This guide explains how to assemble the Conventional Pumping Unit model.

Read through the full instructions before starting assembly.

• Main base frame
• Reducer base
• Gearbox
• Samson post
• Walking beam
• Horsehead
• Pitman arms
• Counterweights
• Motor assembly
• Rubber band belt

• Small screwdriver (optional)
• Needle nose pliers (optional)
• Super glue (optional)

Place the reducer base into the mounting slot on the main frame.

Make sure it sits flat and fully seated before continuing.

Place the gearbox straight down onto the reducer base.

Once it is seated, push it straight to the right until it locks into position.

Insert the Samson post vertically into the mounting location on the frame.

Ensure it is straight and fully seated.

Install the walking beam onto the pivot point at the top of the Samson post.

Check that the beam can move freely after installation.

Install the horsehead onto the front end of the walking beam.

Press firmly and evenly until fully seated.

Attach the pitman arms between the gearbox crank and the walking beam.

These parts transfer rotational motion into the pumping action.

Attach the counterweights to the crank assembly.

Make sure they rotate without contacting nearby parts.

Mount the motor assembly and place the rubber band belt over the motor pulley and gearbox pulley.

Check that the belt is aligned and properly tensioned.

Before operating the unit, confirm the following:

• All parts are fully seated
• The walking beam moves freely
• The pitman arms are aligned
• The belt is properly installed
• No moving part rubs against the frame

Once powered, the motor drives the gearbox, which moves the pitman arms and produces the classic nodding motion of a conventional pumping unit.

• Verify it is sitting fully down on the reducer base
• Slide it straight to the right
• Do not twist during installation

• Check pitman arm alignment
• Check that the Samson post is fully seated
• Confirm the beam pivot is not binding

• Recheck pulley alignment
• Verify the rubber band is seated correctly
• Replace the band if it is too loose

• Height: approximately 29 in
• Length: approximately 38.5 in
• Width: approximately 6.5 in
• Material: Super PLA+

• 3D Printing
• Future Print Projects
• Conventional Pumping Unit Overview