Gilera 633721, Workshop Manual

Page: 228 / 407

With infinite resistance, the pump does not rotate.
With resistance close to 0
Ω
, the pump power consumption is too high, with the possibility of blowing
the fuse No. 12. Carry out the following check.
Pump consumption check
The pump power consumption may vary according
to:
- Power supply voltage
- Pump running-in
- Regulation pressure
- Delivery filter cleaning
To check the current consumption, proceed as fol-
lows
- Disconnect the pump remote control switch con-
nector.
- With key switch set to " OFF ", connect the jump-
ers 30-87 on the connector using the tester probes
in ammeter function (see figure).
- Check the pump rotation and power consumption
N.B.
THIS CONSUMPTION REFERS TO:
- POWER SUPPLY VOLTAGE = approx. 12 V
- PUMP RUN IN
- SYSTEM PRESSURE = 300 kPa (3 BAR)
- FUEL FILTER CLEAN
Electric characteristic
Current consumption:
approx. 3.5 - 4.2 A
A dirty filter causes an increase of input. If the pressure-relief valve opens, the pump absorbs approx.
6-7A.
In case of excessive input (5A), replace the filter. See pump support overhaul.
If the fault continues, replace the pump.
Fuel filter check
To check the fuel filter inspect the following:
- Free flow
- Current consumed by the pump. A clogged filter causes:
- Poor performance especially at full power
- Pump input increase
Injection
Nexus 500 euro 3
INJEC - 228