Precor M9.21si Pacific Scientific SR3628-5387-7-5 Treadmill Motor Rebuilding

Pacific ScientificPrecor

Precor,  Pacific Scientific

Model 9.21si 

Motor # SR3628-5387-7-5

Treadmill Motor Repair

H.P.: 2     Voltage: 90DC     3200 rpm

Motor Rebuild (Normal)

Armature testing, Machining, and balance

Magnets are checked for magnetism and chips or cracks are repaired.

Brush holders are tested for insulation leakage by 1,000 volt hi-pot and 500 volt megger tests.

Motor bearing journals are inspected and machined if needed

New Bearings     New Brushes

Motor reassembly and testing,  Cleaning and painting, Labor,  Warranty


MAJOR REBUILD:  Includes all procedures above, plus a full armature rewind, when needed.


Please send your motor to us when you can along with a copy of this webpage.

Normal Rebuild $175.00 Major Rebuild $365.00 2-2021

Connect With Us

Submit Your Quote Online Call 800-423-4789
Mon-Fri 8am-5pm PST

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Image may not be indicative of your specific model, for illustrative purposes only