Lift Valve Service
Disassembly (Fig. 26)
1.
After removing lift valve from vehicle, wash valve in
solvent and dry thoroughly.
2.
Carefully mount lift valve in a vise so that mounting
pads are against jaws of vise. Lift valve spool retaining
ring (Item 14) should be facing up.
8
9
3.
valve body. Inside valve body, behind each hex cap plug,
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
5.
Use a hooked scribe or thin screwdriver to remove o–
rings (Item 9) from inside bore of valve body (be careful
not to scratch valve bore finish). These o–rings are the
seals for the spool.
10
13
14
Figure 26
6.
Inspect all components for wear, paying special
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.
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
13. Spool retaining ring
14. Retaining ring
Spool
O–ring
Spring (2 used)
Check ball (2 used)
Check ball seat (2 used)
Cam pin (2 used)
Valve body
Assembly (Fig. 26)
1.
Clean all components thoroughly before assembly.
Use new o–rings when reassembling.
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 – 32
Workman 3000/4000 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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