| Wind systems for pumping water: A training manual |
TOTAL TIME: 1 to 2 Hours
OBJECTIVES: To understand the maintenance needs of various types of wind systems and pumps
To learn maintenance techniques
To experience maintenance on a wind system
MATERIALS: Blackboard & wind waterpump system on site
Step 1: 30 minutes
Have the group develop a list of the various parts of the wind system and pumps that will wear out, and, in a parallel column, list what will cause the wear to be maximal or minimal.
Step 2: 30 minutes
Have the group develop another list showing the maintenance necessary to prevent wear of the parts listed. Using a parallel column, make an estimate of the frequency of maintenance necessary for that part.
Emphasize that wind systems, with the exception of sealed, oil bath commercial units, are usually a high maintenance technology.
Step 3: 1 hour
Have small groups perform lubrication and simulated maintenance on a working or broken wind waterpump system (if possible).
RESOURCES: Copies of Attachment 21-A
The oil in the bowl of the windmill should be changed at least once a year with a good grade of low temperature oil. This should be done in the fall of the year, prior to the winter months, because all moisture, or water, must be removed from the bowl.
Water in the oil can accumulate as a result of changing temperatures on the humid air, which has a tendency to drive the water from the air, and because of the total enclosure, the water is then dispersed into the oil.
It has been known that, in some instances, where the mill was neglected, sufficient water had gathered in the bowl to freeze and cause breakage of the bowl. It is for this reason that we recommend that the lubricant be removed from the windmill bowl in the fall of the year, and the user should be sure that all the liquid content is removed.
When the mill is being serviced, the user may find that the oil bowl has become laden with a thick sludge, usually resulting form the use of a lower quality of oil. If the user finds the situation to be thus, then we would suggested that after he has removed the drain plug and drained out most of the material in the bowl, he use some gasoline or coal oil and rinse off all the operating parts so that the sludge that may hang on will be removed.
This sludge, if not removed regularly, can move through the bearing and into the return oil slot, and it is possible that the bearing would begin to wear.
If sludge is present in the bowl when the mill is serviced, something should be done in the way of rinsing all of it free and flushing it from the bowl before refilling with new oil.
THE PULL OUT CABLE SHOULD BE INSPECTED AT LEAST TWICE A YEAR AND, IF THE CABLE STRANDS ARE FOUND TO BE FRAYING, THE CABLE SHOULD BE REPLACED.