Toro 2020, 5020, 3020 service manual Lift Valve, Disassembly, Inspection, Reassembly

Lift Valve

							12	15		14
							11			13
							7			10
										9
				8	1	2	3	5
			7	9
			6
	2	3 4	5
	1
				9
				10		4	6
				11
				12				9
				13
				14				8
				15
					Figure 27
1.	Plug		6.	Cam pin				11.	Spring
2.	O–ring		7.	Body				12.	Spring retainer
3.	Spring		8.	Spool				13.	Spacer float
4.	Ball		9.	O–ring				14.	Spool retaining ring
5.	Check valve seat		10.	Spring retainer				15.	Retaining ring

Disassembly

1.Wash valve in solvent and dry thoroughly.

2.Mount valve carefully in a vise so that the retaining ring is facing up and the mounting pads are against the jaws of the vise.

3.Remove plug and O–ring from the valve body. Re- move spring, ball, and cam pin.

4.Remove spool retaining ring from the spool. Push and twist spool carefully out of the body.

5.Remove spacer float from the spring retainer.

6.Remove retaining ring from the body. Remove spring retainer, spring, and spring retainer from the body.

7.Use hooked scribe to remove both O–rings from the body. Be careful not to scratch bore finish.

Inspection

1.Inspect spool for wear and flatness. Wear on one side of the spool may indicate a bent spool. Replace spool if necessary.

2.Inspect check valve seat for wear and damage of sealing surface. Replace if necessary.

3.Inspect ball for wear, damage, and flat spots. Re- place if necessary.

Reassembly

1.Clean and dry all parts thoroughly. Coat all O–rings with clean hydraulic fluid.

2.Use hooked scribe to install both O–rings into the grooves of the body bore.

3.Install spring retainer, spring, and spring retainer into the body. Secure with retaining ring.

4.Install spacer float into the spring retainer.

5.Coat spool with clean hydraulic oil. Push and twist spool carefully into the body. Secure spool with spool re- taining ring.

6.Install cam pin, ball, and spring into the body. Install O–ring and plug into the body. Tighten plug.

Hydraulic System (Rev. A) Page 4 – 38 Sand Pro 2020/3020/5020