Mitsubishi FB13PNT, Quick Start Manual, Page: 246 / 292

3-21 3-21
1. 1.
φ φ
D D
502735 502735
IItte em m S Stta an nd da arrd d L Liim miitt
Wear if commutator ( Wear if commutator (
φ φ
D) D)
3 W 3 W
1.7 to 1.6 ton model 1.7 to 1.6 ton model
30 mm 30 mm
(1.18 in.) (1.18 in.)
29 mm 29 mm
(1.14 in.) (1.14 in.)
1.8 to 2.0 ton model 1.8 to 2.0 ton model
40 mm 40 mm
(1.57 in.) (1.57 in.)
39 mm 39 mm
(1.54 in.) (1.54 in.)
4W 4W
40 mm 40 mm
(1.57 in.) (1.57 in.)
39 mm 39 mm
(1.54 in.) (1.54 in.)
CHAPTER 3 MOTOR CHAPTER 3 MOTOR
502736 502736
IItte em m S Stta an nd da arrd d
Under cut of Under cut of commutator commutator
0.8 to 0.85 mm 0.8 to 0.85 mm
(0.032 to 0.034 in.) (0.032 to 0.034 in.)
How to repair of commutator How to repair of commutator
(1) (1) Grin Grind or d or polish polish the the Comm Commutat utator. or.
(2) (2) Unde Undercut rcut the co the commu mmutator tator after after grin grinding ding..
(3) (3) Finis Finish the sur h the surface of C face of Comm ommutato utator with a sa r with a sand pape nd paper (#400) r (#400)..
Inspection of insulation Inspection of insulation
Check the insulation between Commutator and Armature shaft. Check the insulation between Commutator and Armature shaft.
CAUTION CAUTION
Clean up the armature by compressed air before checking. Clean up the armature by compressed air before checking.
1 1
2 2