If we want high volume, and low pressure, what type of pump would we use?
What is the most common constant displacement type pump?
Hydraulic hand pumps can be?
Single or Double acting
In a hydraulic system with a constant displacement pump, what must we have to prevent system damage?
In the gear type pump, how does the fluid flow through the pump?
The fluid is trapped between the gear teeth and the wall body of the pump, where it is moved to the outlet side of the pump
What is the function of a pump in a hydraulic system?
Move fluid through the system
In the Gerotor pump, the driven rotor has how many more teeth than the drive gear?
The variable displacement pump utilizes what to lengthen or shorten the effective stroke of the piston?
Similar to a basic electrical circuit, in a basic hydraulic system, the fluid flows from the pump to______, ______, ______, ______?
Flowmeter, pressure gauge, valve (restrictor), reservoir.
How do we cool a Variable displacement pump??
Bypass some fluid back to the reservoir
Is the pump given for this work sheet a: (Gear Type Pump) Constant displacement Or Variable displacement
Constant displacement type
A gear type pump operates by allowing the fluid to go from the inlet: -Through the center of the teeth between the 2 gears and to the outlet. Or -Between the teeth and the housing where meshing of the 2 gears drives the fluid to the outlet
Between the teeth and the housing where meshing of the 2 gears drives the fluid to the outlet
In most cases, when installing a gear type pump, is it necessary to coat the drive spline and the engine drive spline with a good approved lubricant?
What is the purpose of the weak relief valve used to control case pressure located in the gear pump cover? -Ensures the lubricating fluid always goes to the outlet side of the pump or -Prevents air from entering into the pump body and hydraulic system though the drive gear shaft, should the seal fail
-Prevents air from entering into the pump body and hydraulic system though the drive gear shaft, should the seal fail
Why do the floating bronze bearings have an “O” ring under the flange? (Gear Type Pump) -To allow pump out put pressure to push the bronze bushing against the side walls of the gears and create a better seal at high system pressures. Or -Allows the pump to rotate in either direction and still have the fluid flow in the same at the inlet and outlet.
To allow pump out put pressure to push the bronze bushing against the side walls of the gears and create a better seal at high system pressures.
Where does the lubricating pressure originate in the gear type pump?
Between the pump gear teeth as they mesh together.
In the gear type pump a minimum side clearance between the gears and the body bearing flange is reduced by pressure from the discharge port and the force is applied against the gear by the floating bearing, this is called:
When installing the gear type pump, at what location should the seal drain line be positioned?
At the bottom or lowest 1/8” plug fitting and run the line into the slip stream
On the model gerotor pump that you have, how many teeth does the spur driving gear have?
On the model gerotor pump, how many teeth does the internal gear rotor have?
Which way does the model you have (gerotor pump) rotate viewed from the top of the pump or inlet outlet side
Left hand (ccw)
When considering the relief valve, does direction of rotation matter in the model gerotor pump?
Considering the 4 vertical oil lines in the case lining of the pump, from where does the lubricating oil pressure originate? (Gerotor Pump)
from the spur driving gear and is pushed internally through the gear rotor
What purpose does the 1/10” hole in the relief valve have? (Gerotor Pump)
allows fluid to flow from the outlet to the inlet
Strato Power 67V Series Pump. What function does the check valves located in the pressure annulus have?
allow the pump pistons to create a low pressure on the intake stroke
Strato Power 67V. Is the piston stroke of this pump constant or variable?
Strato Power 67V. Is the pump a: variable volume type or constant volume type
variable volume type
Strato Power 67V. When does the spring guide shut off the inlet flow of fluid by closing completely? -when fluid goes directly to the reservoir from the pump or -does not shut off the fluid flow going through the pump and never closes completely
does not shut off the fluid flow going through the pump and never closes completely
Strato Power 67V. What prevents the discharge pressure from flowing to the inlet side of the pump when pump rotation stops?
Strato Power 67V. What is the primary purpose of the pilot piston? -to move the valve piston against the pressure control spring and also allow fluid to go to the reservoir during a no flow condition or -close off the inlet flow and reduce flow into the pump causing a non-flow condition
to move the valve piston against the pressure control spring and also allow fluid to go to the reservoir during a no flow condition