MOTOR BRUSHES FOR FOREDOM MICROMOTORS

Replace both brushes with new ones even if only one of them looks worn.

Pay careful attention to the orientation of the brush curve in relation to the curve of the motor armature. This same orientation must be maintained when replacing brushes. Follow the specific instructions in your Owner’s Manual when replacing motor brushes.

Motor Brush Pairs:
HP2-326 – for H.MH-120 in K.1020 Micromotor Kit
HP8-163 – for H.MH-130 or H.MH-13018 in K.1030 or H-103018 Portable Micromotor Kits
HP4-163 – for H.MH-170 or H.MH-17018 in K.1070 or H-107018 Micromotor Kits
HPL4-504 – for HPMH-011 Hammer Handpiece, and discontinued H.MH-145A and H.MH-135 Rotary Handpieces
HPL4-304 –  for use in discontinued H.MH-145 Micromotor Handpiece.

Checking and Changing Carbon Brushes for the H.MH-170 or H.MH-17018
A spare set of carbon brushes is usually supplied with a new handpiece. Depending on how long the handpiece is used each day, the brushes should be checked for wear about every 200 hours of use and replaced when the brush is less than 2mm (5/64″) long.
1. With handpiece power cord disconnected from control box, unscrew protective cap from rear of motor (see Figure 5) by turning in counterclock­wise direction while gripping the handpiece body. (It has a standard right hand thread.)
2. With small crosspoint screwdriver remove screws and brush as­sem­blies one at a time. Check length of carbon brush from spring to curved side of brush.
Brushes should be removed and replaced (if less than 2mm in length) one at a time. Replace both brushes with new ones even if only one of them looks worn.
Pay careful attention to the orientation of the brush curve in relation to the curve of the motor armature. This same orientation must be maintained when replacing brushes.