1-S62
L4400 , WSM
ENGINE
(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”.)
W10360060
Correcting Cylinder (Ov0.25 mm)
1. When the cylinder is worn beyond the allowable limit, bore and
hone it to the specified dimension.
2. Replace the piston and piston rings with oversize (+0.25 mm)
ones.
NOTE
■
• When the oversize cylinder is worn beyond the allowable
limit, replace the cylinder block with a new one.
W10367470
Cylinder liner I.D.
Factory spec.
87.000 to 87.022 mm
3.42520 to 3.42606 in.
Maximum wear
Allowable limit
+0.15 mm
+0.0059 in.
(A) Top
(B) Middle
(C) Bottom (Skirt)
(a) Right-angled to Piston Pin
(b) Piston Pin Direction
Oversize cylinder I.D.
Factory spec.
87.250 to 87.272 mm
3.43504 to 3.43591 in.
Maximum wear
Allowable limit
+0.15 mm
+0.0059 in.
Finishing
Hone to 2.2 to 3.0
μ
m Rz.
(0.000087 to 0.000118 in.Rz.)
∇∇∇
(1) Cylinder I.D. (Before Correction)
(2) Oversize Cylinder I.D.
KiSC issued 07, 2007 A
Tractor Manuals Scotland - Please Do Not Copy
Tractor Manuals Scotland
