To properly maintain hydraulic forklifts, it is necessary to start from five aspects: daily inspection, regular maintenance, specialized maintenance of the hydraulic system, operating standards, and emergency response. Specific measures are as follows:

1、 Daily check: prevent problems before they happen

Hydraulic oil level and quality

Cold machine inspection: Check the hydraulic oil tank level before starting daily to ensure it is between the upper and lower limits of the scale. If the oil temperature is too high (over 80 ℃), stop the machine for cooling and then check again.

Oil quality observation: When hydraulic oil turns black, emulsifies, or contains impurities, it should be replaced immediately to avoid component wear.

Oil leakage investigation: Check whether there is oil leakage in the oil pipe joints, oil cylinders, oil pumps and other parts, clean up the oil stains in a timely manner, and tighten loose parts.

Smooth hydraulic action

When performing lifting, tilting, and other actions, observe for any lag, abnormal noise, or abnormal speed. If the actuator operates slowly without load and is accompanied by the sound of an overflow valve, it is necessary to immediately stop the machine for maintenance to prevent component damage.

Auxiliary system inspection

Braking system: Check pedal travel, brake fluid level, and handbrake effectiveness to ensure reliable braking.

Tire and steering: Confirm that the tire pressure is normal, there are no sharp objects such as nails, and the steering system is flexible and not stuck.

Lighting and Instrumentation: Test the headlights, brake lights, horn, and instrument indicator lights to ensure proper functioning.

2、 Regular maintenance: staged maintenance

Short term maintenance (every 200 hours or monthly)

Cleaning the radiator: Clean the dust on the surface of the hydraulic oil radiator to prevent poor heat dissipation from causing high oil temperature.

Check the oil pipe: Check whether the hydraulic oil pipe is worn or aged to avoid the risk of pipe bursting.

Mid term maintenance (every 500 hours or half a year)

Replace filter element: Replace the hydraulic oil coarse and fine filter elements, filter impurities, and protect the system cleanliness.

Oil detection: Check the viscosity and color of hydraulic oil, and clean the sediment at the bottom of the oil tank if necessary.

Long term maintenance (every 1000 hours or one year)

Comprehensive oil change: Replace hydraulic oil (L-HM 46 anti-wear hydraulic oil is recommended), and different brands of oil should not be mixed.

Professional maintenance: Professional personnel carry out major repairs on hydraulic motors and pumps, and adjust system parameters.

3、 Special maintenance of hydraulic system: protection of core components

Prevent water and air from entering

Moisture control: When the oil storage tank is not in use, tighten the lid and place it upside down to avoid water mixing during maintenance. When the hydraulic oil has a high water content, it needs to be filtered multiple times.

Air removal: Excessive air content in hydraulic oil can cause cavitation and noise, and air needs to be discharged through exhaust valves or repeated operations.

Reasonable selection of hydraulic oil

According to the instructions, select hydraulic oil. In special circumstances where substitution is required, ensure that the substitute oil is similar to the original grade to avoid a decrease in durability.

Prevent impurities from entering

The precision components of the hydraulic system are easily blocked or pulled by impurities, so it is necessary to keep the oil clean. Use a specialized filtering device when replacing hydraulic oil to prevent impurities from entering.

4、 Operation standard: Reduce human damage

Gentle homework

Avoid rough handling that generates impact loads, prevent mechanical structure breakage, hydraulic component damage, or oil pipe rupture.

temperature control

The working temperature of the hydraulic system should be controlled between 30 ℃ and 80 ℃. Excessive oil temperature can reduce lubrication performance and accelerate oil oxidation, requiring temperature control through a radiator or shutdown cooling.

Winter preheating

Under low temperature conditions, operate without load for 5-10 minutes, preheat the hydraulic system before starting work to avoid damage to the seals.

5、 Emergency response: Quickly respond to faults

Hydraulic pump does not deliver oil

Reason: Power not connected, pump shaft reversing, low oil tank level, etc.

Solution: Check the power supply, adjust the motor direction, and add oil to the oil level line.

Slow or weak lifting of the main hydraulic cylinder

Reason: Insufficient hydraulic pump oil volume and low oil pressure.

Solution: Check the output of the hydraulic pump and clean the suction port filter.

Abnormal noise or vibration

Reason: Hydraulic pump cavitation and loose components.

Solution: Shutdown for maintenance, eliminate air or tighten components.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment