Assembly (Two Spool Victor); Lift Cylinder Service; General Information; Cylinder Description - Kohler K91 Owner's Manual

FIG. 19. Load
Check Valves
Assembly
(TWO SPOOL VICTOR)
1.
Coat two load check poppets and
"0"
Rings with
lithium base grease (Fig. 19). Install plugs,
"0"
Rings, check poppets and springs into top center
bores of valve.
2.
Position valve body so that relief valve bore i s
vertical (Fig. 18). Drop ball into bore so that ball
rests on relief seat. Apply grease to ball retainer
and spring and assemble. Enough grease should
be used so spring and ball retainer stick together.
Insert spring and ball retainer assembly into bore
against ball.
Slide
metal gasket on adjustment
screw and install screw into valve bore number of
turns recorded during disassembly. Hold adjust-
ment screw and tighten jam nut to 45-52 ft. Ibs.
torque. Insert metal gasket over adjustment screw
and screw cap onto adjustment screw.
3.
Coat detent spool with oil and slide spool into
valve bore from relief valve side (Fig. 17). Push
spool into bore only far enough to expose handle
side "0" Ring groove in valve body. Coat "0" Ring
with lithium grease and install in groove of valve
body. Check that
"0"
Ring i s properly seated in
groove. Push spool over
"0"
Ring only far enough
so that other end of spool exposes
"0"
Ring groove
in valve body.
Coat
"0"
Ring with lithium grease and install in
groove of valve body. Check that "0" Ring is
properly seated in groove. Push spool over
"0"
Ring until end of spool i s flush with end of valve.
Position handle into slot of spool and align bot-
tom hole of handle and hole in spool. Install
clevis pin into handle and spool and secure using
cotter pin. Install link into holes of handle and
valve body and secure using cotter pin.
Apply grease to inside and outside of spacer and
install on spring. Slide two washers onto end of
spool. Install detent screw into spacer and spring
assembly. Install detent screw, spacer and spring
on end of spool. Torque to
2-3 ft. Ibs.
Locate notch
in flat surface of end cover.
Slide
end cap over
spring with notch positioned down and secure to
valve using two screws. Apply lithium grease into
holes
of
end cap and on two detent springs. In-
stall steel balls, springs and plugs into holes in
end cap.
4. Coat remaining spool with oil and slide spool into
valve bore from relief valve side (Fig. 16). Push
spool into bore only far enough to expose handle
side
"0"
Ring groove in valve body. Coat
"0"
Ring with lithium grease and install in groove of
valve body. Check that "0" Ring
i s
properly seated
in groove. Push spool over
"O"
Ring only far
enough
so
that other end of spool exposes "0"
Ring groove in valve body.
Coat "0" Ring with lithium grease and install in
groove of valve body. Check that
"0"
Ring is
properly seated in groove. Push spool over
"0"
Ring until end of spool is flush with end of valve.
Position handle into slot of spool and align bottom
hole of handle and hole in spool. Install clevis pin
into handle and spool and secure using cotter pin.
Install link into holes of handle and valve body
and secure using cotter pin.
Apply grease to inside and outside of spacer and
install on spring. Slide washer onto end of spool.
Install detent screw into spacer and spring assem-
bly. Install detent screw, spacer and spring on end
of spool. Torque
to 2-3
ft.
Ibs.
Locate notch in
flat surface of end cap. Position end cap on valve
with notch down and secure to valve using two
screws.
LIFT CYLINDER SERVICE
GENERAL
INFORMATION
This manual covers the overhaul of the hydraulic
(lift
cylinders listed below. The
8365
cylinder used on
GT-14, 18HP Automatic and D-Series Automatic trac-
tors is not repairable, nor are the cylinders used on
D-250
tractors.
105254
-
1976-77
C-Series Automatic tractors, and 1975 and
prior tractors where original equipment 6618
cylinder has been replaced by 105254.
106249
& 108872
-
1978 &
later
C
&
GT-Series Automatic tractors.
piston works in a machined steel cylinder, and the
direction of travel i s controlled b y , the hydraulic lift
valve. The cylinder i s welded closed at one end and
has a sealed piston rod guide bushing at the opposite
end.
Three t y p e s of piston and rod construction are used.
The
first has the piston welded to the piston rod and
uses a threaded clevis at the exposed end. The second
type has a piston secured with a nut and the clevis
is welded to the exposed end. The welded clevis type
of cylinder was first used during the 1981 model year.
The third type has a piston threaded onto the piston
rod and the clevis is welded to the exposed end.
This
cylinder was first used during the
1983
model year.
CYLINDER DESCRIPTION
The
lift
cylinder consists
of
a bidirectional steel
piston
'secured to a chrome plated piston rod. The