MASSEY FERGUSON MF230 Shop Manual page 72

SERVICE MANUAL
a. End play in master control spring.
b. Control linkage binding or
damaged.
7. Lift links creep down. Could be
caused by:
a. Internal leakage in cylinder, con­
trol valve or valve chambers.
SYSTEM CHECKS
All Models
187. Before beginning system checks,
be sw-e oil level is at full mark on
dipstick (5-Fig. 176), and test system
only after oil has reached operating
temperature of approximately 50°C
(120°F). Connect a 35000
pressw·e gage (1) at test port (3) in lift
cover. Move the response control lever
to "FAST" and the inner quadrant lever
(6)
to "TRANSPORT . " 1f system is
pressure control type, make sure that
transport stop (7) is fully rearward
directly beneath "PRESSURE" range of
If
inner quadrant. system is nonpressure
type, check that center of rear bolt
holding transport stop (7 -Fig. 177) is
mm (7/16 inch) from rear of quadrant
stop. On all models, check to be sw-e
lever friction springs
are
20.6 mm (13/16 inch). This amount of
compression should permit levers to slide
freely, but should hold position when
released.
1
2
3
Fig. 175-VIew showing loca­
l/on of transmission housing
and differential housing drain
plugs (1)
cover (2).
kPa
(5000 psi)
Fig. 176- VIew of pressure
control, 3-polnt
showing location of com·
(4)
ponents used In testing. Con­
nect 35000 kPa (5000 psi)
pressure gage (1) to port (3).
6.
I . Pre1!811Te gage
2. Hose
3 Test port
4. Response control lever
5. Oil level dipstick
Inner quadrAnt
7. Transport SL op
8. Draft
11
compressed to
188. TRANSPORT STOP. 'lb check
transport stop adjustment, proceed as
f ollows: Run engine at 1000 rpm and
and pump filter
lift
system
Levt'l"
control lever
l. Otuhpot
Fig. 174-VIew of hydfll u llc
lift cover with mounted
dash pot (1) and pressure con-
trol system.
2.
Roc:kwf\
3. Standpipe
4. Press� control lever
6. Conlrol quadrant
6 LiJ\ arms
control apr>ng SM)'.
7 M88ler
ann
8.
assy.
9. Diaphr88m
Fig. 174A-VIew of hydraulic
lift cover without mounted
dashpot (pressure control
model shown).
I Vertical lever
2 Orsl\ & pos1t1on control
arm
3. Roc:ksbafl
control 11p r ing May.
4 Muter
5 PreSBure conl.rol lever
Paragraphs
move draft control lever to full "UP"
position.
[f pressw-e control type, move inner
quadrant lever (6-Fig. 178) to "CONS­
TANT PUMPING" range forward of the
transport stop (7). Scribe a line (L) across
lift arm hub and Lift cover casting. Move
inner lever forward in "POSITION" con­
trol range to lower the lift links, then
[f
move lever back against the transport
stop. Measure the distance that scribe
lines are separated.
nonpressure control style, move in­
ner quadrant lever (6- Fig. l77) fully
"UP" in quadrant past the transport
roda
F/g. 177-V/ew of controls for models without
pressure control. Refer to text tor rests and ad­
justments.
Inner quadrant lever
6
7 Tra nspon atop
1 87 88
-1
8. Draft control lner
9 Friction tprong
73