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Harley Davidson oil pumps are two-sided, gear-type, positive-displacement pumps. The oil pump drive shaft is driven by the cam gear-train which passes through the case and into the back of the oil pump body. Two sets of gears are keyed to the drive shaft: a thick set and a thin set. The thin set supplies high-volume, low-pressure oil to the engine’s oil system. The thick set, or return set, draws oil that is collected by the breather valve and forces it through the oil filter and back into the oil tank.

Locate the drive key slot in the drive shaft close to where it exits the case. Insert a key into the slot and insure that it nests fully in the groove evenly without cocking. Slide the thin drive gear onto this shaft and engage the drive gear key into its slot on the gear.

Place the thin driven gear onto its mounting stud on the backside of the pump body and hold it in place. Place the new inner pump gasket onto the locating studs on the case and slide the pump body onto the drive shaft. Rotate the driven gear until the drive and driven gears nest together, allowing the pump body to slide up tightly against the case.

Insert a key into the drive shaft where it exits the front of the pump body. Slide the thick drive gear onto the shaft and engage the drive gear key onto its slot on the gear. Slide the thick driven gear onto its mounting stud and rotate the gear until it nests with the thick drive gear

Place the pump cover gasket onto the locating studs. Slide the pump cover onto the locating studs and install the cover bolts finger-tight. Tighten the cover bolts to factory spec and in the approved pattern set by the manufacturer. Install the oil return line onto the spigot on top of the pump and install a new clamp with the factory crimping tool.

Propeller pumps are used for low lift, high flow rate conditions. They come in two types, axial flow and mixed flow. The difference between the two is the type of impeller. The axial flow pump uses an impeller that looks like a common boat motor screw and is essentially a very low head pump. A single-stage propeller pump typically will lift water no more than 20 feet. By adding another stage, heads from 30 to 40 feet are obtainable. The mixed-flow pump uses either semi-open or closed impellers similar to turbine pumps.

In permanent installations, propeller pumps are mounted vertically as shown in Figure 9. For portable pumping platforms, they are mounted on trailers or they are mounted on pontoons for use as floating intakes. Portable propeller pumps are commonly mounted in almost horizontal positions (low angles) to allow them to pump into pipelines easily as well as to be backed into a water source. Portable propeller pumps are commonly powered by the power-take-off (PTO) on tractors. On many farms, propeller pumps are used to pump out waste storage lagoons.

Power requirements of the propeller pump increase directly with the TDH so adequate power must be provided to drive the pump at maximum lift. Propeller pumps are not suitable under conditions where it is necessary to throttle the discharge to reduce the flow rate. It is important to accurately determine the maximum TDH against which this type of pump will operate.

Propeller pumps are not suitable for suction lift. The impeller must be submerged and the pump operated at the proper submergence depth. The depth of submergence will vary according to various manufacturers recommendations, but generally, the greater the diameter of pump, the deeper the submergence. Following recommended submergence depths will ensure that the flow rate is not reduced due to vortices. Also, failure to observe required submergence depth may cause severe mechanical vibrations and rapid deterioration of the propeller blades.

With most of the things guides aiming for a “Do-It-Yourself” style, a lot of people prefer building things themselves, which can be used whenever required. One such example is the water wheel pump. Water wheel pumps can be used for several purposes such as grinding grain, saw wood and most importantly, pumping water.

Nowadays, it is possible to build one’s own water wheel pump with the help of some common materials such as:

* Corrugated sheet
* Flat pins
* Wooden skewer
* Scissors/box cutters
* Ruler, compass and string
* Small-sized bucket

After all of these materials have been procured, one can start with the process of building their own water wheel pump. This water wheel pump can also act as a pond filter and aerator, if desired. A water wheel pump makes use of the current of a river by pumping the water to greater heights than the height of the pump itself. The only requirement for the water wheel pump to function is to have a steady surface flow of water. However, they can do without any steep descents and waterfalls. Enough number of precautions must be taken while installing the water pump so that it can adjust its functioning to the changing current of the river.

