FUEL SYSTEM - N.8
Fig. N.13.
1.
Drive Shaft.
6.
Maximum Speed Screw.
2.
Fuel Outlet.
7.
Fuel Inlet.
3.
Stop Lever.
8.
Injector Pipe Connections
4.
Idling Screw
9.
Bleed Screws.
5.
Speed Control Lever.
10.
Inspection Cover Plate.
11.
Scribed Line.
When fitting a replacement fuel pump, or in the
event of the maximum speed screw having been moved
for any reason, the maximum no load speed must be
checked and re-set as necessary.
The maximum no load speed will depend upon the
type of application to which the engine is fitted, and for
details of this, reference should be made to the code
number stamped on the fuel pump data plate. The last
four numbers in the code indicate the speed required,
and in the case of the example quoted below, this would
be 2660 rev/min.
Code Example:—PS66/500/2/2660
NOTE: If the fuel pump data plate is damaged or
defaced so as to make it impossible to read the
code, or if the code is not stamped on the plate, you
are advised to contact your nearest Perkins
Distributor, or alternatively, Service Dept., Perkins
Engines Limited, Peterborough, to obtain the correct
maximum no load speed setting.
To set the maximum no load speed the following
procedure should be adopted:—
1.
Check the fuel system for leaks and rectify as
necessary. Ensure that no air is present in the
system.
2.
Run the engine at part throttle until full operating
temperature has been reached.
3.
Place a tachometer with a suitable extension
and drive adaptor in the centre of the crankshaft
pulley retaining screw.
4.
Open the throttle until the maximum speed,
given on the pump data plate, is obtained. If the
speed will not reach this figure, turn the
maximum speed screw anti-clockwise until the
required speed is obtained. Should it be
possible to obtain a higher speed, turn the
maximum speed screw clockwise until the speed
is reduced to the required figure. Re-seal the
maximum speed screw.
IMPORTANT. Under no circumstances should the
engine be allowed to operate at
