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Pump Section Repair and Service

WARNING: Before proceeding, follow the Pressure Relief
Procedure outlined on Page 5. Additionally, follow all other
warnings to reduce the risk of an injection injury, injury
from moving parts or electric shock.

1. Remove Safety Plate #70 (on pg. 20).
2. Stop the sprayer at the top of its stroke so that the piston is

in its highest position. Turn off and/or unplug the sprayer.

3. Remove the bypass hose assembly #341 with a wrench and

the syphon assembly #342 by pulling up on the hose and
turn counterclockwise.

4. Tilt pump back for easy access to pump section.

Seat Service and Repair

The design of Titan's Epic Fluid Section allows access to the
inlet and outlet valves and seat without completely
disassembling the Fluid Section. It is possible that the valves
may not seat properly because of debris stuck in the inlet or
outlet seat. Follow the instructions below for access to those
areas.

5. Place a wrench on the Foot Valve #323 and unthread.
6. Clean out all debris. Examine Valve and Seat. If damaged

replace. Continue if necessary or re-install.

7. Place a 3/4" socket on the Outlet Valve Housing and Seat

#312 and remove.

8. Clean out all debris. Examine Valve and Seat. If damaged,

reverse or replace.

9. Reassemble and test unit. Should unit not perform

properly, consult the Troubleshooting Guides on pages 13
&14 of this manual or continue with the Repair and Packing
Replacement instructions below.

Service/Replacement of Upper (Outlet) Valve

10. To clean or replace upper valve, remove Valve Housing

#312 while piston assembly #315 is still attached to pump.
This will prevent the piston from rotating.

11. Remove upper valve cage #310 and Outlet Valve Seat #313

& Ball #311 Clean and inspect along with housing #312.
Replace if worn or damaged. Use fine sandpaper to
remove dried paint.

12. Reattach assemblies #309–312 to piston #308, and secure

tightly with a wrench.

Packing Replacement

13. Unscrew hose #19 (on pg. 22) from fitting #392.
14. Remove screws #306 with a 3/8" allen wrench and slide

pump section down so that the piston is clear to slide off.

15. Inspect polyethylene seal #391 on fitting after removing

pump section. Clean or Replace.

16. Remove Retainer #301 and slide piston down through pump

housing #305 by lightly tapping on top of piston assembly
#315. Clean and inspect piston for wear. Replace if
necessary.

17. Remove packings #304 and #307 from pump housing #305

and replace with a new set. Always insert packings with the
raised side facing into pump mount assembly.

18. Reattach Retainer #301 and make sure that the upper guide

#302 is cleaned and undamaged.

19. Insert pump housing items #301–#307 into a vise, leaving

enough room to slide piston through bottom of pump
housing #305.

20. Using the piston guide tool (included in repacking kit), which

slides over the top of the piston assembly #315, insert the
piston through bottom of pump housing #305 and tap lightly
with a rubber mallet on bottom of piston until inserted.

21. Align flats on piston so that it is perpendicular to housing

#305 and will line up when reattaching to connecting rod.
This can be achieved by rotating the piston by placing a
wrench on the valve housing assembly #312 and turning.

CAUTION: Never use a wrench on the piston itself. This

could cause damage to the piston and cause
leakage.

22. Slide assembled pump housing with piston assembly onto

connecting rod and secure with screws #306. Be certain
that outlet hole is facing towards pump motor.

23. Reattach hose #19 (on pg. 22) to fitting #392 Be sure that

polyethylene gasket #391 is in place.

24. Reattach lower foot valve assembly #325
25. Reattach pump syphon tube assembly #335, and rotate to

correct position.

26. Reattach pressure relief tube and syphon hose and tighten

securely.

NOTE: Repacking Kit P/N 730-401 is available. For

best results use all parts supplied in this kit.