To make the paddles of the water wheel pump, one can use the corrugated sheet, which is generally cut into 1.5-inch segments. With the help of a protractor, one can easily make two circles on the cardboard. By marking the center of the circle, one can get the position of the axle that will connect the two half-circles of the water wheel. The two halves of the water wheel can be used to make paddles of the wheel. These paddles need to be equidistant from each other at an approximate interval of 40 degrees apart. Enough precautions should be taken so that the paddle of the wheel should lie centrally on the wheel.

By making use of pins or any other gluing substance, these paddles can be attached to the water wheel pump. To test the efficiency of this water wheel pump, one can place the water wheel pump in the kitchen sink. As soon as water runs from the tap onto the wheel, it will make the wheel of the
pump spin. This is a simple step, which can help to determine whether the water wheel pump is working efficiently or not. After testing the efficiency of the water wheel pump, it can be put to use by attaching it to a small bucket with the axle.

Punching holes into an egg carton from the top, so that the string can be encircled through it, can function as a handle for the water wheel pump. The larger piece of the string can be attached to the axle, which will help us to determine the actual strength of the bucket, which can be used to
lift water using the water wheel pump. So, go ahead and experience the pleasure of using a water wheel pump that you’ve made yourself!

Wastage of water is a curse in rural India. Much of the scarcity has

been because of wrong usage, although drought and unseasonal rainfalls too have a major impact.
Now, technology may be coming to tackle this manmade crisis. Micro Technologies (India), an IT-based security solutions developer based in Navi Mumbai, has come up with a solution that claims to help farmers reduce water wastage significantly.

The company has launched a device Micro Jai-Kisan that will help farmers remotely manage the motor pumps by using a phone. Developed on the basis of GSM technology, the farmer can turn the pump on or off and also know the status of the pump by a phone call from a GSM, STD phone, or even by sending an SMS, says P Sekhar, chairman and managing director of Micro Technologies.

Farmers usually have to make multiple trips to their farms to check if there is adequate electricity to turn on the pump to water their crops. According to estimates, about 87 per cent of utilisable water is used for agriculture in India compared to the world average of 69 per cent. The flood or flow irrigation method in the country results in more than 50 per cent of water wastage. Moreover, an estimated 213 billion cubic metre out of 690 billion cubic metre of surface water is wasted each month in India.

Water leakage, pilferage and wastage amounts to half of the total flow. Industry estimates value of water and wastewater market in India at Rs 4,700 crore. Nearly 20 per cent of the farmers are dependent on electric pumps for irrigation.

Around 25 per cent of total Gram Panchayats of any state of India have pump-based drinking or irrigation water supply facilities. This device will help them in reducing water leakage, pilferage and wastage, Sekhar explains.

The manufacturers have used a very simple technology to develop the system. “When we started developing the solution, we kept in mind that the end user is a farmer who might be illiterate. So if we are developing a solution for him, it should be simple and easy to use,” says chief information officer of the company, Nisha Menon.

The company has developed two models — one functions on the basis of SMS and the other on the basis of both SMS and phone call. At present, the products are undergoing pilot tests in Maharashtra, Andhra Pradesh, Madhya Pradesh, and Bihar.

A water pump is an important part of the engine cooling system. It provides circulation of the engine coolant (antifreeze) through the cooling system (see the top picture).
A water pump pushes the coolant through the passages (water jackets) in the engine cylinder block and cylinder head and then out into the radiator. This helps to keep the engine from overheating; the hot coolant passes through the radiator where it cools down and then returns back to the engine.

A water pump is usually driven by the engine through the drive belt. Sometimes it’s driven by a timing belt. A water pump consists of the housing with the shaft rotating on the bearing pressed inside.
At the outer side there is a pulley mounted on the shaft. At the inner side there is a seal to keep the coolant from leaking out and the impeller that acts like a centrifugal pump (see the lower picture).

Water pump problems
Typical water pump problems include coolant leaks, noisy or defective bearing, damaged or corroded impeller.
Faulty water pump might cause the engine to overheat, which can result in serious engine damage. If defective, a water pump is replaced as a unit.

