Multi Pro 5700 - Toro
Multi Pro 5700 - Toro
Multi Pro 5700 - Toro
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CAUTION<br />
The centering springs are under tension. Remove<br />
the retaining ring carefully.<br />
10.Remove the spring retaining ring and centering<br />
springs from the spool.<br />
Reassembly<br />
Check all mating surfaces. Replace any parts with<br />
scratches or burrs that could cause leakage. Wash all<br />
metal parts in clean solvent. Blow them dry with pressurized<br />
air. Do not wipe parts dry with paper towels or cloth.<br />
Lint in a hydraulic system will cause damage.<br />
NOTE: Always use new seals and o–rings when<br />
reassembling the steering control valve.<br />
IMPORTANT: During reassembly, lubricate the new<br />
seals with petroleum jelly. Also, lubricate machined<br />
surfaces and bearings with clean hydraulic oil.<br />
1. Install the quad seal:<br />
A. Put one of the bearing races and sleeve into the<br />
housing.<br />
B. Together, the housing and bearing race create a<br />
groove into which the quad seal will be installed.<br />
C. Hold the bearing race tightly against the input end<br />
of the housing by pushing on the gerotor end of the<br />
sleeve.<br />
D. Fit the quad seal into its seat through the input<br />
end of the housing. Be sure the seal is not twisted.<br />
E. Remove the sleeve and bearing race.<br />
2. Lubricate and install the dust seal.<br />
3. Install the centering springs in the spool. It is best to<br />
install the two flat pieces first. Next, install the curved<br />
pieces, three at a time.<br />
8. Put the thrust bearing and bearing races into the<br />
housing. The thrust bearing goes between the two bearing<br />
races (Fig. 49).<br />
IMPORTANT: Do not damage the dust or quad seals<br />
when installing the spool and sleeve assembly.<br />
9. Apply a light coating of clean hydraulic oil to the spool<br />
and sleeve assembly. Carefully slide the assembly into<br />
the housing.<br />
10.Clamp the housing in a vise. Use only enough clamping<br />
force to hold the housing securely.<br />
11. Lubricate and install a new o-ring (Item 3) in the<br />
groove in the housing.<br />
12.Install the wear plate and align screw holes in the<br />
wear plate with threaded holes in the housing.<br />
NOTE: The holes in the wear plate are symmetrical.<br />
13.Install the geroter drive, making sure the slot in the<br />
drive engages the pin.<br />
14.Lubricate and install new o-ring in wear plate groove.<br />
15.Install the gerotor and align the screw holes.<br />
16.Lubricate and install new o-ring in gerotor ring<br />
groove.<br />
17.Lubricate and install new o-ring and seal ring in gero<br />
tor star groove.<br />
18.Install the spacer.<br />
19.Install the end cap and seven (7) cap screws. Tighten<br />
the cap screws, in a crossing pattern, from 140 to 160<br />
in-lb (15.8 to 18.1 N–m).<br />
20.Remove the steering control unit from the vise.<br />
21.Install the check ball and plug with o–ring. Tighten<br />
the plug to 150 in-lb (17 N–m).<br />
Hydraulic<br />
System<br />
4. Fit the retaining ring over the centering springs.<br />
5. Apply a light coating of clean hydraulic oil to the spool<br />
and slide it into the sleeve. Be sure the centering springs<br />
fit into the notches in the sleeve.<br />
Dust Seal<br />
Thrust Bearing<br />
and Race (2)<br />
6. Install the pin.<br />
7. Apply a light coating of petroleum jelly to the inner<br />
edge of the dust and quad seals.<br />
Quad Seal<br />
Figure 49<br />
<strong>Multi</strong> <strong>Pro</strong> <strong>5700</strong>–D Page 4 – 51 Hydraulic System