Archive for the ‘Maintenance’ Category

Posted by kentang123 at October 24, 2016

Category: Maintenance

The average advertised price to replace 4 tires is $400 to $600 for the top tire size sold. Even $1000 is not out of the question. Insuring that you get the most mileage out of your tires is extremely important. Tires are the link between the vehicle and the road, and are constantly subjected to the forces of acceleration, stopping and turning for a vehicle that weighs an average of over 4000 lbs.! Of course you’re going to see tire wear, but the longer you can make your tires last, the less money you will spend maintaining this part of your automobile. Keeping your tires in good shape requires more than just keeping an eye on tire wear and air pressure. It also means practicing safe driving habits, avoiding bad habits, and maintaining all the components of the steering and suspension systems

Proper Tire Maintenance:
Tire Pressure: The tires are your main connection to the road, so be sure they are inflated properly. Under-inflated tires provide less traction, can reduce fuel mileage and can wear out prematurely, so check your pressure at least once a month to ensure you are driving on properly inflated tires. As the temperatures drops, so does the pressure in your tires. The proper tire pressure for your car is not necessary the pressure stamped on the tire. Your vehicle should have a sticker located on the driver’s side door jamb or on the rear edge of the driver’s door that lists the manufacturers recommended tire pressure. Check your tire pressure at least once a month and before every long trip.

Rotation: Tires tend to wear unevenly. The front tires tend to wear on the outside edges because the tire leans over when you turn a corner. With the majority of cars having the engine in front, the front tires also typically bear more weight than the rear tires. Front Wheel drive vehicles have the as well as the engine in front, adding to the weight differential. Rotating tires keeps them from wearing unevenly which extends the life of your tires, saving you time and money in the long run. A side benefit is that regular rotation will make your ride smoother and handling safer. During rotation each tire and wheel is removed from your vehicle, and moved to a different position. Your owner’s manual will tell you how often to rotate your tires, but as a rule of thumb, it should be done every 5,000 to 8,000 miles.

Balancing: Tires and wheels are not perfectly balanced when they are manufactured. When your tires were fitted to the wheels originally, they were measured on a balancing machine. Correction weights are applied to counteract the combined effect of the tire and wheel unbalance, your tires were balanced. The minute you pull away from the tire shop on your new tires, they begin getting out of balance again. Every bump and corner affects balance; so does tire wear, over time, your tires get out of balance again. That’s why it’s important to have tires balanced regularly. There are some warning signs that your tires have become out of balance. You begin to see uneven wear or a vibration over 40 mph especially if the front tires are out of balance. How often should you have you tires balanced? With typical use every 4,000 to 6,000 miles or every time you have your tires rotated.

Safe Driving Habits Help Maintain Your Tires:

Watch your Speed: High speeds will generate excessive heat, which increases the rate of tire wear.

Avoid High Speed Turns and Curves: Taking turns and curves at high speeds will ultimately wear down your tire’s tread unevenly. Hard cornering transfers the weight of the car to the outside wheels, increasing the load on the shoulders, which can significantly increase wear.

Avoid Fast Starts and Panic Stops: Continual acceleration and fierce braking wear away patches from the tire tread, leading to bald spots that can expose a hole in the casing. With tread wearing away from this style of driving, handling is compromised and stopping distance is lengthened. Go easy on the gas and brake, and you’ll have more tread on your tire and less on the pavement, lengthening the time between tire replacements.

Be Aware Of Rough Road Surfaces: Everything you hit in the road, from potholes to debris, has a direct impact on your tire life. Travel on rock and gravel roads is rough on rubber. It tends to take little chunks out of the tire as the sharp pieces of the road act somewhat like sandpaper on your tires.

Avoid Carrying Extra Weight: Overloading your vehicle stresses your tires and can lead to damage. Don’t carry unnecessary stuff in your trunk.

Curbs: Hitting a curb is never a good thing. Running over curbs, or striking one with the sidewall of your tire, can cause a blowout.

Suspension/Steering System Maintenance:
Maintenance of the tires themselves and good driving habits are a good start to optimum tire life, maintaining the suspension and steering system completes the package. The tires are your vehicle’s link to the road and your suspension and steering system is your link to the tires.

