Perkins珀金斯850-854F柴油发动机T412827活塞总成

Cylinder block top face

To inspect

Operation 7-2

Inspect the cylinder block top face for cracks, damage and distortion in the same way as for the cylinder head,

refer to Operation 3-19.

If outside limit, renew the cylinder block.

Distortion mm (in)

Standard

Service limit

Less than 0,05 (0.002)

0,12 (0.005)

Note:   For emissions approved engines. If a new cylinder block is fitted, the engine should be tested on an

engine test brake and the fuel adjustment screw set. This procedures is only done by a Perkins approved

dealer. This will ensure that the engine will conform with emissions legislation.

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A

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100 Series

8

Engine timing

8

Fuel injection pump timing

To check timing

Operation 8-1

Special requirements

Special tools

Description

Torque Nm (lbf ft) kgf m

Part number

Fuel pump spill pipe

21825680

Delivery valve holder

42 (31) 4,2

1  Set the piston for number 1 cylinder to TDC on the compression stroke. Turn the crankshaft counter-

clockwise a quarter of a revolution.

2  Disconnect or remove the ESOS, HP pipes and LP fuel inlet pipes from pump (A).

3  Ensure the throttle lever is held in the maximum fuel position after the procedure.

4  Remove the delivery valve holder for number 1 cylinder and remove the delivery valve. Store the delivery

valve in appropriate clean fuel until assembly.

Note:  The fuel pump may need to be moved to an upright position to remove and to fit the delivery valves.

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100 Series

5  Connect a suitable tank, which has a tap and contains 0,2 litres (¼ pint) of clean fuel, to the pump inlet.

6  Connect the fuel pump spill pipe to the delivery valve holder for number 1 cylinder. Put a suitable waste fuel

container below the pipe neck and open the tap, if correctly set fuel should flow (B).

Note:   The outlet from the tank should be approximately 152 mm (6 in) above the pump.

7  Turn the crankshaft slowly until the flow of fuel reduces to a drop which falls from pipe neck every 7-10

seconds. This is then the timing point.

8  Use the value shown by the timing mark (C1) with the injection timing tables given in "Injection timing" on

page 15.

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Continued

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This document has been printed from SPI². Not for Resale

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100 Series

9  If engine timing is incorrect adjust the thickness of shim (D2) to correct.

Note:  If the shim thickness is adjusted by 0,1 mm, the timing will alter by approximately one degree. An

increase in the number of shims will retard the timing, but if the number of shims are decreased this will

advance the timing.

10  Fit the delivery valve.

Notes:

Ensure that the delivery valve holder (D1) is tightened to the specified torque.

For emissions approved engines. If it is necessary to change the fuel injection pump, the fuel delivery must

be reset on a suitable test dynamometer with the new pump. The procedure above, on injection pump

timing explains how to change the timing.

When changing the timing, it is important that this procedure is done before the engine is tested on a

suitable dynamometer.

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This document has been printed from SPI². Not for Resale