wsm Kubota L4100, Workshop Manual

Page: 128 / 346

ENGINE L4100, WSM
1-S56
(EU)
Replacing Crankshaft Sleeve
1. Remove the used crankshaft sleeve (3).
2. Set the sleeve guide (2) to the crankshaft (5).
3. Set the stopper (1) to the crankshaft as shown in figure.
4. Heat a new sleeve to a temperature between 150 and 200 °C
(302 and 392 °F), and fix the sleeve to the crankshaft (5) as
shown in figure.
5. Press fit the sleeve using the auxiliary socket for pushing (4).
(Refer to "SPECIAL TOOLS" .)
NOTE
• Mount the sleeve with its largely chamfered surface facing
outward.
9Y1210278ENS0090US0
(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.
3. If the wear exceeds the allowable limit, bore and hone to the
oversize dimension. (Refer to "Correcting Cylinder" .)
4. Visually check the cylinder wall for scratches. If deep scratches
are found, the cylinder should be bored. (Refer to "Correcting
Cylinder" .)
9Y1210278ENS0091US0
(1) Stopper
(2) Sleeve Guide
(3) Crankshaft Sleeve (4) Auxiliary Socket for Pushing
(5) Crankshaft
Cylinder I.D.
Factory specification
87.000 to 87.022 mm
3.4252 to 3.4260 in.
Allowable limit
87.170 mm
3.4319 in.
(A) Top
(B) Middle
(C) Bottom (Skirt) (a) Right-angled to Piston Pin
(b) Piston Pin Direction
KiSC issued 08, 2012 A