Introduction

INTRODUCTION

The instructions given in the following paragraphs refer to the complete overhaul of the engine on the bench, after removing the power unit from the engine. The instructions are subdivided as follows:

• Dis-assembly of the engine: removal of the engine accessories and components and dis-assembly into its main component parts.
• Dis-assembly and checks of the crankcase: complete overhauling of the crank mechanisms.
• Cautions for re-assembly: these include specific re-assembly operations where they differ substantially from the instructions for dis-assembly.
• Checks and inspections of electrical components of the lubrication circuit.

For re-assembly, the sequence for all the dis-assembly instructions described hereafter, should be reversed unless otherwise specified.

The following procedures refer to complete overhauling of the whole engine; it is however possible to use individual parts of these instructions when dealing with specific components.

ENGINE DIS-ASSEMBLY

Preliminary operations

1. Set the engine on a special overhauling stand using supports N° 1.820.609.000 (R.4.0145).

1. 1

Removing the rpm sensor

1. Slacken the fastening screw and remove the sensor.

8 ÷ 10 Nm
0.8 ÷ 1.0 kgm

Removing the clutch plate

1. Slacken the fastening screws and remove the pressure plate.
2. Remove the clutch plate.

19 ÷ 23 Nm
1.9 ÷ 2.4 kgm

Removing the fuel distributor manifold

1. Slacken the fastening screws and remove the fuel distributor manifold complete with injectors, pulse