Is it worth to replace a water pump when a timing belt is being replaced?
Sometimes you might be suggested to replace the water pump at the same time the timing belt is being replaced. In cases when a water pump is driven by a timing belt it’s worth to do because it involves very little extra labor, plus, a water pump is subject to wear anyway. As long as the original parts are being used, I’d recommend to go for it.

The latest technology has improved the function of vacuum pumps and helped industries (such as dairy farming and medicine) keep up with the pace of a rapidly changing and evolving global market place.

Online PR News – 17-December-2009 – The Improved Functionality of Vacuum Pumps and Systems Benefitting Many Businesses.
Vacuum pumps and systems reduce the level of pressure (most often air), in a closed circuit, system or container. There are many applications for vacuum pumps and blowers (systems) that include some familiar (and some rarely thought of) situations. Some of these applications include:
• Air Conditioning and Heating- Heating and air conditioning vacuum pumps contain a vacuum pump to maintain adequate air pressure and exchange in the system.
• Surgical/Medical-Surgical Vacuum Pumps are used in a variety of medical procedures including the operating room and in dental procedures. Removal of blood and other wastes from the procedure area are one function of a surgical vacuum pump.
• Industrial Manufacturing-Industrial vacuum systems are responsible for tasks such as liquid retrieval, and air removal from packaging.
• Plastic Injection Molding Companies-Vacuum pumps are used to remove air from molds and prevent blistering of plastic manufacturing materials.
• Injection Molding Tooling
• Equipment and Machinery- Many types of industrial equipment and machinery use vacuum lines and pump systems to function properly and how intended.
• Agriculture-Milking makes great use of the vacuum pump for automated milking of cows, goats, even sheep occasionally. We would not be able to meet the demand for milk and milk products if vacuum pumps were not available for milking.
Understanding vacuum pumps and systems can be difficult. The Vacuum Pump Guide was created to help alleviate some of your confusion. Some vacuum pump systems are quite complicated and a thorough knowledge of their working parts is crucial to using them efficiently, no matter what procedure you may be completing.
Some advances that make vacuum pumps and systems perform even better are:
• Picking up of liquids.
• Ability to move very hot materials through the system
• Increased suctioning capabilities to better compact materials when packaging.
• Ability to handle explosive and caustic materials.
• The components are resistant to abrasion when manufactured with some of the newly developed materials.
The vacuum pump guide covers some other related areas:
• Specific types of vacuum pumps such as the turbo molecular pump and the liquid ring vacuum pump are detailed.
• How to locate and purchase surge vacuum pump parts both locally and on the internet are explained.
• How to perform maintenance and repair on certain vacuum pumps and systems is available at the Vacuum Pump Guide.
• Other associated industrial machinery such as injection and plastic molding is explained.
• The intricate internal workings of a vacuum pump and system help you to develop a good understanding of the process.
• Equipment for the containment of natural gas in cylinders and equipment to detect gas leaks before they cause harm or injury.
The Vacuum Pump Guide is an essential tool if you desire to learn about and comprehend the function and purpose of vacuum pumps, systems and similar equipment.

Better for Farmer and Saves Lots of Water
Tata Teleservices Limited (TTSL), a telecom company in India, has launched a new service that allows farmers to operate their irrigation pumps remotely using a SMS-capable cellphone. This is extremely useful because the alternative often is for the farmers to walk many miles to the pumps, often at night because the electricity supply is a bit more reliable then (and sometimes after walking for hours, they arrive to find out that the electricity is out).

The Business Standard writes:

Under the service, farmers will have to buy a Tata Indicom mobile connection and a mobile modem that will be attached to the starter of the pump set. After registration, the subscriber (farmer) will be provided with a unique code number. Using the mobile handset, the farmer can remotely switch on and switch off the pump set with the assigned code number. The farmer can also check the on/off status as well as the availability of power by a particular tone. “This service is exceptionally functional in order to save lot of time and energy in the regions that have erratic power supply,” Bhasin said.

