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S ta te U n i v e rsir y o f N ew \_ 'o rkC olleg e of A gricu ltu re and T ' c c l l I 1 0 J O g ) "
Coble~kil]~ - J e \ . \ ' YorkAGEN ~70 -BASIC H~RAULICSName J O N : ( \ h 9 ! \ l y U \ f t . -
LABORATORY #2 ()Lab XO'1 Scor30;3
Pascal's Theory & the Flow of Fluid
Large Blue Trainer1. Refer to circuit drawing "Schematic # 1" and construct. Make sure all quick
disconnect hoses are locked in as to permit flow from one component to the next.The isolation valve located before the supply manifold should be opened as to allowfluid flow to the circuit the student constructed. Back off the main relief valve(Counter Clockwise) completely and start the electric motor. Fluid is now circulatingfrom the pump through the manifold to the directional control valve. Withoutoperating the control valve answer the following questions
A. What is the pressure reading in the system using gauge" A" under theseconditions? .~OOh';
B. Increase the relief valve until gauge A reads 350 psi. Does the gauge read350psi?
C. What is the flow reading in GPM under these conditions?d e J P M .D. What type of-system is this? Open __ or closed ~ ... Provide three logical reasons
that support your answer. (3 pts)1. No R e ! 1 . A i,\'J vn -Flo~\.- v . . . . .iII~2 . b l!iv Se A f~ ~ ' ) ' 1 ' 5 " : Pt05x,f-< .3. (,hel!'!~c 5
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u . . . jifl 1 . J ~~ : : - .. .~ "~j, .;) 1 1 0 1 . > ' I e " , C c ti ' : ~ b e . c . kf,,~r 1o;:':"fl.,.4. Put the following list of materials in the order of least compressible to mostcompressible as if the material was in a container being pressurized; wood, iron, .hric];coal.water, solder, or cotton. (7 pts.)1 i.(* ~ fv v o . : :2 Sop!'3.' ~ ':)"A . e r4. ~ 13(,(-~5 . tJ
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6. The illustration below is an example of how to remove a frozen bearing. (3 pts.)Are the tolerances between the piston and the bushing inner diameter of muchimportance? ./ Yes, __ No. Would this method work if the piston diameterbecame smaller?
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Large Blue Trainer against windowsObjective: To prove Pascal's LawSteps (refer to schematic on next page) Set up system Open isolation valve Turn on unit Close needle valve Adjust relief valve to 400 psi Adjust needle valve for slow extension of cylinders Record the pressure of the gages at the valve positions listed in the chart Turn unit off Close isolation valve
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6. Fill in chart (10 pts)POSITION GAGE A GAGESV a lv e c en te re d ~ ~~P~'Sm all c y lin d er e x te n din g
\ ()D f:ij 1 o C / P ' t ,Sm all c y lin d er e x te n de d I ~0f'.' L'10D . P . > .'>\L arg e c y lin d er e x te n din g ~fj teo ' \ ~ C > \ , ~60 p,L arg e c y lin d er e x te n de d i1L\ r-. " '" i100 r . ,7. W hich cylinder extends first and w hy? (2 pts)
~ 5rN J \ f ~.. ~- I? 'x \ \ r. L "d_._,,', '1If\Q.Rf ......'Tel \&..,_9. N ow rem ove spring on large Cylinder. Under slowextension w hich cylinder m oves first? W hy? "A sk theinstructor if you are not sure."~ Bo~ C '- ! ) ,\~ J-tI\ e ) . < : . \ e r - k ~
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