OEM NO.: 0310677040                                      Brake Size:420*214

Rear Axle:290MM                                                            C.B.D:275MM

P.C.D:335MM                                                                   Bolt no.:10

Bolt type:23mm                                                                 Weight:57kg

Specification: 

Standard:EN ,SAE ,GB

Quality Standard：OEM

Meterial Grade：GG 25 ,HT 250

Chemical composition：C: 3.5-3.7 Si: 1.5-2.1% Mn: 0.6-0.9%
                                     P:<0.12% S: <0.1% Cr:0.6-0.9% Cu:0.3-0.8

Mechanics performance：tensile strength: ≥ 250Mpa

Hardness：HB180-225

Non-Destructive Test：Metallurgical test

Dimension inspection：dimension inspection report

Production according to：customer's drawing or OEM number

Maintenance:

1.       The brake drum should be replaced when it has cracks, or the inner diameter has exceeded the maximum allowable repair size.

2.       It should be replaced or boring when surface groove or serious injury.

3.       The brake system need to keep dry: the driver is suggested to blow dry at the maintenance station when it is wet, on the one hand, the braking function of the brake system is restored, on the other hand it will be blown away by the sediment carried by the rain to reduce the damage to the brake system. If the condition is not allowed, the owner can brake at a safe speed, let the brake shoe and brake drum or brake disc friction generate heat, evaporate the moisture, and the vehicle drivers will step on brake several times  , so that it can achieve the purpose of drying.