Getting all the mileage you can from your tires can be accomplished by getting routine Alignment checks before any irregularities in tread wear show up. Many auto repair shops will do an alignment check for free. Or you can wait until you see problems like

1) Wear on one edge but not the other
2) Uneven wear (alternating high and low) on the
outer edge, known as “feathering”
3) Indentation on the tire surface, known as
“cupping”

Alignment is a complex topic covering a number of parts; basically your tires ’t pointing in the right direction and affecting your safety and the durability of your tires and all the parts controlling them. Misalignment can be caused by imperfections in the roadway (potholes, road crown, rocks) and as suspension parts get worn they tend to bend and flex creating stress & strain forcing the car to pull out of alignment. An alignment is a process of loosening bolts adjusting the position on the component and tightening it back up until the wheels are facing the right direction.

Alignment checks include a complete inspection of all the components of the steering and suspension systems. Worn parts can be replaced before a problem develops.

Regular alignments also satisfy your tire warranty requirements. If your tires carry a warranty or “lifetime certificate,” check the fine print. It’s likely that it includes the requirement of getting periodic alignments to keep tires from wearing incorrectly. Don’t let your warranty be voided by a lack of proper maintenance.

We recommend an Alignment Check every 6000 miles. A lot happens over the course of 6000 miles, pot holes, rough stretches of road or worse a curb jumps out in front of you. If your tires are bowed out of alignment by just .017 in., it’s the equivalent of dragging your tire sideways for 5 miles for every 1,000 you drive. Depending on how severe the alignment is, you can take an 80,000 mile tire and wear it out in 40,000 miles. Obviously if you have an alignment that is severely out, you can wear the tires out in a couple thousand miles.

American Auto Air in Reno uses the latest digital technology to check the alignment on your vehicle and certified technicians to inspect your steering and suspension system components.

Proper Maintenance of your tire and suspension system will provide you optimum tire life, better handling, and a safer ride. And in case you don’t maintain your tires American Auto Air & Repair also has a wide selection on tires available to fit your vehicle.

Posted by kentang123 at October 24, 2016

Category: Maintenance

Here is some analysis on failure models in the process of using the clutch.

Skid
Clutch can affect a smooth start, transfer power and shift smoothly for the motorcycle and it is an important part to make the motorcycle safe, practical and comfortable.

There are many different reasons for this phenomenon:

1. Different material of the clutch friction plate. The wear-resisting performance for those high quality clutch kits are much better than those common clutch under the test of same load and usage time. Of course, the price of high quality clutch is also much higher than the common one. The motorcycle rider can choose high quality or common one according to their needs.

2. Motorcycle overloading will cause abnormal wear of the clutch. With the serious wear, the clutch will suffer skid soon, so it is better for the rider not to overload your lovely motorcycle.

3. Improper maintenance of engine.
3.1 The engine oil has not be changed for a long period, then the oil will have high viscosity and there will be iron scrap inside, which is the main reason for the wear and tear on the surface of clutch friction plate.
3.2 When the clutch control is loose, and the users don’t adjust it in time, then the clutch will be always in the half clutch for a long time, which is a dangerous running condition.

Abnormal noise
Change of load or the moment of clutch engagement during the period of driving the motorcycle may cause abnormal noise.

There are several reasons:

1. The uneven abrasion between friction plate and steel plate will cause sharp sound at the moment of clutch engagement.

2. The contact surface of center bush and pressure plate is too dry because there is no oil on due to the oil viscosity, and then the friction plate will do dry friction and produce abnormal sound.

3. Locking mechanism or adjusting mechanism is loose in the process of using will cause the clutch lose dynamic balance. After a long period of usage, there will be abnormal sound between the parts.

The above three factors which cause clutch noise can be solved by daily maintenance, replacement or adjustment.

In addition to the above three reasons, if the flatness of friction plate is terribly bad or the thickness is uneven, then these will also cause abnormal noise. This requires clutch manufacturers be in strict accordance with the standard and control the height difference and flatness, in order to reduce clutch noise.

Friction plate burnout
The friction material fall off from the friction plate, that is friction plate burnout.

The main reasons are as follows:

1. the friction material doesn’t bond firmly. Main phenomenon is that some friction material is left on the plate after burnout. This kind of situation is very rare, because friction plate manufacturer will do an overall test about the adhesive force before they leave the factory.

2. The friction plate can’t carry too much load and then cause the friction burnout. In this situation, the friction material will fall off, charring on the surface and have a burning smell. This kind of phenomenon is caused by many factors, such as overload, poor quality of engine oil, poor friction materials and incorrect clutch operating mode, such as climbing with half clutch or speed up and gear shift when going up the slope.

Plate burnout have a large influence on driving safety, and will easily lead to major accidents, thus motorcycle drivers need to enhance their safety consciousness, use your motorcycle in a correct way and do regular and reasonable maintenance for your motorcycle.