• John Deere Crawler 755B Torque Values (Inches)
    John Deere Crawler 755B Torque Values (Inches)
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    Hello Today we will be discussing John Deere Crawler 755B Inch Bolt & Cap Screw Torque Values. The torque values listed on the chart are general use only. Always, check for tightness periodically. And use the appropriate fasteners. If you use lower grade, then it will not last as long. and use the right lubricant…

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  • Sundstrand Sauer Spherical Roller Bearings
    Sundstrand Sauer Spherical Roller Bearings
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    The discussion today is Bearings. There are many, many types. So we hope you find this section informative. Sundstrand Sauer Spherical Roller Bearings The spherical bearing, due to the number, size and sharper of the rollers, and the accuracy with which they are guided, has excellence capacity. Since the bearing is inherently self aligning, angular…

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  • Sundstrand Sauer Series 40 M46 Model Code
    Sundstrand Sauer Series 40 M46 Model Code
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    Today we will be discussing what the Tag on your unit means and why it is very important to have when ordering parts, having it rebuilt or if just need to have a replacement. Without the correct numbers off the tag, it is hard to to understand what you need to fix your unit. So…

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  • Fluid Recommendations
    Fluid Recommendations
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    We hope this section on Hydraulic Fluids helps with concerns on the correct fluids to put in your units.   Hydraulic fluids used for your units should be of the highest quality to ensure the best performance for equipment to run properly Fluid Characteristics Seal Conditioning Anti – Foam Anti – Corrosion Anti – Wear…

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  • Hydraulic Pump Differential Unloading Relief Valve
    Hydraulic Pump Differential Unloading Relief Valve
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    Today’s topic is Differential Unloading Relief Valve: When the accumulator is charged, the piston is forced toward the pilot dart and forces the pilot dart completely off the seat. Thus in effect releases the main spool spring chamber of pilot pressure. The relief valve is vented. The spool moves up and allows flow to go…

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  • Manual Displacement Control
    Manual Displacement Control
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    Topic today discusses Manual Displacement Control Before dis assembly, note the position of the control handle and neutral bracket as either :up’ or “down”. Remove the screw and washer or flange head screw retaining the neural bracket to the housing using a 7/16″ or 3/8″ wrench. The spool (with neutral bracket, neutral spring ,control handle…

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  • How the Flow on a Control Valve Works
    How the Flow on a Control Valve Works
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    The discussion today is about how control valves work:   All flow control valve, when properly used, always reduces the flow rate from a pump to an actuator. Consists of: A normal flow control valve consists of a valve body and movable part. The movable part in our example is a tapered nose rod which…

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  • Coolers on Hydraulic Systems
    Coolers on Hydraulic Systems
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    Today’s discussion is about Hydraulic/Hydrostatic Oil Coolers: Heat is inevitable in the best of hydraulic designs and will turn some of it’s input horsepower into heat. And when reservoirs are incapable of dispersing all the heat, a cooler is used to help out. Coolers are divided into two groups, air coolers and water coolers. Air…

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  • Meter in Circuitry
    Meter in Circuitry
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    Today we would like to talk about Relief Valve Settings Meter in Circuitry – speed controlled extentions In the circuit illustrated, the restrictor type pressure compensated flow control valve is set for a 3 GPM. Relief valve setting is 500 PSI. Work load pressure is 200 PSI. The spring biasing the compensator spool has value…

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  • How a Pilot Operated Check Valve Works
    How a Pilot Operated Check Valve Works
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    Today we will be talking about Hydraulic Check Valves   A pilot operated check valve allows free flow from it’s inlet port to its outlet port just as ordinary check valve. fluid flow attempting to pass through the valve from outlet to inlet port will force the popped on its seat. Flow through the valve…

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