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Skyrrid Farm, Pontrilas, Hereford. HR2 0BW. UK
www.leturbines.com
Page 8 of 47
Mechanical Assembly Procedure
1)
Unpacking - Inspect the contents of the box and ensure that all items are present and
undamaged. If any of the components are missing or damaged, please contact your dealer
immediately.
2)
Check Magnet Rotor & Continuity - Ensure that the main shaft is free turning and does not
scrape or rub as it rotates - see Fig 4. You may feel a slight resistance from the bearings at
this stage. The bearing units used in the magnet rotor assembly are factory lubricated and
sealed for life. It will take approximately 100 hours of normal operation for the seals to
‘bed-in’ and the lubrication to be distributed correctly around the bearing raceways and
ball cages. During this period you may notice a reduced performance caused by the
additional friction of the bearing seals. In operating temperatures of –10 degrees
Centigrade or lower, this ‘bedding-in’ period will be extended by a further 50 hours of
normal operation. Connect a digital multi-meter to the positive (red) and negative (black)
output leads extending from the yaw pivot. With the multi-meter set to detect DC Volts
(0-20V approx), a voltage should be displayed when the magnet rotor is spun. This voltage
will vary with the speed of rotation. If the magnet rotor rubs, or no voltage is detected
whilst turning the magnet rotor, please contact your dealer immediately.
Warning: The magnet rotor within your LE-450 turbine is constructed using neodymium iron
boron rare earth magnets. These are extremely powerful magnets and can cause injury if not
handled with respect. Take care when working with tools made of ferrous materials (such as
spanners and screwdrivers) close to the LE-450 alternator. The magnetic forces between ferrous
materials and the magnet rotor within the alternator maybe very strong. This may cause a
sudden snapping action that can pinch or trap your fingers or skin.
Fig-4: Checking magnet rotor rotation and coil-disc continuity
Summary of Contents for GA-LETU-016
Page 47: ......
