4. Clean out any debris and examine the valve housing and seat. If the seat is damaged, reverse or replace the seat.
5. Remove, clean, and inspect the upper cage and upper ball. Replace if they are worn or damaged.
6. Reassemble the valves by reversing the steps above.
Repacking the Fluid Section
NOTE:The factory-installed packings are black in color. The replacement packings in the packing replacement kit are white.
1. Remove the foot valve and outlet valve assemblies using the steps in the ¡°Servicing the V alves¡± procedure above.
2. Using 3/8¡± a hex wrench, loosen and remove the two pump block mounting screws.
3. Pull the pump block down approximately 1/2¡± from the pump housing.
4. Slide the pump block and piston rod forward until the piston rod is out of the T-slot on the connecting rod.
5. Slide the piston rod out through the bottom of the pump block
6. Loosen and remove the retainer nut and piston guide from the pump block.
7. Remove the upper and lower packings from the pump block.
8. Clean the pump block and install the new upper and lower packings. Refer to the illustration below for proper packing orientation.
9. Inspect the piston rod for wear and replace if necessary.
10. Reassemble the outlet valve assembly into the piston rod. Tighten the outlet valve housing with a wrench until secure.
NOTE: Use the T-slot on the connecting rod to hold the piston rod in position while securing the
outlet valve housing.
Never use a wrench on the piston itself. This could cause damage to the piston and cause leakage.
11. Insert the piston guide into the retainer nut. Thread the retainer nut into the pump block until it is hand tight.
12. Slide the piston guide tool (included in the repacking kit) over the top of the piston rod and insert the piston rod through the
bottom of the pump block. Using a rubber mallet, tap the bottom of the piston rod lightly until the piston rod is in position in the
pump block.
NOTE:Coat the piston guide tool and the piston rod with grease before inserting them into the pump block.
13. Using a wrench, tighten the retainer nut securely. 14.Slide the top of the piston rod into the T-slot on the connecting rod.
15. Position the pump block underneath the pump housing and push up until it rests against the pump housing.
Make sure the transducer is aligned properly with the hole in the pump block during reassembly.
Improper alignment may cause damage to the transducer gasket.
16. Thread the pump block mounting screws through the pump block and into the pump housing. Tighten securely.
17. Reassemble the foot valve assembly into the pump block.
18. Insert the elbow on the suction set into the bottom of the foot valve. Position the retaining clip into the foot valve to secure the
suction set assembly.
19. Thread the return hose into the pump block and tighten securely.
20. Place the front cover on the pump housing and secure in position using the four front cover screws.
21. Turn on the sprayer by following the procedure in the ¡°Operation¡± section of this manual and check for leaks.
NOTE:Repacking kit is available. For best results use all parts supplied in this kit.
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Italia Star Com Due S.R.L.
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004/021.433.03.27
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