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Tyre Daily Inspection

As we all know, incorrect usage will strongly shorten the tyre life. In order to avoid unnecessary scrap, we suggest that mine site should inspect the running tyre periodically.

Precautions during inspection:

1.Safety wear must be dressed, which include protecting suit, hard cap, safety shoes, gloves and the protect glasses;
 
2.It's better to inspect the tyre not loaded, if you have to inspect tyre in loaded truck, please keep a safety distance with the truck and keep special attention to the rolling stone from the truck. Better not inspect the truck in queue;
 
3.Truck driver should turn off the engine during the inspection then hang up a safety warning tag in front of the truck. At least two persons are required to do the pressure test, so that one person can measure the pressure, the other one can coordinate the communication between truck and driver.

Tools needed for tyre inspection:
 
Flashlight, measure tape, depth gauge, barometer and soap water(to test the air leakage).
 
Inspection Points:
 
To avoid tyre mulfunction, it is required to inspect tyre rim, valve, pressure frequently. See the below process of inspection.

Tyre Tread:
 
Different pattern has the different measuring position, you re required to measure tread depth by the standard which is designated by tyre manufacturer. The tools must be calibrated before measurement.
 
⊙Remove any foreign matter from the tread
⊙If tread separation exists, remove tyre and repair;
⊙If cuts or chips reach carcass, the tyre must be repired;
⊙Cracks in tread groove may be caused by leakage, check inflation pressure;
⊙Uneven wear may be caused by improper inflation pressure, change tyre if necessary;
⊙Contact damage with vehicle should be avoided, change components it necessary;
⊙Wash off the oil or grease on tread.

                                                                                              
●  Shoulder and sidewall:
 
⊙Repair any cuts reaching the carcass;
⊙Identify cause of cracks e.g. under-inflation, overloading, ozone, cut, etc, and repair it if necessary;
⊙Wash off oil or grease spots.

● Valve:
 
⊙Replace valve or valve parts if leakage exists from valve core. deflection of stem or extension;
⊙Ensure valve cap is in good condition.

● Dual Tyres:
 
⊙Make sure to remove any foreign object stuck between duals;
⊙Repair stone ejector if bent or out of position.


● Inflation Pressure:
 
⊙Check the tyre pressure when it is in cold condition;
⊙Clean the valve before measure the pressure;
⊙Adjust if the pressure rating difference 10% more than Hainan recommended;
⊙Detect location and repair if leakage exists.

Note: You should wear the eye protector during the inspection. Never leak the air of hot tyre.

Rim: ⊙ Replace the rim if deformation or cracks exist.


● Tyre Removal:
 
⊙The results of tyre removal: ship back to the warehouse, repair, retread or scrap. When the tyre was removed, we should carefully inspect the tyre damage area and decide whether tyre can be repaired or retreaded. this will help save cost;
⊙Please take note of surrounding safety when tyre remove, you're required to puttyre on ground horizontally then start to inspect;
⊙You need to inspect the internal part of tyre carefully if want to check the tyre usage and decide whether retread or repair.

● Tyre Usage Records:
 
⊙The detailed tyre records are needed, and it's very important to send them back to Haian periodically;
⊙The running distance of new repaired tyre should be recorded monthly and separately, also the serial number is needed for each tyre(pls refer to the serial no provided by repair station for the repaired tyre ).You re required to make a tyre record card for each tyre;
⊙This card records the basic info, of usage repair, which is very helpful for our judgment, please fill it completely;
⊙If the tyre position are changed or out of service, the record card must be noted with: the changed date, serial number, position, actual running distance, the reason of change or removal and the average RTD.

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