Other

How does the Trans work on a magnum 7120?

How does the Trans work on a magnum 7120?

There is another switch that can turn on the trans. system pressure warning as well. If you look at the PFC hydraulic pump, you will see a pressure switch threaded into it as well. It watches for excessive case pressure inside the PFC pump and turns on the trans. system pressure warning as well if case pressure is excessive.

What causes oil leak on a magnum 7120?

The diaphragm in the switch would rupture, causing oil to actually to fill up in the wires of the switch itself. Eventually, the wires would fill up with oil and then cause the slight external leak I’m talking about. Very common problem on that vintage of Magnums. Good luck!

Where is the pressure switch on a magnum 7120?

The first one is the switch that does watch system pressure. On older 71xx series, it is located down by the transmission control valve, right by the accumulators. Generally, that setup was used on 2-speed reverse tractors.

Where is the transmission control valve on a magnum 71xx?

On older 71xx series, it is located down by the transmission control valve, right by the accumulators. Generally, that setup was used on 2-speed reverse tractors.

There is another switch that can turn on the trans. system pressure warning as well. If you look at the PFC hydraulic pump, you will see a pressure switch threaded into it as well. It watches for excessive case pressure inside the PFC pump and turns on the trans. system pressure warning as well if case pressure is excessive.

The first one is the switch that does watch system pressure. On older 71xx series, it is located down by the transmission control valve, right by the accumulators. Generally, that setup was used on 2-speed reverse tractors.

The diaphragm in the switch would rupture, causing oil to actually to fill up in the wires of the switch itself. Eventually, the wires would fill up with oil and then cause the slight external leak I’m talking about. Very common problem on that vintage of Magnums. Good luck!

On older 71xx series, it is located down by the transmission control valve, right by the accumulators. Generally, that setup was used on 2-speed reverse tractors.

Author Image
Ruth Doyle