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Hydraulic Pump Selection Guide

Hydraulic Pump Selection Guide

Product catalog summary

Hydraulic Pump Selection Guide Overview
This guide offers detailed information on selecting hydraulic-driven centrifugal pumps for agricultural tractors, including specifications, performance tips, and selection criteria based on tractor models and hydraulic systems.

Model 9303C-HM4C Cutaway View
A cutaway view of the Model 9303C-HM4C pump is provided, highlighting key components such as the outlet port, stainless steel wear ring, and inlet port, aiding in understanding the pump's construction.

Performance Tips

Minimize Hydraulic Motor Back Pressure: Reduce back pressure by using a free dump return port, increasing quick coupler size, and ensuring proper return hose diameter.
Hydraulic Filter Maintenance: Regular filter changes prevent pressure drops and maintain performance.
Hydraulic Test Kit Usage: Hypro's test kit measures hydraulic back pressure, system pressure, and flow for diagnostics.
Bypass Screw Adjustment: Adjust the bypass screw for Open Center systems as per the manual; Closed Center systems require it fully turned in.
On/Off Operation: Use rate controllers for nozzle control to prevent seal damage from trapped pressure.

Pump Selection
Hypro offers pumps in various sizes and materials, including Polypropylene, Cast Iron, and 316 Stainless Steel, with a chart for selecting pumps based on hydraulic flow ranges and system types.

Hydraulic System Types

Constant Displacement Pumps: Provide constant flow, with variation achieved by changing engine speed.
Variable Displacement Pumps: Adjust flow based on demand, maintaining constant pressure and flow.

Hydraulic Controls and System Types
Details on Open Center and Closed Center systems, including operation and correct spool valve positions to prevent motor damage.

Hydraulic Plumbing Considerations
Proper hydraulic plumbing is crucial to avoid increased return circuit pressure, affecting pump performance.

Overview: This document details hydraulic systems and specifications for tractor models from manufacturers like WILDCAT, STEIGER, VALTRA, VERSATILE, and WHITE, including system pressure, flow rates, and pump model recommendations.

Key Sections:

Specifications: Lists tractor models with hydraulic system types, maximum system pressure, and flow rates, recommending specific HYPRO pump models based on performance needs.
Code Key: Provides a code key for interpreting recommendations and explains the Load Sensing (LS) hydraulic system, advising a priority circuit for hydraulic motors.
Manufacturer-Specific Notes: Includes notes on auxiliary coolers for continuous duty equipment, flow control adjustability, and special plumbing instructions for certain models.
Contact Information: Concludes with Hypro technical support and customer service contact details for further assistance.

Critical Information: Emphasizes the importance of correct hydraulic system setup for optimal performance and avoiding equipment damage, highlighting the necessity of auxiliary coolers for continuous duty applications and specific instructions for unique model requirements.

Catalog excerpts

Outlet Port Stainless Steel Wear RingInlet Port Drain/Vent PlugPump CasingMounting Flange Ball BearingShaft SealMain Bearings GerotorPressure Port AdapterO-ring SealMotor End PlateGerotor HousingMotor BodyShaftO-ring Seal Mechanical Seal Tank Port Adapter >

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There are many tractors with a variety ofhydraulic capabilities.How you get the most use of your tractors power depends on your skill as a good operator and manager.Here are some tips to follow that will lead you to greater pump performance, and in the long run, will add to your success. > High hydraulic motor back pressure can rob performance from your Hypro pump.As you can see in the chartbelow, for the same spray pressure, there is a 40 gallon per minute loss in performance due to excessively high hydraulic back pressure in the return line of the spray pumpҒs hydraulic hose.Those 40 gallons...

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By reducing your motors hydraulic back pressure, theamount of available energy to the hydraulic motor increases and that energy can be used for work.Here are some of the most common sources of high hydraulic motor back pressure. 1.Tractor Return Valve Block A free dump return port is the best way to minimizereturn back pressure.This Free dump free dump return ports help toreduce the back pressure, but can vary for tractor models.A realistic back pressure goal is 50 Җ 150 PSI. return, bypassesthe tractor valve block spool and greatly reduces hydraulic back pressure. 2.Quick Coupler Size 3.Return...

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The best way to know your hydraulic oil backpressure is to measure it.Hypro provides a Hydraulic Test Kit (PN:3430-0650) that can easily be inserted into the hydraulic circuit of the Hypro spray pump.You can instantly learn what your hydraulic back pressure is as well as the tractors system pressure and hydraulic flow.This is a great diagnostic tool for those who need to improve their performance.Ask for this test kit at your sprayer dealer. Rule #2 Know Where to Set the Bypass Screw > This Hypro hydraulic motor feature is intended solelyfor Open Center hydraulic systems.Follow directions for...

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The Raise position is not recommended for OnӔbecause the valve must travel through the Neutralposition to get to Float.System Types: Hydraulic Plumbing: Do Not Remove Check Valve. There are three types of hydraulic systems used on tractors.One utilizes a constant displacement pump and iscalled an Open Center System because of the spool valve employed.The other two use a variable displacement pump and are known as Closed Center (Pressure Compensated) Systems or Closed Center Load Sensing Systems based on the type of spool valve and system operation.Open Center systems, while having constant displacement...

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(1) Best recommendation for high performance applications. (2) Recommended for standard applications. (3) Will also work. (LS) Load Sensing Hydraulic System.On all closed center, load sensinghydraulic systems, run hydraulic motor on priority circuit. >

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(1) Best recommendation for high performance applications. (2) Recommended for standard applications. (3) Will also work. > (LS) Load Sensing Hydraulic System.On all closed center, load sensinghydraulic systems, run hydraulic motor on priority circuit. >

Open the catalog to page 34

Hydraulic Pump Selection Guide

Hydraulic Pump Selection Guide

Catalog excerpts

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