Pump Consumption Check; Fuel Filter Check - Gilera Nexus 500 Workshop Manual

Nexus 500
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 10 A fuse No. 2. Perform 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
The a dirty filter causes an increase of the absorption. If the overpressure valve opens, the pump ab-
sorbs approx. 6-7A.
In case of excessive absorption(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 absorbed by the pump. A clogged filter causes:
- Poor performance especially at full power
- Pump absorption increase
Injection
INJEC - 43