Basic Engine; Piston Ring Groove - Inspect; Connecting Rod - Inspect - Perkins 1106A-70T Operation Manual

UENR0617

Basic Engine

Piston Ring Groove - Inspect

Inspect the Piston and the Piston
Rings
1. Check the piston for wear and other damage.
2. Check that the piston rings are free to move in the
grooves and that the rings are not broken.
Inspect the Clearance of the Piston
Ring
1. Remove the piston rings and clean the grooves
and the piston rings.
Illustration 40
(1) Feeler gauge
(2) Piston ring
(3) Piston grooves
2. Fit new piston rings (2) in the piston grooves (3).
3. Check the clearance for the piston ring by placing a
suitable feeler gauge (1) between piston groove (3)
and the top of piston ring (2). Refer to
Specifications, "Piston and Rings" for the
dimensions.
Inspect the Piston Ring End Gap
This document has been printed from SPI2. NOT FOR RESALE.
i02415240
Illustration 41
(1) Piston ring
(2) Cylinder ring ridge
(3) Feeler gauge
1. Clean all carbon from the top of the cylinder bores.
2. Place each piston ring (1) in the cylinder bore just
below the cylinder ring ridge (2).
3. Use a suitable feeler gauge (3) to measure piston
ring end gap. Refer to Specifications, "Piston and
Rings" for the dimensions.
Note: The coil spring must be removed from the oil
control ring before the gap of the oil control ring is
measured.

Connecting Rod - Inspect

These procedures determine the following
characteristics of the connecting rod:
• The length of the connecting rod
• The distortion of the connecting rod
• The parallel alignment of the bores of the
connecting rod
Note: If the crankshaft or the cylinder block are
g00905732
replaced, the piston height for all cylinders must be
measured. The grade of length of the connecting rods
may need to be changed in order to obtain the correct
piston height.
If the grade of length must be changed, one of the
following actions must be taken:
• New connecting rod assemblies that are the
correct grade of length must be installed. Refer to
"Length of The Connecting Rod".
• New piston pin bearings must be bored after
installation in the original connecting rods. Refer to
"Piston Pin Bearings".
41
Basic Engine
g00782363
i04046797