Kubota D650-B Handbuch Seite 226

f)
Checking Gap between Shaft and Bush
1) Measure the inside diameters of the bearing bushings on
the side of the drive and commutator,
2) Measure the drive-side and commutator-side shaft dia­
meters and calculate the gap,
Reference value
Allowable limit
Commutator side
0.03 to 0.10 mm
0.0012 to 0.0039 in.
0.20 mm
Drive side
0.05 to 0.10 mm
0.0020 to 0.0039 in.
0.0019 in.
• Diameters of shaft and bushing
8
Grounding Armature Coil
1) Check conduction across the commutator and core shaft.
If it is not conducting, the coil is good; if it is conducting,
the coil is defective.
2) If conducting, r'eplace armature coil.
If it is not conducting, the coil is good;
is faulty.
12.50mm
0.4921 in.
U302P162
o
Checking Commutator Wear
1) Check to see if the contact face of the brush is scored.
2) If scored, grind off with sand paper or on a lathe.
3) When the wear between the maximum and minimum
diameters exceeds 0.4 mm, correct the wear to within
0.05 mm on the lathe. Allowable limit is not less than
2 mm smaller than the reference value of outside diameter.
Commutator diameter
Reference value Allowable limit
e-_~~~~~~~-2:..:.8~.-0:,,-,m~m~~~~~~~~~--i-!,
. .. - . .. ----2-1.0 mm
1.1024 in. . 1.0630 in.
230