Case Compact Tractor T90

Warning: This inspection requires trained personnel with PPE!

Enter the machine's hour meter reading

Are the breaker contact points in good condition?

If not, report the issues to the maintenance team and stop the procedure

Choose the color of the contact points

If the color is black, it is usually due to the presence of oil, dirt or foreign matter.

If the color is blue, it is usually due to overheating because of: 1. Improper alignment of contact points. 2. Excessive high wattage in the primary circuit of the ignition coil. 3. Poor condenser.

Are the contact point surfaces worn out?

Describe the wear pattern and possible causes

Battery terminals and cables dirty or corroded?

Describe the condition of the battery tray, holdown terminals and cable ends

Is the battery case cracked or leaking?

Is the top sealing compound leaking?

Are the vent holes in the filler caps open?

Note: Only add pure or distilled water when the electrolyte level is low. DO NOT OVERFILL.

Amount of water consumed in oz.

Warning: Ensure the battery is removed from the tractor before proceeding

Volt meter connected between the negative and positive post

Enter the amp hour rating of the battery

Load equal to 3 times the amp hour rating connected between the positive and negative posts

Enter the volt meter reading after 15 seconds

Is the volt meter reading less than 9.5 volts?

If the volt meter reading is less than 9.5 volts, the battery should be replaced

Sign off on the battery bench load test

NOTE: On Spark Ignition engines remove the center coil wire to prevent engine from starting

Connect a volt meter (12 volt) between the positive and negative terminals of the battery, Figure F-5

Crank the engine for 15 seconds and record voltage

Connect voltmeter (12 volt) between the starter generator 'A' terminal and ground on starter generator frame, Figure F-5

Crank the engine and record voltage

If voltage is not the same or varies more than .5 volt, check the battery cables, clean and tighten connections

Sign off on the battery cranking voltage test

Ensure the drive belt is adjusted properly.

Disconnect all cables and wires to generator.

Connect ammeter and variable resistance in series between the 'A' terminal and generator frame.

Connect voltmeter from the 'A' terminal to the frame.

Install jumper lead from the 'F' terminal to the frame.

Enter the RPM at which the unit is driven.

Enter the voltage reading from the voltmeter.

Enter the amperage reading from the ammeter.

Is the ammeter reading lower than specified amperage?