Robin America EY15-3 Manuel de référence

- 1 -

e-mail: [email protected] • www.robinamerica.com

RS 307 - REVISED

May, 2001

•PURPOSE:

• To improve engine reliability, better sealing of governor shaft

• To renew engine design and color

• Reduction of oil consumption, and asbestos-free gasket to comply with emission regulations.

• To reduce engine noise.

•DETAIL OF THE CHANGE:

Refer to pages 5 - 23

• CHANGE OF PART NUMBERS AND INTERCHANGEABILITY:

Refer to pages 20-23

•EXECUTION:

This change has been applied from June 2001 production.

The starting serial numbers are: EY15-3 ; #6000001

EY20-3 ; #6000001

MODEL SUBJECT

EY15-3, EY20-3

SERVICE BULLETIN

Model change of EY15 and EY20

- 2 -

•DETAIL OF THE CHANGE:

1.) ENGINE DIMENSION

1) EY15-3 STD specification

After the Change

Before the Change

- 3 -

2) EY15-3 Generator and Pump specification

•DETAIL OF THE CHANGE:

After the Change

Before the Change

- 4 -

•DETAIL OF THE CHANGE:

Before the Change

After the Change

3) EY20-3 STD specification

- 5 -

•DETAIL OF THE CHANGE:

2.)CRANKCASE

1) The oil seal will be added in the hole for governor shaft.

After the Change

Before the Change

- 6 -

•DETAIL OF THE CHANGE:

2) The material of intake valve seat will be changed (EY20-3)

3) The material of exhaust valve seat will be changed (EY15-3, EY20-3)

4) The ball bearing will be changed

5) The Valve guide will be changed

6) The boss to install the exciter coil will be eliminated.

After the Change

Before the Change

- 7 -

•DETAIL OF THE CHANGE:

3.) MAIN BEARING COVER

The ball bearing will be changed.

4.) GASKET CP (HEAD)

The material will be changed to asbestos-free material (graphite).

NOTE:

When repairing the engine, wipe off oil and clean the contact surface of

crankcase and cylinder head.

5.) GASKET (TAPPET COVER)

6.) GASKET (BREATHER PLATE)

The materials will be changed to asbestos-free materials.

7.) CRANKSHAFT

Material will be changed

8.) PISTON

The piston shape will be changed.

After the Change Before the Change

- 8 -

•DETAIL OF THE CHANGE:

9.) TOP RING

The shape of the top ring will be changed.

10.) OIL RING

The specification of the oil ring will be changed.

11.) CAMSHAFT

The material will be changed.

12.) INTAKE VALVE

The distinction mark on vlalve surfaces will be elinimated.

13.) EXHAUST VALVE

The distinction mark on valve surface will be eliminated.

After the Change Before the Change

- 9 -

•DETAIL OF THE CHANGE:

14.) MUFFLER

The muffler shape will be changed from cylinder type to the square type. The direc

tion of exhaust outlet will be changed from "45 degree" to "0 degree ( parallel with the

PTO).

After the Change Before the Change

- 10 -

•DETAIL OF THE CHANGE:

15.) MUFFLER COVER

The change of muffler cover shape will be accompanied with the muffler change.

NOTE:

After the change of the muffler and muffler cover, the optional parts (exhaust deflector and

spark arrestor) can be installed in the field.

After the Change Before the Change

Ce manuel convient aux modèles suivants

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