Question about Master Heaters B155DST
Before setting the gap make sure the motor does not have any motion in the shaft indicating a worn bearing. If so, the motor must be replaced.
The rotor is surrounded by a metal ring called the pump body, which has 2 screws that attaches it ti the motor. Loosen the screws. This will allow a slight up/down movement of the pump body. Install the rotor. Adjust the rotor so that on the top side of the rotor there is .003 to .005 clearance then tighten the screws.
Then set the pump pressure. Watch this video with instructions.
Posted on Oct 17, 2010
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Posted on Jan 02, 2017
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