SERVICE MANUAL
models, drain hydraulic system nuid
down until response control side cover
can be removed. Reaching through side
cover opening, spread pump control
valve lever arms (2-Fig. 191) and
remove roller. Remove transfer plate or
auxiliary valve. Remove lift cover
mounting cap screws, then carefully
remove cover using a suitable hoist.
When reinstalling lift cover, it is
recommended that two guide dowels be
installed to aid in aligning cover with
differential housing. Be sure to guide the
hydraulic standpipe into lift pump as
cover is lowered onto housing. Be sure
vertical control lever (1) is located to the
rear of control valve lever (2). Reinstall
roller in control valve lever. Tighten lift
cover cap screws to 75
N
·
m (55 ft.-lbs.)
torque. Complete installation by revers
ing the removal procedure.
208. OVERHAUL. To disassemble,
ftrst unscrew control spring adjusting
nut (4-Fig. 192) and withdraw control
spring assembly from lift cover. Remove
dashpot assembly
(53-Fig. 193).
If
equipped with pressure control, remove
diaphragm (52), pressw·e control valve
Fig. 194-Exploded view of
hydraulic lift controls.
I.
Druft control quadrant
2.
Oral\ control lever
3.
Position control lever
4. Poaition control quadrant
6. "0" ring
6. "0" nng
7.
Support
8. Set sere"
9.
Poeitlon control shnfl
10. Rollers
11. Drafl
control
ahafl
12.
"0" nng
(51) and pressure control lever (45).
Remove adjusting bolt (48). Remove
return spring (38). Remove set screw
(8-Fig. 194) securing control quadrant
in lift
cover.
Hold
draft and position
levers (37 and 40-Fig. 193) away from
quadrant cams (32 and 33), then remove
Fig. 193-Exploded view of hydraulic
lift
Internal control linkage used on models equipped with pressure
control. On models without pressure control, Items
45,
46. 51 and 52 are not used.
30.
Set sc:rew
31.
Pivot
shofl
32.
Position control
com
33.
Oral\ control
com
34.
Stop ocrcw
35
Oral\
control rod
36. Roller
37 Oral\ oontro1 lever
38 Return spnng
39
Position a<ljwning
screw
40
Posit1on control lever
41
Pivot yoke
42.
Spnngs
43. Vertical lever
44
A<\iUI!ting screws
45.
Pressure
control
lever
46.
Pre88ure control
a<\justing rod
4 7. Support bracket
48. Draft a<ljusting bolt
49
"0"
ring
50. Waaher
51. Pre88ure control valve
52.
Diaphragm a.uy.
53.
Dashpot
Paragraphs
208-209
quadrant assembly from lift cover. Com·
press sp1·ings (42), then install cotter
pins tht·ough holes in ends of spring rods
to hold springs in place. Remove bolts
securing support
bracket (47) to cyl
i
n
der,
then remove vertical lever (43) with con
trol levers and support bracket. Remove
set screw (30), then pull pivot shaft (31)
from cams and lift. cover. Remove con
trol cams (32 and 33) with rods and
springs.
To remove rockshaft (16-Fi.g. 192) and
lift cylinder (23), first remove left-hand
lift arm (18). Slide shaft with right-hand
arm out right side oflift cover. Remove
bushings (15) and
"0"
rings (14).
Remove rockshaft arm (19) with rod (20)
from lift cover. Remove stud nuts secur·
ing lift cylinder and remove cylinder
from lift housing. Remove piston from
cylinder.
Inspect all parts for wear, scoring or
other damage and renew
if
necessary.
Be
sure to renew all
"0"
rings.
To reassemble, install cylinder on lift
cover and tighten stud nuts nearest
front of cover to 197-257 N
·
m
(145-190
ft.lbs.) torque and nuts nearest rear of
cover to 278-332
N ·
m (205-245 ft..lbs.)
torque. Stagger piston ring end gaps
around piston, then use a suitable ring
compressor to assemble piston in
cylinder. Install rockshaft in lift cover
aligning master spline on shaft with
blind splines inside rockshaft arm and
lift arms.
Reinstall control linkage by reversing
the disassembly procedure. Adjust cam
pivot shaft (31-Fig. 193) to obtain
minimum amount of side play in
Linkage, but cams should move freely
without binding. Adjust lin
k
age as
outlined in paragraph 211.
209. DRAFT RESPONSE DASH
POT. The drafi response dashpot
assembly (53-Fig. 193) attaches to lever
79
