Battery |
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Location | Left fender |
2.Starting Circuit: this circuit supplies electrical power for engine starting, providing the interlock is engaged and electric clutch is switched OFF. The operator seat switch is bypassed in this mode.
When the ignition switch is turned to the START position, battery voltage is available from the switch to the electric clutch switch. When the electric clutch switch is in the OFF position, current passes through the center switch tap to the normally open neutral lock switch. When the neutral lock is engaged, the switch is closed and current flows through one switch circuit to the starter for engine cranking.
Current from the ignition switch passes through the electric clutch switch, when it remains in the OFF position, to and through the other neutral lock switch circuit and on to the fuel
In summary, this is a safety control circuit which inhibits the supply of heavy current to the starter motor, unless the electric clutch switch is in the OFF position and the neutral lock is engaged.
Figure
storing and charging specifications.
Common circuit failures are usually caused by shorting, corroded or dirty terminals; loose connections, defective wire insulation or broken wires. Switches, solenoids and ignition components may also fail, causing a shorted or open circuit.
Before attempting any failure diagnosis of the electrical system, use a test light or voltmeter to check the battery voltage. If the battery voltage is satisfactory, check the cleanliness and tightness of the terminals and ground connections. A general understanding of electrical servicing and use of basic test equipment is necessary for troubleshooting and repair.
Major overhaul or repair of the starting motor or alternator should be performed by trained technicians only.
Although integral, the tractor electrical system can be described as three separate circuits for explanation and troubleshooting.
1.Run Circuit: this circuit supplies needed continuity for normal operation of engine, controls and electric clutch while the operator remains seated on the tractor. For personal protection, the engine will stop should the operator become unseated while operating the tractor, when the neutral lock is disengaged or the electric clutch is switched ON.
When the ignition switch is turned to the RUN position, battery voltage is supplied from the switch to the operator’s seat switch. When weight is applied to the seat, the normally open seat switch closes and completes the circuit through the relay coil to ground. Current flowing through the relay coil closes the normally open relay switch, which completes the circuit to the neutral lock switch and fuel
So long as appropriate weight remains on the seat, the engine will run when the electric clutch switch is ON and/or the neutral lock is disengaged. However, when weight is removed from the seat, the engine fuel
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3.Accessory and Instrument Circuit: this circuit is used for the warning lights and audible signal connected to the engine oil, alternator and water sensing units. It also supplies power for the hour meter and electric clutch switch.
When the ignition switch is turned to the RUN position, battery voltage is supplied to the engine alert system via ignition switch terminals. Grounding, to complete the circuit and signal the operator, is through the oil pressure and water temperature sending units.
The alternator warning light is connected between the ignition switch and the alternator field circuit.
The ignition switch also supplies battery voltage through the
Burnishing the electric clutch
WARNING: To insure maximum performance and life, it is necessary to burnish the clutch.
The electric clutch will need to be burnished properly if a new clutch is installed. Burnishing the clutch develops maximum contact between the clutch armature and the rotor. To burnish the clutch use the following procedure:
1.Attach an implement to the tractor PTO shaft per the implement’s mounting instructions.
2.Cycle the clutch on and off 50 times (15 seconds on and 15 seconds off) with the engine operating at low idle, approximately 1500 rpm. Make certain that the PTO shaft comes to a complete stop between cycles.
Access to engine and hydraulic pumps
WARNING: Always wear adequate eye protection when servicing the hydraulic system, battery and cooling system.