Engine Timing; General Description - Perkins New 1000 Series Workshop Manual

New 1000 Series
8

Engine timing

General description

To reach the accurate fuel injection needed for engines to conform to emissions legislation, the latest fuel
injection pumps operate at a static timing very close to TDC.
The timing gears are stamped with timing marks to ensure that they are assembled correctly (A). The marked
teeth of the crankshaft, the camshaft and the fuel pump gears will be in mesh with the idler gear when number
1 piston is close to top dead centre (TDC) on the compression stroke. The marked teeth of the idler gear may
not necessarily be in mesh in this position, because of the different speeds at which the gears rotate.
The fuel injection pump is timed at TDC on the compression stroke of number 1 cylinder. It is important that
fuel injection timing is accurate to conform to emissions legislation. Always use Operation 8-1 or Operation 8-
2 to obtain TDC on the compression stroke of number 1 cylinder accurately.
Caution: The fuel injection pump has a lock screw (B1) which locks the shaft. It is important that the lock
screw is released and the pump shaft is free to turn. The drive shaft of the pump must not be rotated without
the spacer (B2) in position under the locking screw. If the drive shaft is rotated with the locking screw tightened
on to the shaft, the drive shaft will be damaged.
A
Workshop Manual, TPD 1350E, Issue 4
This document has been printed from SPI². Not for Resale
B
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