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
kPa
(5000 psi)
pressw·e gage
(1)
at test port (3) in lift
cover. Move the response control lever
(4)
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
inner quadrant.
If
system is nonpressure
type, check that center of rear bolt
holding transport stop (7 -Fig. 177) is
11
mm (7/16 inch) from rear of quadrant
stop. On all models, check to be sw-e
lever friction springs
are
compressed to
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)
and pump filter
cover (2).
Fig. 176- VIew of pressure
control, 3-polnt
lift
system
showing location of com·
ponents used In testing. Con
nect 35000 kPa (5000 psi)
pressure gage (1) to port (3).
I.
Pre1!811Te
gage
2. Hose
3 Test
port
4.
Response control lever
5. Oil level dipstick
6.
Inner quadrAnt
Levt'l"
7.
Transport SLop
8. Draft
control lever
188.
TRANSPORT STOP. 'lb
check
transport stop adjustment, proceed as
follows: Run engine at 1000 rpm and
Fig. 174-VIew of hydfllullc
lift cover with mounted
dash pot
(1)
and pressure con-
trol system.
l. Otuhpot
2.
conlrol valve
3.
Standpipe
4. Press�
control lever
6.
Conlrol quadrant
6 LiJ\
arms
7 M88ler
control apr>ng
SM)'.
8.
Roc:kwf\
ann
9.
Diaphr88m
assy.
Fig. 174A-VIew of hydraulic
lift cover without mounted
dashpot (pressure control
model shown).
I Vertical
lever
2
Orsl\ &
pos1t1on control
roda
3. Roc:ksbafl
arm
4
Muter
control
11pring May.
5 PreSBure conl.rol lever
Paragraphs
1
8
7
-1
88
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
move lever back against the transport
stop. Measure the distance that scribe
lines are separated.
[f
nonpressure control style, move in
ner quadrant lever (6- Fig. l77) fully
"UP" in quadrant past the transport
F/g. 177-V/ew of controls for models without
pressure control. Refer to text tor rests and ad
justments.
6
Inner
quadrant
lever
7 Tra
nspon atop
8. Draft control
lner
9
Friction
tprong
73