How to Replace Consumables in the Longxin Four-in-One Air Compressor

How to Replace Consumables in the Longxin Four-in-One Air Compressor

Consumables replacement cycle

Air filter element

It is recommended to replace this every 2,500 hours of operation, or as required by the operating environment.

Clogging may result in increased fuel consumption and reduced air output.

Oil Filter

Replace for the first time at 500 hours, thereafter every 2500 hours, or as dictated by environmental conditions. Must be replaced simultaneously with the lubricating oil.

Oil-gas separator filter element

Replacement interval: 2,500 operating hours or annually.

Blockage may cause elevated internal pressure, increased host current consumption, or oil leakage.

Coolant (lubricating oil)

Replace after the initial 500 hours of operation, then every 2500 hours thereafter

or annually. Use only dedicated screw air compressor oil;

this constitutes the core maintenance requirement.

Consumable Replacement Intervals

Precision Filter Cartridge

Replacement interval: 3000–4000 hours.

Replace promptly when differential pressure exceeds 0.5 bar.

Automatic Drain Valve

It is recommended to clean this valve every six months and inspect it weekly for blockages to prevent obstructions.

Safety Valve Calibration

This valve must be calibrated annually by qualified personnel to ensure operational safety.

Standard Operating Procedure for Consumable Replacement

Power-Up and Warm-Up

Operate the machine for several minutes

to raise oil temperature, facilitating

complete drainage of old oil.

Shutdown and Power Disconnection

Shut down the machine, disconnect power supply,

and affix warning signs to ensure operational safety.

Locate Components

Open the oil filling port, locate

the oil filter and drain port.

Draining Old Oil

Place a container underneath, unscrew the drain valve, and completely drain the old oil.

Standard Operating Procedure for Consumable Replacement

Remove old oil filter

Utilise specialised tool to remove old oil filter.

Install new oil filter

Apply fresh lubricant to the sealing ring of the new oil filter, then hand-tighten.

Refill with new oil

Close the drain valve and add the specified grade of new lubricating oil through the filler port to the standard oil level.

Test run inspection

Start the machine for a test run and check for any leaks.