ENGINE
B2301, B2601, WSM
1-S51
(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".)
9Y1211156ENS0087US0
Correcting Cylinder
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 ones.
Oversize: 0.5 mm (0.02 in.)
• When the oversize cylinder is worn beyond the allowable
limit, replace the cylinder block with a new one.
9Y1211156ENS0088US0
(6) Oil Pump
Rotor Lobe Clearance
1. Measure the clearance between lobes of the inner rotor and the
outer rotor with a feeler gauge.
2. If the clearance exceeds the factory specifications, replace the
oil pump rotor assembly.
9Y1211156ENS0089US0
Cylinder I.D.
Factory
specification
D1005
76.000 to 76.019 mm
2.9922 to 2.9929 in.
D1105
78.000 to 78.019 mm
3.0709 to 3.0716 in.
Allowable
limit
D1005
76.15 mm
2.998 in.
D1105
78.15 mm
3.077 in.
(A) Top
(B) Middle
(C) Bottom (Skirt)
(a) Right-angled to Piston Pin
(b) Piston Pin Direction
Oversized cylinder liner
I.D.
Factory
specification
D1005
76.500 to 76.519 mm
3.0119 to 3.0125 in.
D1105
78.500 to 78.519 mm
3.0906 to 3.0912 in.
Allowable
limit
D1005
76.65 mm
3.018 in.
D1105
78.65 mm
3.096 in.
Finishing
Finishing
Hone to 1.2 to 2.0 mm µR max.
(48 to 78 in. µR max.)
(1) Cylinder I.D. (Before Correction) (2) Cylinder I.D. (Oversize)
Rotor lobe clearance Factory specification
0.060 to 0.18 mm
0.0024 to 0.0071 in.
To Next Page
Loading...
Need help?
General
