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80. To replace fuel injector (Fig. 19)
(a) AB1W Examine the joint washer and renew if necessary.
(b) AC1W A new nozzle shield washer (A) MUST be fitted before the
injector (B) is replaced This washer must be fitted so that the dimple
side is away from the injector nozzle.
(c) It is MOST IMPORTANT that the pump-to-injector pipe is correctly
fitted or the pipe and injector may be damaged. Proceed as follows
(i) Loosely fit the injector flange nuts
(ii) Fit the pipe and tighten the union nuts finger tight, then give them
a third of a turn with a spanner
Tighten the injector stud nuts evenly, using a torque spanner set
(iii)
to the figure shown under Technical Data.
Reconnect the leak-off pipe.
(iv)
81. To adjust speed control (Fig 20 & 21)
The centrrfugal forces on the governor balls are transmitted to the fuel
pump rack These forces, which vary with the speed of the engine, are
balanced by an adjustable speeder spring This adjustment allows a set
range of speed To adjust the speed outside this range a different fuel
pump and springs may be required and these are obtainable from Fetters
Ltd or their agents. The speed is set by Fetters Ltd and should not require
further adjustment. However, if the setting is disturbed, adjustments are
carried out as follows:
(a) Fixed speed
(i) Loosen the locknut (C) on the dipstick side of the engine and
screw in the adjuster (B) to increase the speed or out to
decrease it. Tighten the locknut The speed should be set at 4%
above the rated speed as shown on the engine nameplate.
when running without load.
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