The portable machine tools classified as either cutting took (straight and machine tools, can quickly and easily be moved to the angle hand drills, metal sawing machines, and metal cutting workplace to accomplish machining operations. The accuracy shears) or finishing tools (sanders, grinders, and polishers). of work performed by portable machine tools is dependent upon the user’s skill and experience.
- Hidraulick Pump
Gear pumps (with external teeth) (fixed displacement) are simple and economical pumps. The swept volume or displacement of gear pumps for hydraulics will be between about 1 cm3 (0.001 litre) and 200 cm3 (0.2 litre). These pumps create pressure through the meshing of the gear teeth, which forces fluid around the gears to pressurize the outlet side. Some gear pumps can be quite noisy, compared to other types, but modern gear pumps are highly reliable and much quieter than older models.
Harga bahan bakar minyak terus mengalami kenaikan. Hal inilah yang membuat pabrikan otomotif memutar kepala, untuk bisa melahirkan kendaraan ramah lingkungan seperti mobil listrik dan hidrogen.
Dan kali ini 4 pabrikan yakni Mercedes-Benz, Honda, Toyota, dan Hyundai siap menguji mobil hidrogen mereka dengan berkeliling ke Eropa. Wah, ini akan menjadi ajang yang seru sepertinya.
Seperti dilansir, automotive, Mercy, Honda, Toyota, dan Hyundai akan mengikuti European Hydrogen Road Tour 2012.
Tour ini akan melintasi 9 kota besar di Eropa. Perjalanan pun diawali dari di Hamburg Jerman, Hannover, Bolzano, Paris, Cardiff, Bristol, Swindon, London, dan Kopenhagen.
Ajang European Hydrogen Road Tour 2012, juga memiliki tujuan untuk meningkatkan kesadaran akan mobil hidrogen.
Selain itu dengan digelarnya ajangnya mobil hidrogen ini bisa mengukur minat konsumen akan kendaraan hidrogen.
"Namun, keberhasilan teknologi ini sangat bergantung pada kondisi tertentu, seperti ketersediaan infrastruktur hidrogen nasional,"kata Director Drive Development Fuel Cell System Daimler AG, Christian Mohrdieck.
After rear brake caliper or shoe servicing, loosen the parking brake adjusting nut, start the engine and depress the brake pedal several times to set the self-adjusting brake before adjusting the parking brake. Block the front wheels before jacking up the rear of the car. And Do not open or close the power roof when the car is raised by using the safety stands
- Raise the rear wheels off the ground
- On cars with rear disc brakes, make sure the lever of the rear brake caliper contacts the brake caliper pin.
a. Dirt in the Lubricating System
The presence of dirt particles entrained in the lubrication system is one of the most frequent causes of bearing damage. The root of the problem is usually that the engine is not sufficiently clean. In line with the nature and size of the foreign
particles, the bearing will exhibit a correspondingly lesser or greater degree of circumferential scratching and, usually, any debris that may have become embedded in the lining.
Recommendation : when repairing the engine, ensure that the entire lubrication system is carefully cleaned
b. Dirt on bearing back
The presence of a foreign particle trapped between the bearing back and its housing will lead to a raised area, with the ensuing risk of contact between this protruding high-spot and the journal. Signs of this will be seen in the area opposite
the particle, along the inner surface of the bearing, where there will be evidence of marked localized wear. Recommendation : ensure that all housings in which bearings are to be seated, are carefully cleaned prior to assembly.
Some overheating problems aren’t related to the cooling system at all. Other circumstances that can cause a vehicle to overheat include lack of oil, a blown head gasket, and transmission problems. If the cooling system seems to be in good order after you check it and do the maintenance work in this chapter, investigate these possibilities :
- Late timing : If you haven’t tuned and timed your engine recently, late timing may be causing it to overheat by making the spark plugs fire the fuel/air mixture after the piston moves back down from the top of its stroke. When the spark plugs fire too late to allow all the gases to burn properly, more heat burdens your cooling system. Late timing alone doesn’t cause a car to overheat by more than a few degrees, but coupled with other problems, it can bring the engine temperature to a critical point. The remedy is simple: Just check your timing and adjust it.