Komatsu 4D98 Series Shop Manual page 145

9. StaHing Mo for
9.2.9 Service standards
Brush
Commutator
Standard
dimensions
Ball bearing
Spring force N (kgf)
31.4 (3.2)
Standard / Limit height 18f6
Outside diameter Standard 37
Limit 36
Deflection Limit
0.2
Correction accuracy 0.05
Depth of insulation mica Limit 0.2
Correction accuracy 0.5 to 0.8
Armature shaft diameter Front 25
Rear 12
Bearing on gear case side
Gear shaft diameter 13.95 to 13.968
Hole diameter 14.00 to 14.018
Sliding portion of pinion Shaft diameter 13.95 to 13.968
Hole diameter
14.03 to 14.05
Armature
Front
6905DDU
Rear 6001 DDU
Length .! (pinion projection length)
0.3 to 1.5
I
9-29