Kubota DF972-E2, Руководство по ремонту, Страница: 134 / 138

S-64
WG972-E2, DF972-E2, WSM GASOLINE / LPG ENGINE
Oil Clearance between Crankshaft Journal and Crankshaft
Bearing 2 and Crankshaft Bearing 3 (Continued)
(Reference)
• Undersize crankshaft bearing 2 and 3
• Undersize dimensions of crankshaft journal
W1047088
(5) Cylinder
Cylinder Wear
1. Measure the I.D. of the cylinder at the six positions (see figure)
with a cylinder gauge to find the maximum and minimum I.D.’s.
2. Get the difference (Maximum wear) between the maximum and
the minimum I.D.’s.
W1070089
Oversize Bearing Code Number Marking
0.2 mm
0.008 in.
Crankshaft bearing 2 02 15694-23930
020 US
Crankshaft bearing 2F 02 1G460-07530
Crankshaft bearing 3 02 1G460-07580
020 US
Crankshaft bearing 3F 02 1G460-07630
0.4 mm
0.016 in.
Crankshaft bearing 2 04 15694-23940
040 US
Crankshaft bearing 2F 04 1G460-07540
Crankshaft bearing 3 04 1G460-07590
040 US
Crankshaft bearing 3F 04 1G460-07640
Undersize
0.2 mm
0.008 in.
0.4 mm
0.016 in.
Dimension A
1.8 to 2.2 mm radius
0.071 to 0.087 in.radius
1.8 to 2.2 mm radius
0.071 to 0.087 in.radius
*Dimension B
1.0 to 1.5 mm relief
0.0394 to 0.0591 in. relief
1.0 to 1.5 mm relief
0.0394 to 0.0591 in. relief
Dimension C
43.734 to 43.750 mm dia.
1.72181 to
1.72244 in. dia.
43.534 to 43.550 mm dia.
1.71394 to
1.7147 in. dia.
(0.8S)
The crankshaft journal must be fine-finished to higher than ∇∇∇∇ .
*Holes to be de-burred and edges rounded with 1.0 to 1.5 mm
(0.0394 to 0.0591 in.) relief.
Cylinder I.D.
Factory spec.
74.500 to 74.519 mm
2.93307 to 2.93382 in.
Allowable limit
74.669 mm
2.93972 in.
(A) Top
(B) Middle
(C) Bottom (Skirt) (a) Right-Angled to Piston Pin
(b) Piston Pin Direction
KiSC issued 01, 2006 A