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Ajusta Pump.
OPERATING INSTRUCTIONS.
|Operating
Instructions| |Stroke
& Crank Arm Sizing Diagrams| | Stroke Sizing
Formula|
|Stroke Length
Adjustments | |Beam
Balancing Instructions| |Balancing
Formula|
|Anchoring
Instructions| |BPD
vs. Depth Curve| |SPM
to Stoke Ratios| |Parts Listing|
Stroke & Crank Arm Sizing Diagrams.
Diagrams 3 & 4
C = Length of crank arm.
2C = Twice the length of crank arm.
P = Fixed length of pitman arm.
S = Length of stroke.
D1 = Horizontal length of beam from fulcrum to end of horsehead.
D2 = Horizontal length of beam from fulcrum to pitman arm.
Diagram 3
will help you to visualize the following:
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Moving the carriage and the end of the beam towards the
fulcrum increases the size of the stroke.
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Moving the carriage and the end of the beam away from the
fulcrum decreases the size of the stroke.
Diagram 4 will help you to visualize the following:
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Increasing the length of the crank arm increases the size of the stroke.
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Decreasing the length of the crank arm decreases the size of the stroke.
Stroke Sizing
Formula*.
2C=S x D2
D1
C = Length of crank arm.
S = Length of stroke.
D1 = Horizontal length of beam from fulcrum to pump.
D2 = Horizontal length of beam from fulcrum to pitman arm.
Although desired settings can be determined through field experimentation, the above formula will help you to determine the approximate beam and crank arm lengths for your desired stroke. For example, Diagram 6 and the formulas show the length of stroke obtained at various D2 lengths when the crank is set at 15". Diagram 7 and the formulas show the length of the crank arm when the desired strokes are 30", 10" and 4".
*NOTE: Due to the numerous variables that can occur on location, the sizing formula may produce a stroke slightly different than what is calculated; i.e.
if S is calculated to be 30", the actual stroke could be 28".
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