Toro 3020, 5020 Hydrostat Service, Hydrostat Is Illustrated From Below, Hydraulic System Rev. A

Hydrostat Service

1	2	3	4	5	6	7	8	9	10	11	HYDROSTAT IS ILLUSTRATED FROM BELOW
														43	57
											15			44
5554								12	13			52
											14	16
												17
												18				28
53
					51									26
												22		25
														24
		9										19		10		27
	10								50			20		23	30
11																29
										49
												21
											48					2
											47					31
						24					46	45			32
															33
												44				35
				27											34
												25
											26
												43	34	40
			56								28			39
											41	33
												32		38	37	36
											29
												42
												2

Figure 40

1.	Plug	20.	Ball bearing	39.	Gerotor assembly
2.	O–ring	21.	Retaining ring	40.	O–ring
3.	Spring	22.	Plug	41.	Charge relief shim kit
4.	Ball	23.	Pipe plug (2 used)	42.	Charge relief spring
5.	Plug	24.	Journal bearing	43.	Trunnion shaft (SP 2020/3020)
6.	O–ring	25.	Lip seal	44.	Needle bearing
7.	End cap	26.	Washer	45.	Variable housing
8.	Acceleration valve spring	27.	Control shaft (SP 2020/3020)	46.	Retaining ring
9.	Acceleration valve	28.	Retaining ring	47.	Shaft
10.	O–ring	29.	Plug	48.	Swashplate
11.	Plug	30.	Implement relief shim kit	49.	Spring pin
12.	O–ring	31.	Implement relief spring	50.	Thrust plate
13.	Locating pin	32.	Poppet	51.	Shaft bearing
14.	End cap gasket	33.	Plug	52.	Cylinder block assembly
15.	Valve plate	34.	O–ring	53.	Lip seal
16.	Cylinder block	35.	Charge pump housing	54.	Washer (4 used)
17.	Spider	36.	Lip seal	55.	Cap screw (4 used)
18.	Piston assembly	37.	Needle bearing	56.	Control shaft/bearing (SP 5020)
19.	Woodruff key	38.	Cap screw (4 used)	57.	Trunnion shaft/bearing (SP 5020)

Note: The hydrostat used on the Sand Pro 2020, 3020, and 5020 are very similar. Due to different pump attachment to the engine, the location of the control shaft is different. On the Sand Pro 2020 and 3020, the control shaft is on the implement relief valve (30 and 31) side of the hydrostat. On the Sand Pro 5020, the control shaft is on the charge relief valve (41 and 42) side.

Hydraulic System (Rev. A) Page 4 – 48 Rev. B Sand Pro 2020/3020/5020