800.922.2820 | www.NTTInc.comTraining

HYDRAULICS AND SYSTEM TROUBLESHOOTINGLearn the basic hydraulic components, how they work, and their function in a hydraulic circuit. You will be able to understand and interpret hydraulic schematics, and implement safe work practices.

The extreme flexibility of hydraulic elements can create a number of problems. Participants learn how fluids must be positively confined through the entire system and prevented from going anywhere except where we want them to go.

There is no magical way to troubleshoot a hydraulic system; it is the logical analysis of basic facts and principles. Through the hands-on hydraulic trainers you will construct, operate and troubleshoot systems using common hydraulic components.

COURSE AGENDA HYDRAULIC PRINCIPLES• Pressure and force• Advantages and disadvantages• Physicalpropertiesofliquids• Measurement and scales• Pascal’s Law• Horsepowerandtorque

HYDRAULIC PUMPS• Positive-displacementofpumps• Increasing/decreasing volume• Gear/van piston/screw pumps• Troubleshootingcavitation,entrainedair,effects

of varnish and sludge

FLOW, PRESSURE AND DIRECTIONAL CONTROL VALVES• Flowcontrols,actuatorspeed,andorifices• Hydraulic circuit/placement• Relief/sequence/counterbalancevalves• Pressure-reducing valves• 3-positiondirectionalvalvesymbols• Solenoids-controlled, pilot-operated valves• Measuring surge pressure

HYDRAULIC CYLINDERS• Singleanddoubleactingcylinders• Seals• Cylindertypesandconstruction• Flowrequiredbycylinders• Regenerativecircuit• Troubleshootingcylinders

CLASS FORMAT:Lab + classroomTheparticipantisableto“learn-by-doing”inthecourse;this knowledge can be transferred to the workplace.

STANDARD CLASS SIZE:NTTrecommendsaclassof12participantstoobtainthe best results.

NTT TO PROVIDE:• 4-days(32contacthours)ofon-siteinstruction• Textbooks and lab manuals, • Classroom consumables• Completioncertificates• Shipping, instructor fees and travel expenses

CLIENT TO PROVIDE:• Classroom,witheasyaccess,of750squarefeet

or greater• Projectionscreen,whiteboardand/orflipchart(s)• Adockfacilityoraforklifttounloadthetrainingequipment

• Apalletjacktomovethecratesaroundaftertheyhave been unloaded may also be needed

• Theequipmentshouldbeplacedinthetrainingroomfor the NTT instructor to test and set up prior to the start of training

SHIPPING:3 crates: •2crates@38”x52”x81”(1,150lbs.each)•1crate@38x58x57(750lbs.,cavitationunit)

800.922.2820 | www.NTTInc.comTraining

HYDRAULICS AND SYSTEM TROUBLESHOOTING

COURSE AGENDA, continued

HYDRAULIC MOTORS• Speedandtorque• Types and sizing of hydraulic motors• Hydraulic motors in circuits• Hydrostatictransmission• Applicationsofrotaryactuators

ACCUMULATORS• Applications,sizing,andcharging• Installationandoperatinginstructions• Gas precharge pressure

HYDRAULIC FLUIDS• Propertiesandtypesfluids• Fire-resistant/biodegradablefluids• Fluid storage and handling

FLUID CONDUCTORS• Hydraulicfluidconductors• Steel pipes and tubes• Flexible hose• Fluidvelocities• Friction/restrictionsinfluidlines

RESERVOIRS, HEAT EXCHANGERS AND FILTERS• Contaminationcontrol• Detection

TROUBLESHOOTING—BASIC REQUIREMENTS• Componentfunctionandoperation• Hydraulic symbols

PRINCIPLES OF MOTION AND FORCE• Movementandspeed—flowrate• Flow pressure

SOME GENERALIZATIONS• New vs. old systems• The major cause of failure• Diagnosticequipment

NOISY PUMPS OR CAVITATION AND AERATION• Low pressure/entrained air• Vacuum, foaming, and air leaks

LOW, ERRATIC OR NO PRESSURE• Wrongrotationofpump• Relief valve or compensator• Low reservoir level

CONTAMINATION IN VALVES NO MOVEMENT OF ACTUATOR• Malfunctioningpumps• Lack of pilot pressure• Incorrectplumbingconnections• Solenoid problems• Wrong temperature or motor speed

NOISE CONTROL• Lowernoisegeneration• Isolatingnoise

CYLINDER & CIRCUIT PROBLEMS• Erraticorjerkmotion• Blown rod seals, cylinders, or plumbing• Cylinderdrift

SOLENOID FAILURE• Coil burnout• Mechanicaldestruction• Life expectancy

LEAKAGE CONTROL• Flaretypefittings• Straight and tapered threads• O-ring failures

TROUBLESHOOTING GUIDE• Test set up and procedures• Fixed displacement motor• Variable displacement pump

800.922.2820 | www.NTTInc.comTraining

HYDRAULICS AND SYSTEM TROUBLESHOOTING

COURSE AGENDA, continued

HANDS-ON LAB EXERCISES• NTTtrainerfamiliarization• Flow control types• Meter-inflowcontrol• Meter-outflowcontrol• Bleed-offflowcontrol• Two-speed control• Sequencingcircuit• Sequencingwithflowcontrol• Remotepilotofsequencevalve• Pressurereducingwithsequencing• Pilot-operated relief• Regeneration• Differentialvolume

UsingNTT’sspeciallydevelopedhands-ontrainingstations,participantsbuildandoperatenofewerthan14differentcircuits.

Participantsseefirst-handhowproblemssuchascavitation,aeration,erraticpressure,lossofpressureorflowshortencomponentlifeandinfluencesystemfailures.