wsm wg972-e4 - Cylinder

ENGINE
WG972-E4, WSM
1-S56
(Continued)
(Reference)
• Undersize crankshaft bearing 2 and 3
• Undersize dimensions of crankshaft journal
9Y1211108ENS0096US0
(6) 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.
9Y1211108ENS0097US0
Undersize 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
0.02 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
0.02 in.
Dimension A
1.8 to 2.2 mm radius
0.071 to 0.086 in. radius
1.8 to 2.2 mm radius
0.071 to 0.086 in. radius
*Dimension B
1.0 to 1.5 mm relief
0.040 to 0.059 in. relief
1.0 to 1.5 mm relief
0.040 to 0.059 in. relief
Dimension C, D
43.734 to 43.750 mm dia.
1.7219 to 1.7224 in. dia.
43.534 to 43.550 mm dia.
1.7140 to 1.7145 in. dia.
The crankshaft journal must be fine-finished to higher than Rmax = 0.8S
*Holes to be de-burred and edges rounded with 1.0 to 1.5 mm
(0.040 to 0.059 in.) relief.
Cylinder I.D.
Factory specification
74.500 to 74.519 mm
2.9331 to 2.9338 in.
Allowable limit
74.669 mm
2.9397 in.
(A) Top
(B) Middle
(C) Bottom (Skirt)
(a) Right-Angled to Piston Pin
(b) Piston Pin Direction
KiSC issued 07, 2015 A