Takeuchi TB 175 Handbuch Seite 815

(4) Piston
Especially clean the combustion surface, circumference,
ring grooves and piston pin bosses, and check after
removing any carbon deposit. Any burr at a ring groove
or snap ring groove shall be removed. If crack is
suspected, inspect by color check.
(a)Piston outside diameter measurement
Measure the long diameter at H mm from the bottom end
of the piston of the oval hole in the vertical direction to
the piston pin hole.
Piston outside diameter
Outside diameter
Model
3TNV82A 81.950 to 81.980
3,4TNV84(T) 83.940 to 83.970
3,4TNV88 87.940 to 87.970
4TNV94L 93.935 to 93.965
4TNV98 (T) 97.930 to 97.960
4TNV106 (T) 105.930 to 105.960
If the piston outside diameter exceed the limit, replace the piston with new one.
If the clearance between piston and cylinder exceeds the limit, use an oversized piston. (Refer to the tables of
oversized pistons, oversized piston rings and cylinder boring dimension in (1) (c) above.)
Selective pairing of cylinder and piston
Piston must be paired with cylinder according to the below table. The size mark of a piston is shown on
the top surface of the piston and the size mark of a cylinder block is shown on the non-operating side of
the cylinder block. The service parts of pistons are provided.
Tolerance
+0.030 max.
+0.020 min.
Cylinder
inside +0.020
below
diameter +0.010 min.
D1
+0.010
below
0 min.
Model
3TNV82A
3,4TNV84 (T)
3,4TNV88
4TNV94L
4TNV98 (T)
4TNV106 (T)
Limit
Standard
81.905
83.895
87.895
93.900
97.895
105.880
+0.015 max.
+0.005 min.
Size mark
L
M
S
Cylinder inside diameter
4. Disassembly, inspection and reassembly of engines
Piston outside diameter
Clearance between
piston and cylinder
0.040 to 0.060
0.050 to 0.070
0.055 to 0.075
0.060 to 0.080
Piston outside diameter. D2
below +0.005
0 min.
L ML
D1
82
84
88
94
98
106
101
Measurement
position
H mm
mm
Measurement
position (H)
16
24
24
22
22
30
below 0 below -0.005
-0.005 min. -0.015 min.
MS
Piston outside diameter.
D2
81.965
83.955
87.955
93.950
97.945
105.945
S