1. Daily Inspection of Concrete Pump Truck

Before starting construction, operators should carefully check the following items:

1. Check Hydraulic Oil Level and Quality

Inspect the hydraulic oil level regularly. The hydraulic oil should appear light yellow, clean, and transparent without emulsification or cloudiness.

If the oil becomes contaminated, milky, or unclear, it must be replaced immediately to prevent hydraulic system damage.

2. Check Lubrication System and Water Tank

• Fill the grease lubrication system with sufficient grease.

• Fill the main water tank and backup water tank with clean water before operation.

• Ensure the lubrication system is working properly.

3. Inspect Cutting Ring and Wear Plate

Check the wear condition of the cutting ring and spectacle wear plate.

If excessive wear is found, replace them immediately.

Also check whether the concrete piston seals are working properly. No mortar or concrete slurry should leak into the water tank.

4. Check Automatic Lubrication System

Confirm that the progressive grease distributor is operating correctly.

During operation:

• The indicator rod of the progressive distributor should move back and forth normally.

• Lubricating grease should overflow from:

• S-pipe swing arm bearing

• Agitator shaft bearing

This indicates that the bearings are receiving proper lubrication.

5. Check Hydraulic Oil Suction Filter Vacuum Gauge

Check the vacuum gauge on the main hydraulic pump suction filter.

The pointer should remain within the green zone.

The vacuum pressure should not exceed:

0.035 MPa

If the reading exceeds the specified value, inspect or replace the filter element.

6. Inspect Hydraulic System Leakage

Check all hydraulic components, pipelines, and connections.

There should be no:

• Hydraulic oil leakage

• Oil seepage

• Loose hydraulic fittings

7. Check Concrete Delivery Pipeline

Inspect the concrete delivery pipes by tapping method to determine wear conditions.

Check that:

• Pipe joints are properly sealed

• Pipe clamps and safety locks are correctly installed

2. Chassis Maintenance of Concrete Pump Truck

The truck chassis is the foundation of the entire concrete pump system. Regular maintenance helps ensure reliable operation.

Engine Oil and Filter Maintenance

First Maintenance

After the first 50 operating hours, replace:

• Engine oil

• Engine oil filter

• Diesel fine filter

Clean:

• Diesel coarse filter

• Air filter

Regular Maintenance

After the initial service, engine oil should generally be replaced every:

250 operating hours

When adding engine oil, always use the same grade and specification recommended by the manufacturer.

Daily Engine Oil Inspection

During operation:

• Check engine oil level every 10 hours or daily.

• Refill immediately if the oil level is insufficient.

Power Take-Off Gearbox Maintenance

The gear oil inside the power take-off gearbox should be replaced:

• First replacement: after 200 operating hours

• Afterwards: every 1000 operating hours or every 6 months

The bearings inside the power take-off gearbox should be greased every:

1000 operating hours

3. Concrete Pumping System Maintenance

The pumping system is the core working component of a concrete pump truck. Regular maintenance is critical for stable pumping performance.

Hydraulic Oil Maintenance

Check hydraulic oil level and quality every:

8 operating hours

If necessary, add or replace hydraulic oil.

Important:

• The new hydraulic oil must have the same grade as the existing oil.

• The factory-filled hydraulic oil is generally Esso H46 hydraulic oil.

Complete hydraulic oil replacement is recommended after:

• Pumping approximately 20,000 cubic meters of concrete

• Or operating for 6 months

During oil replacement:

• Clean the hydraulic oil tank

• Drain hydraulic cylinders completely

Lubrication System Maintenance

Check lubrication grease level every:

8 operating hours

Recommended grease:

Non-extreme-pressure semi-fluid lithium grease

During concrete pumping, grease should overflow from:

• Concrete cylinder water tank connection

• S-pipe large and small bearing seats

• Agitator end bearing seat

This ensures proper lubrication of moving parts.

Wear Plate and Cutting Ring Inspection

After pumping approximately:

3,000 cubic meters of concrete

Check the clearance between:

• Cutting ring

• Spectacle wear plate

If severely worn, replace immediately.

Also inspect the concrete piston seal to ensure no mortar enters the water tank.

S-Pipe Bearing Maintenance

After:

500 operating hours

Inspect:

• S-pipe wear condition

• Bearing area condition

Replace the bushing and taper sleeve if necessary.

Hydraulic Filter Maintenance

Monitor the suction filter vacuum gauge.

When the pointer reaches the red area:

Above 0.04 MPa

Replace the filter element immediately.

System Pressure Inspection

Before starting operation:

Check:

• Hydraulic system pressure

• Pumping system performance

• Hydraulic leakage

Ensure all systems are functioning normally.