ar0140b9202e

Measure cylinder bores

Type ar · topic 01.40 · version 0100 · 2016-02-12

Applies to: Cumbustion engine 612.983 with Vehicle 979.013, 979.016

Where it sits

Function group 1 Engine › 01 Complete engine, crankcase ventilation, cylinder head, crankcase › 01.40 Crankcase, timing case cover, end cover — Series 979 (models 013, 016)

EinPAS 15 Engine › 15.15 Combustion engine, complete/engine housing/crank assembly › 15.15.31 Crankcase/oil separator/ventilation — Series 979 (models 013, 016)

Also applies to engines/gearboxes: 612 983

AR01.40-B-9202E

Measure cylinder bores

12.02.16

Cumbustion engine 612.983 with Vehicle 979.013, 979.016

Measure cylinder bores

B01.40-0024-06

A, B Measuring direction in the cylinder

I Measuring point above the reversing point area of the first piston ring (wear-free area)

II Measuring point at the reversing point area of the first piston ring (highest wear area)

III Measuring point in the center of the cylinder running surface

Check

1

Clean inside the cylinder.

2

Check the cylinder running surfaces

The running surfaces must not present signs of excessive wear and/or deformations.

AH01.40-B-0001-01A

Measuring

3

With the micrometer, set the dial gage and the internal diameter measuring tool to cylinder diameter.

Install the dial gage with 5 mm pre-load.

*BE01.40-B-1001-02H

*001589532100

4

Measure the internal diameter of the cylinder in the no-wear area (I) and set the dial gage scale to “0”.

Measure at measuring point (I), above the reversing area of the first piston ring, in the directions (A) and (B).

*BE01.40-B-1001-02H

5

Measure the wear on the cylinder running surface, in the areas (II) and (III).

Measure at the measuring points (II) and (III), in the longitudinal (A) and transversal (B) directions.

*BE01.40-B-1003-02H

Max.out-of-round and taper.

*BE01.40-B-1002-02H

In cases of discrepancies

Replace the cylinder block.

Inspection data of crankcase

Número

Denominação

Engine 611.981/983; 612.983

BE01.40-B-1001-02H

Cylinder inner diameter

A

mm

88,000...88,006

X

mm

88,007...88,012

b

mm

88,013...88,018

BE01.40-B-1002-02H

Cylinder out of round and taper

Maximum admissible

mm

0,012

BE01.40-B-1003-02H

Maximum admissible wear on the cylinders sliding surface

At the first piston ring reversing point

mm

0,1

In the cylinder center

mm

0,05

Measure cylinder bores

001 589 53 21 00

Dial indicator

Referenced documents