Installing and checking the pick-up
The pick-up should be installed in the following manner:
Adjustment of a new pick-up
Screw the pick-up in the 1.5 pitch threaded hole M16 placed on the bell until contacting the ring gear then tighten the
locknut.
Adjustment of an operating pick-up
If the pick-up has already been operated, after screwing against the ring gear loosen by 1/2 turn and then lock so as
0.65 to 0.75 mm gap may be obtained.
Fig. 32 - Pedal accelerator potentiometer.
INSTALLING AND CHECKING THE PEDAL ACCELERATOR (Fig. 33)
Mount potentiometer P on support S, use special plate Q and pin T to obtain correct positioning and fixing.
Fit lever L, bushing B, washer R and snap ring G. Connect the electric circuit as shown in figure and use a 5 V battery
to provide power supply.
setting engine low idling speed
— Turn screw V2 until a VU voltage = 1000
±
30 mV is obtained; then lock nut E2.
setting engine fast idling speed
— Move lever L against screw V1 and operate the screw until a VU voltage = 4000
±
30 is obtained; then lock nut E1.
adjusting accelerator pedal stroke
— Move accelerator pedal A against stop F placed on platform (top acceleration position as shown in figure 33).
— Turn adjusting nut D until lever L contacts the stop screw and then tighten locknut C.
— Loosen nut E1, loosen screw V1 of 2 full turns and lock nut E1 again.
Putting into operation the electronic governor
Switch on dashboard with the ignition key.
If the LED on the accelerator control card blinks, decode the fault (refer to SELF-DIAGNOSIS section). Depressing
push button HOLD the LED should illuminate, depressing HOLD button a second time the LED should go out.
If the LED does not light up operate as follows:
Make sure the card is properly supplied (12 V, no. 20 fuse in fusebox).
Check for card operation measuring actuator voltage. This voltage should be 0.1 to 0.6V direct voltage.
Otherwise, either the card is not operating or the actuator is disconnected or defective.
After these checks are concluded and being sure all is in good order, start the engine, remove the upper actuator cap
and insert a 5 mm Allen wrench on the injection pump control rod drive pin so that the injection pump control rod may
be moved to stop position, when irregular engine running is noticed after starting the engine.
Keep on checking ensuring the pick-up voltage be at least a 10V alternate voltage and the direct current measured on
the actuator with engine running unloaded at low idling speed be 1.5 to 1.7A.
If the engine does not start operate as follows:
Ensure pick-up voltage during starting attempt be at least 3V, otherwise check for pick-up correct installation.
Make sure the battery voltage during starting stage never drops below 5.5V.
Ascertain the actuator current during starting stage is at least 2.5A and the actuator moves the injection pump rod.
Check hand control functions through the push-button panel and the hand throttle LED.
Ensure the pedal potentiometer voltage is 1 to 4V.
Note: The hand throttle control push-button panel LED, besides signalling the HOLD condition also helps in diagnosing
malfunctions.
engine
fuel system
16
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68
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