Monthly Archives for December 2011

Hydraulic Systems Advantages

A hydraulic system has four major advantages, which makes it quite efficient in transmitting power. 1. Ease and accuracy of control: By the use of simple levers and push buttons, the operator of a hydraulic system can easily start, stop, … Continue reading

02. December 2011 by and
Categories: Hydraulic Circuit Design | Tags: | Leave a comment

Hydraulic Systems Components

Virtually, all-hydraulic circuits are essentially the same regardless of the application. There are six basic components required for setting up a hydraulic system: 1. A reservoir to hold the liquid (usually hydraulic oil) 2. A pump to force the liquid … Continue reading

02. December 2011 by and
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Bendix Hydro Boost Brake System

This system was developed by Bendix Corporation as a solution to the typically crowded engine compartments consisting of larger vacuum units. Figure 9.3 contains a schematic of this system. The basic system consists of an open center spool valve and … Continue reading

02. December 2011 by and
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Hydraulic Power Steering

Power steering is another automotive application developed by Bendix Corporation. This is used in conjunction with a conventional type steering gear. The hydraulic power cylinder is mounted at any convenient place where it can be connected to act directly on … Continue reading

02. December 2011 by and
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Cooling Hydraulic Oil

Two types of heat exchanger are used to cool hydraulic oil: (1) shell-and-tube and (2) finned tube. The shell-and-tube (Fig. 8.1) has a series of tubes inside a closed cylinder. The oil flows through the small tubes, and the fluid … Continue reading

01. December 2011 by and
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Hydraulic Contamination Control

There are three types of failure in a fluid power system. 1. Degradation. The performance of the component degrades over time as surfaces wear, clearances increase, and leakage increases. 2. Intermittent. Valves stick and then break loose such that operation … Continue reading

01. December 2011 by and
Categories: Contamination and Temperature | Tags: | Leave a comment

Hydraulic Contamination Sources

There are four sources of contamination in hydraulic fluid. 1. Built-in contamination. This is contaminate that was left in the system when it was assembled. It can range from a piece of teflon tape to a piece of welding slag. … Continue reading

01. December 2011 by and
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Hydraulic Temperature Switch

A temperature switch is an instrument that automatically senses a change in temperature and opens or closes an electrical switching element when a predetermined temperature level is reached. Figure 6.47 is an illustration of a common type of temperature switch … Continue reading

01. December 2011 by and
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Hydraulic Flowmeters

Flowmeters are used to measure flow in a hydraulic circuit. As shown in Figure 6.49, flowmeters mainly comprise of a metering cone and a magnetic piston along with a spring, for holding the magnetic piston in the no-flow position. Flow … Continue reading

01. December 2011 by and
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Hydraulic Manifolds

Leaky fittings are a cause for concern in hydraulic circuits especially with increase in the number of connections. This is where manifolds play a very important role. Their incorporation in a hydraulic circuit helps drastically reduce the number of external … Continue reading

01. December 2011 by and
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