1. Predetermine stroke length and crank length - D1, D2 and W2, see Operating Instructions.
   
   

2. Set base unit on pad and insert horse head beam in place ( have D1 predetermined).
   Slide base up to push rod and:
         A. Determine initial location for Ajusta Pump on the pad;
         B. Determine if the height of pad is sufficient in  relation to the stuffing box or the polish rod liner.  
   
   TIP: Use railroad ties if the pad cannot be raised.
   
   

3. Attach the transmission to base mount.
   
   

4. Attach the fly wheel to the motor - DO NOT permanently secure the fly wheel, sometimes the motor has to be removed when anchoring the unit after assembly is completed.
   
   

5. Place lower crank arm on the transmission.
   
   

6. Place the middle beam in position  - DO NOT place the weight balancing beam in position yet. 
   
   

7. Attach the pitman arm to beam.
   
   

8. Attach the upper crank arm to pitman arm.
   
   

9. Attach both crank arms together.
   
   TIP: using the fly wheel, rotate the lower crank arm until it is pointed up.  Then attach the crank arms.
   
   NOTE: When the crank arm is in the 6:00 o'clock position,  the beam should be extended such that the upper pitman arm bearing is directly above the transmission shaft (see Diagram #2 of Operating instructions).
   
   

10. Rotate the fly wheel until one complete stroke cycle is completed. If no problems occur, once again rotate the fly wheel to check the size of the desired stroke.
    
    

11. Adjust the stroke size if necessary. Check the adjusted stroke size.
    
    

12. Place the hanging bar and cable on the horsehead and polish rod.
    
    

13. Check alignment of the horse to polish rod. Adjust if necessary.
    
    

14. Put the weight balance beam in place.
    
    

15. Add counter balance weights (pre-calculated).
    
    

16. Rotate the  fly wheel by hand, noting the pressure applied on down stroke and the up stroke.  Balance weights accordingly, until you feel the pressure applied to the flywheel is approximately the same on the up stroke and down stroke.
    
    

17. Wire the motor and amp meter (amp meter is an optional purchase).
    
    

18. Secure the fly wheel permanently.
    
    NOTE: Use the lock tight on Allen screw and shaft. The recessed side of the flywheel should face the motor.
    
    

19. Double check to confirm all the bolts are tightened.
    
    

20. Place the safety bolts in place on (Model 4000):
             A. Balance beam.
             B. Horse head beam.
    
    

21. Anchor unit to the base mount, as shown in the Operating Instructions.
    
    

22. Start Motor.
    
    

23. Check the balance of the beam by use of an amp meter -  see the motor warranty card.
    
    NOTE: This step is essential to validate warranty for motor!
    
    

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After Initial Installation.

• When adjusting the stroke length, and before restarting Ajusta Pump, new calculations should be done to confirm that the counter balance weights are correct. Use the formula, W1 x D1 = W2 x D2 
  (see Operating Instructions for details  - or call your Ajusta Pump service representative at 800 - 353 -7540).
  
  

• Failure to adjust the counter balance weights could result in damage to either motor or transmission.