Multi Pro 5700 - Toro
Multi Pro 5700 - Toro
Multi Pro 5700 - Toro
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Relief Valve<br />
Removal<br />
1. Park machine on a level surface, stop engine, engage<br />
parking brake, and remove key from the ignition<br />
switch.<br />
CAUTION<br />
Rotate steering wheel and depress traction pedal<br />
in both forward and reverse to relieve hydraulic<br />
system pressure and to avoid injury from<br />
pressurized hydraulic oil.<br />
2. Operate all hydraulic controls to relieve hydraulic<br />
system pressure.<br />
3. Read the General Precautions for Removing and<br />
Installing Hydraulic System Components at the beginning<br />
of the Service and Repairs section of this chapter.<br />
4. Disconnect hose assembly from hydraulic fitting at<br />
bottom of relief valve body. Allow hose to drain into a<br />
suitable container.<br />
5. Unscrew relief valve body from hydraulic adapter in<br />
side of piston pump.<br />
6. If needed, remove hydraulic fitting from bottom of relief<br />
valve body.<br />
Installation<br />
1. Lubricate new o–rings with clean hydraulic fluid.<br />
A. Contamination may cause valves to stick or hang<br />
up. Contamination can become lodged in small valve<br />
orifices or seal areas causing malfunction.<br />
B. If sealing surfaces appear pitted or damaged, the<br />
hydraulic system may be over heating or there may<br />
be water in the hydraulic system.<br />
CAUTION<br />
Use eye protection such as goggles when using<br />
compressed air.<br />
4. Clean relief valve cartridge using clean mineral spirits<br />
to flush out any contamination. Submerge cartridge<br />
in clean mineral spirits to flush out contamination. Particles<br />
as fine as talcum powder can affect the operation<br />
of relief valve. Use compressed air for cleaning.<br />
Reassembly<br />
1. Lubricate new o–ring and back–up ring with clean<br />
hydraulic fluid. Install o–ring and back–up ring to the relief<br />
valve cartridge.<br />
2. Carefully thread relief valve cartridge into the relief<br />
valve body. The valve should go in easily without binding.<br />
Torque cartridge to 190 in–lb (21.4 N–m).<br />
3. Lubricate new O–rings with clean hydraulic fluid.<br />
Connect hydraulic fittings and O–rings to the relief valve<br />
body.<br />
Hydraulic<br />
System<br />
2. If removed, install hydraulic fitting into bottom of relief<br />
valve body.<br />
3<br />
5<br />
6<br />
3. Secure valve body to the hydraulic adapter in side of<br />
piston pump.<br />
4. Install hydraulic hose to hydraulic fitting at bottom of<br />
relief valve body. Tighten hose connections.<br />
Disassembly<br />
1<br />
2<br />
4<br />
7<br />
8 9<br />
190 in–lb<br />
(21.5 N–m)<br />
10<br />
1. Unscrew relief valve cartridge from the relief valve<br />
body. Remove o–ring and back–up ring.<br />
2. Inspect ports of the relief valve body for damaged<br />
sealing surfaces or threads and contamination.<br />
3. Inspect relief valve cartridge for damaged sealing<br />
surfaces and contamination.<br />
1. Pump assembly<br />
2. O–ring<br />
3. Hydraulic adapter<br />
4. O–ring<br />
5. Relief valve body<br />
Figure 41<br />
6. Relief cartridge<br />
7. Seal kit<br />
8. Hydraulic fitting<br />
9. O–ring<br />
10. Hydraulic hose<br />
<strong>Multi</strong> <strong>Pro</strong> <strong>5700</strong>–D<br />
Page 4 – 45<br />
Hydraulic System
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