Charge Check Valve Disassembly - Toro Sand Pro 2020 Service Manual

Acceleration Valve Removal (Fig. 43)
1. Remove plugs and O–rings from both sides of the
end cap.
2. Slide acceleration valve and spring out of one side
of the end cap. Slide other valve out the other side.
Acceleration Valve Inspection (Fig. 43)
1. Inspect valves for cracks, bending, and plugged
holes. Clean out plugged holes; be careful not to dam-
age the valve. Replace valve as necessary.
2. Inspect valve bores in the end cap for damage and
foreign material. Remove any foreign material.
Acceleration Valve Assembly (Fig. 43)
1. Insert valve into valve bore. Insert spring and other
valve into other bore.
2. Install O–rings and plugs into both sides of the end
cap. Tighten plugs.
Relief Valve Disassembly (Fig. 44)
Note: On the Sand Pro 2020 and 3020 the control
shaft is on the implement relief valve side of the hydros-
tat. On the Sand Pro 5020, the control shaft is on the
charge relief valve side.
1. Remove plug and O–ring from variable housing.
IMPORTANT: Do not alter shims or interchange
parts between relief valves.
2. Slide shim kit, spring, and poppet out of the housing.
Relief Valve Inspection (Fig. 44)
1. Inspect poppet and spring for nicks, cracks, and dis-
tortion. Replace parts as necessary.
2. Inspect valve seat in the housing for damage and
foreign material. Remove any foreign material.
Relief Valve Assembly (Fig. 44)
1. Insert poppet, spring, and shim kit into housing.
2. Install O–rings and plugs into housing. Tighten
plugs.
Charge Check Valve Disassembly (Fig. 44)
1. Remove plug and O–ring from variable housing end
cap.
2. Slide spring and ball out of the end cap.
Sand Pro 2020/3020/5020
Charge Check Valve Inspection (Fig. 44)
1. Inspect ball and spring for nicks, cracks, and distor-
tion. Replace parts as necessary.
2. Inspect valve seat in the end cap for damage and
foreign material. Remove any foreign material.
Charge Check Valve Assembly (Fig. 44)
1. Insert ball and spring into the end cap.
2. Install O–rings and plugs into end cap. Tighten
plugs.
2
3
1
1. Plug
2. O–ring
9
11
8
10
2
1
7
6
1. Plug
2. O–ring
3. Shim kit (implement)
4. Spring (implement)
5. Poppet
6. Shim kit (charge)
Page 4 – 51
4
3
Figure 43
3. Acceleration valve
4. Spring
1
3
4
5
5
Figure 44
7. Spring (charge)
8. Plug
9. O–ring
10. Spring (charge check)
11. Ball (charge check)
Hydraulic System (Rev. A)
1
2
2