Perkins 1106A-70T, Operation Manual, Page: 43 / 58

Illustration 42 g00326546
Measure the length of the connecting rod.
(1) Measuring pins
(2) Connecting rod
(CRL) Connecting Rod Length
1. Refer to Illustration 42 . Use the following tools in
order to measure the length of the connecting rod:
• Appropriate gauges for measuring distance
• Measuring pins (1)
2. Ensure that the measuring pins (1) are parallel.
“ CRL ” is measured when the bearing for the
crankshaft journal is removed and the original
piston pin bearing is installed.
Measure “ CRL ” . Compare the “ CRL ” that is
given in Table 7 . The grade of length of the
connecting rod is determined by the
“ CRL ” . Refer
to Table 7 for the correct grade of length.
Distortion of The Connecting Rod
1. Use the following tools in order to measure the
distances for the connecting rod (2) which are
specified in Illustration 42 :
• Appropriate gauges for measuring distance
• Measuring pins (1)
Illustration 43 g00326423
Measure the connecting rod for distortion.
(1) Measuring pins
(2) Connecting rod
(L) The length between the centers of the piston pin bearing and
the crankshaft journal bearing is shown in Illustration 43 .
2. Measure the connecting rod for distortion and
parallel alignment between the bores.
The bores for the crankshaft bearing and the
bearing for the piston pin must be square and
parallel with each other within the required limits. If
the piston pin bearing is removed, the limit
“ L ” is
the following value: ± 0.25 mm (± 0.010 inch)
The limits are measured at a distance of 127 mm
(5.0 inch) from each side of the connecting rod.
If the piston pin bearing is not removed, the limit
“ L ” is the following value: ± 0.06 mm
(± 0.0024 inch)
L is equal to 219.08 ± 0.03 mm
(8.625 ± 0.001 inch).
3. Inspect the piston pin bearing and the piston pin for
wear.
4. Measure the clearance of the piston pin in the
piston pin bearing. Refer to the Specifications,
“Connecting Rod” for dimensions.
i04046730
Connecting Rod Bearings -
Inspect
Check the connecting rod bearings and the
connecting rod bearing journal for wear or other
damage.
UENR0617 43
Basic Engine
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