Measuring voltage is one of the most common tests a tractor mechanic will conduct as he troubleshoots a system. The presence of the correct voltage will determine if a component is functioning correctly or not. A common voltage test will be of the battery. A healthy battery should read about 12.5 volts, and a battery that is being charged should measure between 13 and 14.5 volts.
Digital Multi-Meters come in two common varieties: Auto- Ranging, and Non Auto-Ranging. A non auto-ranging meter requires you to select a range of “sensitivity” for the given function you are using. For example if you want to measure resistance, you would need to select a range of up to 200 ohms, up to 20Kohms (20,000 ohms), 200Kohms, etc. An auto-ranging meter will automatically figure out the range and give you a measurement.
In 2015 I built a Front end Loader and a backhoe for a 1974 International Harvester Cub Cadet 149. I built the reservoir into one of the loader towers, and ran an 8 GPM gear pump off of the engine’s front PTO Shaft. This pump was connected to a 2 spool directional control valve with a power beyond port. This power beyond port supplied oil to a 6 spool control valve that controlled the backhoe. My hydraulic system is set to have a maximum pressure of 1,000 psi.
Pressure: Is the resistance to flow normally created by a load. This is expressed as Pounds per square inch or PSIFlow: This is the rate of which fluid flows through a system. This is expressed as Gallons per Minute or GPMDisplacement: This is the volume of fluid.