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| 866 Challenger Series
www.natvac.com | 800.253.5500
Drive System
• The pump should be mounted on a level, horizontal surface, secured
with Grade 8 fasteners.
• The drive system should be sized to supply the required horsepower
to the pump plus a reserve to insure long life.
• Make certain that all shafts, pulleys or turning parts are properly
guarded�
• Check the ratio of the drive system prior to installation to verify that
the pump will be turning at the proper speed and direction.
• Immediate engagement at working rpm for any rotating equipment
will cause failure or premature wear. It is the responsibility of the
installer and user to ensure the vacuum pump or blower is not being
over torqued at start up.
• The pump should be set up to engage slowly to avoid initial torque
damage�
Direction of Rotation
• The direction of rotation and RPM are marked on the front of the
pump�
• The direction of rotation required by your drive system should be
determined prior to ordering the pump.
• If during assembly of your unit you find you need the opposite
rotation, call NVE for instructions.
Factory Settings
• The automatic lubrication pumps are set at the factory during pump
testing and should require no further adjustment during pump
installation. The pump should consume 12-14 oz of oil per hour if
operated at 900 RPM�
• It is the responsibility of the installer to ensure proper vacuum/
