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Information

The Aermotor Co. has continuously manufactured windmills since 1888.

In 1886, Thomas Perry considered 5000 different design elements before settling on the basic Aermotor. This design has been so successful, that it has remained virtually unchanged since then.

Self-oiling Aermotor Windmills have been in production since 1915, in four different models:

• The 502 Model which was manufactured only in 1915.
• The 602 Model was manufactured from 1916 to 1933.
• The 702 Model was manufactured from 1933 to 1981, and represents by far the majority of Aermotors still in service today.
• The 802 Model was introduced in 1981. Model 802 parts are interchangeable with Model 702 parts and the 802 differs from the 702 only in two material ways:
  • The "Garlock" bearing material used in the 802 is a carbon/molybdenum compound which gives twice the service life that white metal bearings do.
  • All castings are made from "Ductile Iron" which is less brittle, and thus superior to the older types of cast iron. The 802 is basically a 702, made from better materials with the same high standard of workmanship.
• The Aermotor has been named "The most popular water pumping windmill of the 20th century" and "The Rolls Royce of windmills" because of it's outstanding design and quality of workmanship.
• A key feature of Aermotor design is that wear is minimised and reduced to only certain parts. A simple overhaul every 10-20 years (depending on work-load) allows an Aermotor to run almost indefinitely.
• There are many Aermotors still in daily service some 95 years after manufacture.
• Aermotor History in South Africa: Lloyds were agents for the Aermotor Co. until 1946, after which P. Andrag & Sons of Cape Town took over the agency. In 1964 Andrag began manufacturing two Aermotor models under liscence, ceasing production in 1973.
• If you are an Aermotor owner in South Africa and your mill has "Lloyds" on it's tail, it has been in service for at least 66 years - just as it was designed to do.

Pumping Capacities of Aermotor Windmills

Size of Cylinder Inches	*Capacity per Hour, Gallons		Elevation in Feet to Which Water Can Be Raised
			Size of Aermotor Windmill
	6 Ft.	8-16 Ft.	6 Ft.	8 Ft.	10 Ft.	12 Ft.	14 Ft.	16 Ft.
1 7/8	125	180	120	175	260	390	560	920
2	130	190	95	140	215	320	460	750
2 1/4	180	260	77	112	170	250	360	590
2 1/2	225	325	65	94	140	210	300	490
2 3/4	265	385	56	80	120	180	260	425
3	320	470	47	68	100	155	220	360
3 1/2	440	640	35	50	76	115	160	265
3 3/4		370			65	98	143	230
4	570	830	27	37	58	86	125	200
5	900	1300	17	25	37	55	80	130
6		1875		17	25	38	55	85

Aermotor Maintenance Schedule

An Aermotor that is correctly installed is virtually maintenance free!

1. Check the windmill once every six months to be sure the windmill is running correctly. This is just a visual check from the ground or from the car.

2. Under normal conditions the mill requires a change of oil once a year. You should use SAE 10 or less. The oil should be of the non-detergent type.

3. Check to see if nuts and bolts have remained tight on mill and tower. Do this at the same time you change oil, or after a major storm.

Aermotor Windmill Oil Capacities.

Do not use more than the quantities below. (US Gallons:Litres)

1. 6' Aermotor 1-Qt (0.946 litres)
2. 8' and 10' 2-Qts (1.892 litres)
3. 12' Aermotor 1-Gal (3.785 litres)
4. 14' and 16' 2-Gal (7.570 litres)

Note: The right amount of oil will ensure proper lubrication and a longer, more efficient life for your Aermotor Windmill. Use only SAE 10 or less of the non-detergent type. Other types may seriously damage your Aermotor.