yale forklift hydraulic pump price

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Yale Hydraulic Hand Pumps have an all steel construction for durable use and high efficiency pumping action. The hand pumps include hydraulic oil, carrying handle, reservoir ventilation plug and many more features. The HPS range is single acting cylinders and the HPH range is all double acting cylinders.

Hand pumps are easy to use and operate independently of any external energy source. They are designed for a maximum 700 bar system pressure and will allow each hydraulic cylinder to utilise its maximum capacity. The two-stage system reduces pumping time. Stage 1 allows rapid piston travel under no load or light load conditions. The pump automatically switches to stage 2 when the piston is loaded and a higher force is required from the top.

The hand pump is an all-steel construction designed for rough use and has a high-efficiency pumping action. The handle can be locked for easy carrying. The large and easy-to-control return valve allows the operator to precisely control the return stroke. Other standard features include a large and easy-to-control hand wheel, air bleeding and oil filling plug, large support feet for stability, tilted tank to increase usable oil volume and ergonomic handle grip.

Hydraulic Pumpsare highly utilized parts in a forklift. For example, hydraulic pumps can be found in the power steering system, braking system, suspension system, and gear and motor system. The focus of the following article refers to the hydraulic pumps in gear and motor systems.

Forklift Hydraulic Pumps found in the gear and motor systems provide the flow required to transmit power to a hydraulic actuator from a prime mover. There are two types of hydraulic pumps; centrifugal and positive displacement. Centrifugal involves the flow of the fluid transfer, which depends on the outlet pressure. Whereas, the positive displacement depends independently on pressure. The hydraulic flow is created when the prime mover drives the pump rotating group, which forces fluids out of the pump outlet. When the fluid is forced out, a vacuum force is made at the pump inlet and its natural pressure pushes the fluids from the reservoir into the pump.

Positive displacement pumps come in two forms: fixed displacement and variable displacement. Fixed displacement (hydrostatic) pumps have the flow varying only on the shaft speed. Its benefit is that it performs well, creating a constant flow and pressure. Variable displacement (hydrodynamic) pumps can have flow varying on any shaft speeds provided. Though variable displacement is the more expensive alternative of the two, it is more energy efficient. Also, it performs well for variable flow or pressure applications.

A common hydraulic pump problem is one with bad gears. The bad gear problem may occur for various reasons such as wear, high temperature of the hydraulic fluid, fluid leaks and contamination, and aeration which occurs due to air pockets. Checking the hydraulic pump gears is as follows:

Hydraulic pumps can be found inside or outside of the engine. To dissemble the pump, the bolts has to be unscrewed. They are found on the side for the outside pumps or the bottom for the inside pumps.

The clearance should be measured between the gears and the pump’s housing cover with a straightedge. Generally the clearance is between .001 to .004 inches. When the measurement exceeds .005 inches, the gears should be replaced immediately. Also, ensure that the gears are absolutely installed into the pump and that their measurements are consistent.

The gear teeth clearance to the pump body should be checked and ensured that the teeth length is consistent. Generally the clearance is between .001 to .005 inches. Check the specifications.

All components should be cleaned prior to reassembling the pump. The gears and the pump housing should be cleaned and blow dried. Petroleum jelly can be applied to all inner components.

If the findings from the above steps concludes that the components are damaged are worn out, they have to be replaced. Solid Lift Parts Inc. provide hydraulic pump components for all makes and models for inexpensive prices. The hydraulic pump and its components should be replaced by a professional mechanic with expertise in hydraulic pump replacement.