INSTRUMENTATION 5.3 Testing the Fuel Sender 1 With the ignition switch off, connect an ohmmeter between the positive and negative terminals of the fuel sending unit. (fig. C306) 2 An ohmmeter reading of 50 to 500 is normal. A read- ing higher or lower means a faulty sender and will need replaced. C306 Fuel gauge wires 5 C4303 Fuel gauge Hour meter Ignition switch C3580 Fuel gauge Hour meter Ignition switch C3581 5-11 Replacement 1 Remove any attachment, raise the boom arms and engage the boom support pins. Shut off the engine and engage the parking brake. 2 Remove the 2 wires connected to the fuel sending unit.
The fuel sender is located just below the lift cylin- der, right hand side, on the fuel tank. (fig. C4303) 3 Remove the 5 screws retaining the sender to the fuel tank. 4 Remove the sending unit and discard the gasket. 5 Install a new sending unit and gasket. Use gasket sealant on both sides of the gasket. 6 Use thread sealant on the screws and torque the screws to 20 inch lbs. 7 Connect the sender wires taking care not to over tighten the nuts and stripping the studs. Green wire is ground. Testing the Hour Meter The hour meter records the number of engine operating hours. To check the hour meter, remove the 3 screws retaining the right hand dash panel to the dash pod. (fig.
C3580, C3581) Using a 12 volt test meter, connect the positive lead to the positive terminal of the hour meter and the ground lead of the tester to a good ground. Turn the ignition switch to the “RUN” position. A reading of 12 volts means the hour meter is operating properly. No voltage reading means there could be a problem in the wire running from the “ACC” terminal on the ignition switch to the positive side of the hour meter or a defec- tive ignition switch.