Pulsafeeder PulsaPro 900 EN User Manual

Page 40

1. Apply PULSAlube Universal or Ultra hydraulic oil to all the piston assembly components. No

matter which piston size you have.

For 4 inch pistons and larger please follow these instructions:

1.1

Slide the smaller of the 2 o-rings over the threaded end of the cross head.

1.2

Install the spacer onto the threaded end of the cross head.

1.3

Install the piston cup with the outer lip facing away from the cross head.

1.4

Install the larger o-ring into the groove on the outside diameter of the Expander.

1.5

Install the expander onto threaded end of the cross head.

1.6

Assure all components slide back onto the threaded end of the cross head until they
bottom out (refer to Figure 21).

1.7

Please confirm that the expander with the o-ring on the outside diameter lies flat
inside the piston cup when fully pushed rearward. Proceed to Step 2 of this section.

For 3 inch pistons and smaller please follow these instructions:

1.1 Slide the smaller of the 2 o-rings over the threaded end of the cross head.

1.2 Install the seal retainer onto the threaded end of the cross head.

1.3 Install the seal onto the seal retainer. Make sure the seal is seated properly all the way

around the retainer.

1.4 Install the unitized piston.

1.5 Assure all components slide back onto the threaded end of the cross head until they

bottom out (refer to Figure 21).

1.6 Please double check the seal to assure it is seated properly to the seal retainer. Proceed

to Step 2 of this section.

2. Install the flat washer and lock washer onto the end of the threaded shaft.

3. Apply Loctite® 242 (™ Henkel Corporation) removable anaerobic thread locking compound to

the threads on the threaded end of the Cross head.

4. Hand tighten the Piston retaining nut onto the threaded end of the cross head.

5. Torque the nut to 140 foot-pounds. This will draw the piston onto the end of the cross head and

cause it to bottom out on the shoulder.

T IS IMPORTANT TO USE THE CORRECT THREAD LOCKING COMPOUND AND TORQUE

THE PISTON RETAINING NUT

AILURE TO DO SO CAN RESULT IN CATASTROPHIC

FAILURE OF THE PISTON ASSEMBLY AND RESULT IN DAMAGE THAT IS NOT COVERED

UNDER WARRANTY

6. Replace the reagent head and diaphragm as described in Section 7.1, Wet End Removal,

Inspection and Reinstallation.

7. Fill the pump head with PULSAlube Universal or Ultra and prime the pump head as

described in Section 6 – Equipment Startup.