The maintenance schedule for high-pressure washers should be flexibly adjusted based on usage frequency, operating environment, and equipment type. Proper maintenance can extend the service life of key components such as the motor and pump, thereby preventing failures. The following is a detailed maintenance schedule and key operational guidelines:

I. Cleaning

Proper cleaning, maintenance, and care will extend the service life of your machine. Please inspect and clean the machine on a regular schedule.

① Inspect and clean the wheel assembly, removing any entanglements;
② Regularly clean the inlet pipe filter screen to prevent excessive debris.
③ Regularly clean the water inlet pipe, high-pressure hose, and high-pressure water gun. If they need to be disassembled for storage, be sure to thoroughly clean their fittings.
Then seal it tightly with a clean plastic sheet or bag to prevent sand, gravel, and other foreign objects from entering, thereby avoiding damage to the pump, gun handle, and nozzle during the next operation.
Caution: Do not rinse the machine directly with a water hose. As the machine is not a fully sealed waterproof device, doing so may cause short circuits in the wiring or damage to electrical components.

II. Maintenance

① Use an appropriate container to collect used engine oil.
② Remove the drain plug, drain all the engine oil from the pump, then reinstall the drain plug.
③ Remove the dipstick, add new oil through the fill opening until it reaches the proper level, then reinsert the dipstick.
Note:

The oil in the high-pressure pump should be completely replaced after the first 50 hours of operation, and thereafter every 500 hours; use 15W-40 gasoline engine oil.
When adding engine oil, ensure the level is above the midpoint of the dipstick scale.

III. Motor Maintenance

Electric motors shall undergo periodic maintenance and repair, with any faults addressed promptly. Typically, minor maintenance is performed monthly, and major maintenance is conducted annually.
The minor maintenance items include: cleaning dust and dirt from the motor; measuring insulation resistance; and inspecting and cleaning the motor’s terminal connections.
Inspect all mounting bolts and grounding wires to ensure they are securely fastened; check the operating sound and lubrication condition of the bearings; and inspect, clean, and wipe down the starter assembly and its insulated terminals.
Major maintenance items include: all minor maintenance tasks; cleaning and inspection of the electric motor, with particular attention to ensuring that the stator windings are clean and neatly arranged.
No oil deposits, no bare copper, and no inter-turn short circuits, phase-to-phase short circuits, or ground faults; inspect the rotor end rings and aluminum bars, and perform maintenance on the stator and rotor cores.
Ensure adequate lubrication of the motor during operation; typically, the lubricant should be replenished or replaced after approximately 5,000 hours of operation.
(Sealed bearings do not require lubricant replacement during their service life.) During operation, overheating of the bearing is observed (the bearing temperature should be below 95°C).
Lubricant should be replaced promptly when it degrades.
When replacing the grease, remove the old grease, thoroughly clean the bearing cover’s oil groove with gasoline, and then fill the cavity between the inner and outer rings of the bearing to two-thirds of its volume.
When the bearing life has been exhausted, the vibration and noise during motor operation will increase significantly, necessitating an inspection of the bearing’s radial clearance.