1. The empty hub lubrication

NSK bearing the front, rear wheel lubrication method has two kinds: one kind is filled with the grease except bearing, wheel hub lumen are filled with grease, the traditional way with lubrication called; The other is only in bearing grease on load, wheel hub lumen thin only coated with grease rust, called the empty hub lubrication.

For car wheel bearing lubrication, someone will be used to fill a grease cavity hub, do not only useless, and harmful. The wheel hub cavity fill after grease, bearing heat is bad, the resistance increases, temperature, grease to speed up the metamorphic; Grease expands, still can squeeze bad oil seal flow out of the grease over of brake shoes on, can make the brake failure, caused the accident. In the cavity besmear only thin thin grease rust, not only can prevent the harm, but also saved a lot of grease. To liberate CA1091, for example, the INA bearing with lubrication a maintenance period (17500 km) four wheels with fat content is 3.5-4 kg, and use empty hub lubrication need only about 0.5 kg, a full save more than 80% hub lubrication. According to the test, with the same force turning wheel, empty hub lubrication can turn 11.5 turn, loaded with lubrication only turn six laps, prove to save lubrication empty hub power is also beneficial. So in practical work, should use empty hub lubrication.

2. The reasonable choice of grease, number

At present, China's vehicle use most of the no. 2 and no. 3 and manufactured calcium, which in general use conditions can meet the requirements, FAG bearing which 2 calcium and manufactured of smaller viscosity, from easy to refill and reduce the friction Angle consideration, such as the use of temperature is not high, with no. 2 calcium and manufactured is relatively appropriate. But no. 2 calcium and manufactured using the highest temperature less than 3, 5 ℃ and manufactured calcium or so, such as in the south or mountain summer driving, bearing high temperature of the case, as the no. 3 calcium and manufactured the effect is good.

Calcium and manufactured in use the biggest problem is bad resistant temperature, its use temperature cannot exceed 70-80 ℃, otherwise, it will soften loss. Car driving under different conditions, the temperature varies greatly. For example, in Beijing area on a mountain with general average driving method, wheel hub bearing temperature of about 60 ℃ or so, can use 2 or 3 calcium and manufactured. If the downhill more, frequent use of braking, brake hub produce the large amount of heat, the heat will spread to the bearing, bearing temperature up to 70-80 ℃, if use calcium and manufactured, will produce flow oil phenomenon. This case, SKF bearing should use calcium sodium and manufactured (or ball bearing grease) and manufactured or lithium. Calcium uranium and manufactured water resistance is poor, cannot be used in the bus often wade. The southern summer, especially long decline, the bearing temperature can be more than l00 ℃, it is best to use the lithium base grease. Otherwise, will make a grease soften loss, not only waste grease, and make the bearing damage in advance.

3. Grease lubrication with graphite plate spring

Some drivers in level 3 maintenance, often need not graphite grease, IKO bearing and with calcium and manufactured lubrication leaf spring, some even just flash oil, such leaf spring damage easily, especially in site, mountain and poor road conditions under the conditions of the road, vehicle turbulence, the impact of the steel plate spring load, are more likely to damage. Graphite with graphite of grease for, graphite-filled steel plate of the rough surface between, improve the stress and impact resistance load ability. Simulation auto leaf spring vibration test showed that use calcium and manufactured for the leaf spring vibration 700 times fracture, and use graphite plate for vibration grease spring l500 times before breaking, long service life more than double.

4. Container, tools to clean

Costumes, distribution of grease, check containers and tools are clean. Costumed containers of grease to cover tightly, prevent mechanical impurities mixed. When using, if discover the grease the surface has dust, sundry, be away, must not stir up. NACHI bearing grease distribution shall use the specialized tools, containers, tools after use plastic bags to cover on the application. To dig after fat, the rest of the grease the surface should be smooth scraping, in order to prevent the points of oil.