Lift Valve Service
Disassembly (Fig. 35)
1.
After removing lift valve from vehicle, wash valve in
solvent and dry thoroughly.
2.
pads are against jaws of vise. Lift valve spool retaining
ring (item 14) should be facing up.
Carefully mount lift valve in a vise so that mounting
8
9
3.
valvebody.Insidevalvebody,behindeachhexcapplug,
there is a spring (item 3), ball (item 4) and cam pin (item
Remove two (2) hex cap plugs (item 1) from side of
6);
remove these parts.
7
6
NOTE: Remove check ball seats (item 5) only if they
need replacement; the seats are press fit into the valve
body.
5
3 4
2
1
4.
Remove retaining ring (item 14) from spool (item 8).
Remove spool retaining ring (item 13), spring retainer
(item 10), spacer (item 12), spring (item 11) and second
spool retaining ring (item 13). Carefully push and twist
spool to remove spool from valve body.
9
10
11
12
10
13
14
IMPORTANT: When removing O--rings from valve
body, be very careful to not scratch valve bore fin-
ish.
5.
O--rings (item 9) from inside bore of valve body. These
O--rings are the seals for the spool.
Use a hooked scribe or thin screwdriver to remove
Figure 35
1.
2.
3.
4.
5.
6.
7.
Hex cap plug (2 used)
O--ring (2 used)
8.
9.
10. Spring retainer
11. Spring
12. Spacer
Spool
O--ring
Spring (2 used)
6.
Inspect all components for wear, paying special
Check ball (2 used)
Check ball seat (2 used)
Cam pin (2 used)
Valve body
attention to the spool. Signs of wear on one side of the
spool may indicate a bent spool. Inspect the spool for
flatness and replace if necessary.
13. Spool retaining ring
14. Retaining ring
Assembly (Fig. 35)
1.
Use new O--rings when assembling lift valve.
Clean all components thoroughly before assembly.
2.
Coat all O--rings and spool with clean Dexron III ATF
before installation into valve body. Assemble compo-
nents in reverse order of disassembly. Install spool into
valve body before inserting cam pins, balls, springs and
hex cap plugs.
Hydraulic System
Page 9 -- 44
Workman HD Series
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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| Document Type | Service Manual |
| Language | English |
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