Connecting Rod - Takeuchi TB 175 Handbuch

4. Disassembly, inspection and reassembly of engines

(5) Connecting rod

Appearance inspection
(a)
Inspect the portion near the boundary of the chamfered
portion and I-beam section of the big and small ends of
the connecting rod as well as the portion near the oil hole
of the bushing at the small end for cracks, deformation,
and discoloration.
(b)Twist and parallelism measurement Use a
connecting rod aligner and measure the twist and
bend.
Item Standard dimension
Twist and 0.03 or less
parallelism per 100 mm
(c)Rod small end measurement
Measure the pin outside diameter according to
4.4.5.(4) (a) described above.
Model Item
Piston pin
I.D. bushing
3TNV82A
Pin O.D.
Clearance
Piston pin
I.D. bushing
TNV84 to 88
Pin O.D.
Clearance
Piston pin
I.D. bushing
4TNV94L•98
Pin O.D.
Clearance
Piston pin
I.D. bushing
4TNV106 (T)
Pin O.D.
Clearance
If the bushing is to be replaced because the oil clearance
exceeds the limit, use spare part.
Model
3TNV82A
TNV84 to 88
4TNV94L•98 (T)
4TNV106 (T)
mm
Limit dimension
0.08
mm
Standard Limit
23.025 to 23.038 23.068
22.995 to 23.000 22.967
0.025 to 0.043 0.101
26.025 to 26.038 26.068
25.995 to 26.000 25.967
0.025 to 0.043 0.101
30.025 to 30.038 30.068
29.987 to 30.000 29.959
0.025 to 0.051 0.109
37.025 to 37.038 37.068
36.989 to 37.000 36.961
0.025 to 0.049 0.107
Service part code
119810-23910
129100-23910
129900-23910
123900-23910
104
Twist
Twist and parallelism measurement
Connecting rod
aligner
Twist measurement using
a connecting rod aligner
Cylinder gage
Connecting rod small end
Parallelism
Mandrel