
quadrant lever
(6)
stant pumping) in pressure control
range of quadrant and observe pressure
indicated on gage (1). Pressure should be
kPa
17230-17930
Move inner lever t.o full "LOW" posi­
tion and observe gage reading. Pressure
should be
0-500
ner lever to just raise implement and
place a load on hydraulic system.
Pressure indicated on gage should not
long
fluctuate more than
or
194
4
to full "UP" posi·
(8)
to
(4)
If
200
1000
(8-
Fig.
to full "HIGH" (con­
psi).
(2500-2600
psi). Move in ·
kPa
(0-75
psi)
kPa
700 (100