The subscriber will be charged Rs 2,700 for the device and an additional amount for the handset that offers lifetime validity. The service comprises two handsets that will be provided with the bundled offer - one installed with the device while the other remains with the farmer. All the calls made to the pump by the Tata Indicom mobile will be free whereas the other calls will be charged as per the tariff plan given to the subscriber.

(2,700 Indian Rupees is about $60 US)

This is excellent for social and economic reasons, obvious (spending less time turning pumps on and off means there’s more time for more productive activities), but from an environmental point of view, this is also very important because this means that water can be used more efficiently, which means that India’s agricultural sector can become more drought resistant over time, and that more water from rivers will be left as drinking water for India’s massive population.

The heat pump is an air conditioner, which can heat and cool your house. One simple explanation is that the best heat pump will extract heat that is found in air or ground outside your home and will transfer that heat in your house in its place. Under the exact conditions it will do this considerably more cheaply than gas or oil furnace.

Consider the following questions while buying the best heat pump:

· Is heat pump a best choice — or it would be better buying furnace and central air conditioner?

· What is the perfect size that you should buy?

· What is the heat pump efficiency, also how efficient should your pump be?

· Which brand name is best for your house?

· Who must install it?

As the best heat pump can heat and cool your house, do not buy a heat pump then the central air conditioner. In addition, would you rather have a single device to buy, install as well as maintain than both central air conditioner and furnace? While the answer can be easy, you must consider some factors.

Seasonal weather in your area is probably the most significant factor in this preference. If temperature hardly ever dips under 40 degrees Fahrenheit, then you can most likely heat your house affordably with a heat pump than a furnace. However, if the temperature is colder, then you must consider having a backup heat source. Many people select a gas or an oil furnace to serve up this purpose — for reasons of price and because the furnace will keep temperatures warm when the temperature outside and inside increases.

Second, the best heat pumps are normally a little more expensive than central air conditioners of same efficiency and capacity. For instance, at one direct to consumer retailer, 1.5 ton, and 13 SEER Rheem pump retails for $100 more than an equivalent 13 SEER Rheem air conditioner. The contractors
may charge more to install the heat pump than the central air conditioner.

The third criterion to think of is longevity. As the central air conditioner is usually used only during summer months, and the best heat pumps are used during summer and winter, the lifespan of the pump is usually shorter than of central air conditioner. The maintenance costs are usually higher also, since compressor, controls as well as other components can run more months out of a year.

The water pump impeller on a boat is a crucial piece of equipment that allows the water pump to pump water through the motor to keep it cool. The impeller is a rubber turbine that, when it turns, creates a vacuum in the pump body and draws water through the pump and the rest of the motor. Replacing the impeller is a common maintenance procedure as over time it can become cracked and worn.

Screw pumps are a unique type of rotary positive displacement pump in which the flow through the pumping elements is truly axial. The liquid is carried between the screw threads on one or more rotors. The liquid is then displaced axially as the screws rotate and mesh. In other types of rotary pumps, the liquid is forced to travel circumferentially, however the screw pump has an axial flow pattern and low internal velocities.

It provides a number of advantages in many applications where liquid agitation or churning is objectionable. Screw pumps are classified as two different types: the single rotor and the multiple rotor. The multiple rotor is further divided into timed and untimed categories. Timed rotors rely on outside means for phasing the mesh of the threads and for supporting the forces acting on the rotors. Untimed rotors rely on precision and accuracy of the screw forms for proper mesh and transmission of rotation.

Advantages

1. Wide range of flows and pressures
2. Wide range of liquids and viscosities
3. Built-in variable capacity
4. High speed capability allowing freedom of driver selection
5. Low internal velocities
6. Self-priming with good suction characteristics
7. High tolerance for entrained air and other gases
8. Minimum churning or foaming
9. Low mechanical vibration, pulsation-free flow, and quiet operation
10. Rugged, compact design — easy to install and maintain
11. High tolerance to contamination in comparison with other rotary pumps

Disadvantages

1. Relatively high cost because of close tolerances and running clearances
2. Performance characteristics sensitive to viscosity change
3. High pressure capability requires long pumping elements