C12.9 Marine Propulsion Engine Caterpillar

Cylinder Liner Projection - Inspect

Usage:

Specifications

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Table 1
Specifications
Liner projection	0.045 to 0.075 mm (0.00177 to 0.00295 inch)

Introduction

Use this procedure to measure the cylinder line projection. Do not perform this procedure until you have read and understand this procedure.

Required Tools

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Table 2
Required Tools
Qty	Part Number
1	8T-0455 Liner Projection Tool Group
1	456-7965 Tool
1	457-9786 Cap
	487-3133 Spacer
	487-3134 Cap

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Illustration 1	g03700826
Typical example of the 456-7965 Tool (1) Plate (2) Screw

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Illustration 2	g03700829
Typical example of the 457-9786 Cap (3) Cap (4) Spacers

Inspection Procedure

Clean the cylinder liner flange and the cylinder block surface. Remove any nicks on the top of the cylinder block.
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Illustration 3 g03700385

(1) Screw
(2) Bolts
(3) Plate
(4) Spacers
(5) Cap
(6) Dial Indicator
(7) Gauge Body
Install cap (5) on the cylinder liner.
Attach plate (3) to the block using three cylinder head bolts (2) and three spacers (4).
Tighten screw (1) to 170 N·m (125 lb ft).
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Illustration 4 g03700815

Typical example of the 8T-0455 Liner Projection Tool Group
(6) Dial indicator
(7) Gauge body
(8) Bolt
(9) Gauge
Loosen bolt (8) until dial indicator (6) can be moved. Place gauge body (7) and dial indicator (6) on the long side of gauge (9).
Slide dial indicator (6) into the correct position. When the point of the dial indicator contacts gauge (9), the dial indicator is in the correct position. Slide the dial indicator until the needle of the gauge makes a quarter of a revolution clockwise. The needle should be in a vertical position. Tighten bolt (8) and zero the dial indicator.
Place gauge body (7) on the spacer plate for the cylinder block. The indicator point should be on the liner flange. Read the dial indicator to find the amount of liner projection. Check the projection at four locations (every 90 degrees) around each cylinder liner.
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Illustration 5 g03700800

Typical example of the cylinder liner
(10) Adjustment ring
(11) O-rings
If a liner does not meet the recommended cylinder liner projection specification, replace adjustment ring (10).
Adjustment rings are available in the following thicknesses:
- 0.08 mm (0.003 inch)
- 0.10 mm (0.004 inch)
- 0.12 mm (0.005 inch)
- 0.14 mm (0.006 inch)