OEM 819951990 The XCMG Plug-in Pressure Switch 819951990 is a genuine plug-in pressure sensor that signals the controller when hydraulic pressure reaches a set level on XCMG hydraulic excavators.
Issued under the official part number 819951990, the switch gives the technician a correctly rated unit that matches the port thread, set point and plug-in connector it is designed for.
The plug-in body and diaphragm are machined to the XCMG drawing, so the thread, hex and sealing face fit the pressure port without adapters or extra sealant.
A matched diaphragm and spring snap the contacts at the set pressure, so the switch signals cleanly instead of drifting or chattering.
The plug-in connector snaps onto the harness without tools, so the technician can fit or release the switch quickly during service.
A sealed body and plated finish resist oil, water and corrosion, so the switch keeps its signal through wash-down and long outdoor duty.
Every unit is checked for set point, contact action, thread and insulation resistance before the batch is packed for shipment.
Fitted to filter, pilot and main hydraulic circuits, this plug-in pressure switch keeps the control system informed and the machine safe to run.
The 819951990 switch is produced to the XCMG drawing, so the thread and sealing face fit the pressure port on the first attempt.
A calibrated set point makes the contacts snap at the right pressure, so the controller gets a clean, repeatable signal.
The plug-in connector snaps onto the harness by hand, so the technician can fit or release the switch fast without tools.
A sealed body and connector keep water and dust out of the contacts, so the switch does not corrode or give false readings.
A matched diaphragm and spring resist pressure cycling, so the switch does not drift or chatter after long service.
Because the part matches the OEM number, a fitter installs it straight from the bag without adapters or extra sealant.
Correct material strength keeps the body intact under pressure pulses, so the switch does not crack or leak at the thread.
A sound switch also protects the pump, which stops running dry when pressure drops and the signal reaches the controller.
Keeping a spare switch on the shelf shortens repair time, so a failed sensor does not turn into a full day of lost work.
Each lot begins with certified steel body stock and diaphragm material tested for strength, hardness and oil resistance before machining.
Bodies are turned and threaded in controlled tooling, so the thread, hex and sealing face stay uniform from batch to batch.
Every switch is calibrated on a test bench, so the set point and reset differential match the value printed in the drawing.
Inspectors check thread gauge, set point, contact action and insulation resistance against a gauge for this exact part number.
Batch records trace every 819951990 switch to its component lot and production run, so a quality question is settled quickly.
A pressure switch senses hydraulic pressure and sends a signal to the controller, so the machine knows when the circuit is ready.
A failed switch can leave the pump running dry, block a function or trigger a false fault, which stops the machine.
The genuine 819951990 signals accurately, so the controller protects the pump and keeps the hydraulic system working safely.
Correct fit avoids both a switch that leaks at the thread and one that sits too deep and blocks the pressure port.
A sound switch protects the pump, valves and cylinders, which keeps service intervals predictable and extends machine life.
The 819951990 switch is installed with a cleaning cloth, a spanner set and a multimeter during hydraulic or electrical service work.
Release system pressure, drain the affected line and clean the port so no dirt or metal chips enter during the repair.
Check the port thread and sealing face for damage, rust or old sealant, since a rough surface will stop the switch sealing fully.
Lubricate the thread where the drawing allows, then run the switch in by hand until it contacts the seat.
Tighten to the torque in the service data, so the switch seals without cracking the body or distorting the diaphragm.
Push the plug-in connector onto the switch until it clicks, then run the machine slowly and check the signal with a multimeter.
At service intervals, look for oil film, a loose plug or a drifting signal and renew the part before the machine faults.
Every 819951990 switch is produced in an ISO 9001 and ISO 14001 certified plant with traceability from component to carton.
Incoming parts are tested for strength and hardness, and finished switches are gauged for thread, set point and contact action.
Each batch is screened for cracks, leaks and insulation faults, since these defects cause false signals or switch failure.
Post-production checks include visual review, dimensional verification and a trial fit in the XCMG port fixture.
Sample switches from each batch undergo pressure, cycle and salt spray tests to confirm signal accuracy and corrosion performance.
Cheap copies often use soft diaphragms or poor contacts, so the switch drifts, chatters or fails to signal at the set pressure.
A switch with the wrong thread or set point can leak at the port, block the circuit or trigger constant false faults.
The genuine 819951990 is made to the XCMG drawing, so thread, set point, connector and material match the original part.
Using genuine XCMG parts also preserves warranty coverage, protects resale value and keeps fit with OEM circuits.
Backed by XCMG global quality standards and technical support, this plug-in pressure switch performs reliably in harsh conditions.
Choosing the genuine 819951990 switch prevents a small signal fault from turning into a damaged pump or a blocked function.
A failed switch can leave the pump running dry, which damages the pump and shortens component life.
A correctly made switch signals firmly, so it does not need repeated replacement and does not trigger false faults.
Reliable switches also keep the circuit protected, which improves machine performance and lowers ownership cost.
Service records from construction and mining fleets show genuine XCMG parts cut unplanned downtime.
XCMG produces the 819951990 switch with efficient machining and calibration runs that keep production scrap low.
A long service life means fewer replacements, which lowers the material and energy tied to each switch.
Protecting the hydraulic circuit prevents oil leaks and contamination, which protects soil, groundwater and internal parts.
The materials in this part comply with RoHS and REACH requirements for safe handling and responsible recycling.
The 819951990 switch is stocked in XCMG depots serving North America, Europe, Asia and Australia.
Each unit is bagged to protect the connector and thread and boxed in a strong carton that guards against dust, damp and crushing.
Fleet buyers can request volume pricing and combined freight, which simplifies planning and lowers landed cost.
Live stock data and responsive supply teams cover urgent requests fast, so machines return to work sooner.
Careful packing keeps the connector and diaphragm undamaged until fitting, avoiding the damage seen in loose storage.
The XCMG Plug-in Pressure Switch 819951990 is a small but important sensor on XCMG excavators, signaling the control system at the right pressure.
Its accurate set point, sealed plug-in connector and durable body deliver dependable signals in rain, dust and heat.
By keeping the circuit monitored, this switch cuts downtime, protects the pump and extends the life of the machine.
Buy only genuine XCMG parts from authorised dealers to secure real quality, correct fitment and lasting performance.
Specify the 819951990 switch for dependable pressure sensing and confident, trouble-free servicing.
Work with XCMG, a trusted supplier of engine and hydraulic components for heavy equipment that delivers real value.
OEM 819951990 – XCMG Plug-in Pressure Switch – the definitive plug-in sensor for accurate, reliable control signals on your excavator. Calibrated to the drawing, finished for a precise fit, and backed by global quality standards. Trust the original to protect your investment and maximise uptime.
