Pressure sender 701/80327 JCB 3CX/4CX, genuine

For the JCB 3CX and 4CX backhoe loaders: pressure sender 701/80327, a genuine JCB part. The card also lists 2848A051.

Pressure senders differ in switching pressure, thread size and connector type, and a sender with another switching pressure triggers the warning at the wrong time, so it is chosen by part number. The sender body has a hexagon, and it is tightened by the hexagon, not the body, to the specified torque. Use a suitable seal on the thread, but do not coat the whole thread in sealant, since some senders take their earth through the body. In systems with a warning lamp, the sender works like a switch: its contacts are open at normal pressure and close when pressure drops, lighting the lamp. With the ignition on before the engine is started, the oil pressure lamp should light, which proves its circuit. If the lamp does not light at that point, check the bulb, wiring or sender. In systems with a gauge, the sender's resistance changes with pressure and the gauge needle shows this as a pressure value.

Specifications

Compatibility

According to the product card, this is the Perkins 2848A051 engine oil pressure sender. The catalogue also has the aftermarket version (option 1) and aftermarket version (option 2) of this part. Other parts are in Sensors.

Fitting

Moisture and corrosion inside the connector are a common cause of false signals from sensors and switches, so clean the connector and use contact spray if needed. Renew the connector seal if it is missing. The part is chosen by part number, and its connector type is compared with the old part.