17A ENGINE TIMING
General description
The timing gears are stamped with timing marks to
ensure that they are assembled correctly (A). The
stamped teeth of the crankshaft, the camshaft and
the fuel pump gears will be in mesh with the idler
gear when number 1 piston is at 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 pump
gear has timing marks for four and six cylinder
engines. Also the gear is stamped with the letter
"B" where a Bosch fuel pump is fitted. The letter
"M" is stamped on the fuel pump gear to indicate
that the threads for the gear puller are metric.
A data plate is fitted to the pump. An example of
the information shown on the plate (B) is:
Perkins part number (1)
Fuel pump code (2)
Maximum engine no load speed (3)
High idle reset speed (4)
Notes:
• The maximum no load speed (B3) set by Perkins
may be reset by the equipment manufacturer. If the
speed is changed the new speed is shown in the
high idle reset position (B4). The original maximum
no load speed should be removed from the label.
• The adjustment screw for the maximum no load
speed, is sealed by the manufacturer. The setting
must not be changed, unless approved, as it could
affect the warranty of the engine.
For details of the fuel pump code for the engine see
the data and dimensions at the end of this section.
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PA129
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1
High idle reset
PA317
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2
4
2643J000CK/1/2860
Mfg
17A.02 Perkins Phaser/1000 Series, April 1995
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