On the MultiFinish 440 fluid section the parts that wear are the packings (upper packing kit 704-564, lower packing 0532915), the piston rod 704-551A, the valve balls and seats, and the manifold filter 730-067. Packings leak or lose pressure; worn balls and seats cause pulsing and failure to prime.
What the fluid section does
The fluid section is the pump end of the MultiFinish 440. The motor and crankshaft in the drive assembly move a piston rod up and down, and the rod pushes coating through two valves: an inlet valve that lets material in and an outlet valve that lets it out toward the hose and gun. Packings around the rod seal it so the pump can build pressure instead of letting coating slip past.
Titan names Quad+ Packings (designed to prevent piston and seal damage) and an AutoOiler (automatic packing lubrication) as features of the 440. Titan does not give us a service interval for the packings, a lubricant specification for this machine, or a life figure, so we do not give any. Replace on symptoms and inspection, and use the manual on our manuals page for the repack procedure and the pressure relief steps.
Packings and the repack kit
Three pieces cover the packing job on the MultiFinish 440 Fluid Section Assembly diagram:
- 704-564 Upper Packing Kit (callout 3).
- 0532915 Lower Packing (callout 8).
- 704-586B Repacking Kit, listed on the same page without a callout number.
We do not list what is inside each kit, because kit contents are the manufacturer's to state and not something to guess. If you are choosing between the upper packing kit and the repacking kit, confirm the contents with our parts team on (713) 931-0006. The same page also lists two seals that sit in the fluid section stack: 704-297 Teflon O-Ring and 700-821 Teflon-Ring/Seal, which the site describes as preventing material bypass between components.
Piston rod and guides
The packings only last as long as the surface they ride on. A scored or rough piston rod will damage fresh packings quickly, so look at the rod whenever the pump is open. The diagram lists 704-551A Piston Rod, 704-560 Piston Assembly, 0509590 Piston Bushing and 700-587 Upper Piston Guide. If the rod shows scoring, replace it with the packings, not after them.
Inlet and outlet valves
Each valve is a ball that rests on a seat. When the ball or seat is worn, or when dried material holds the ball off the seat, the valve stops sealing. On any piston pump that shows up as pulsing, loss of pressure or failure to prime. These are the valve parts on the 440 diagram:
Valve parts on the 440 fluid section
Easiest check first: before you buy valve parts for a pump that will not prime or pulses, make sure the suction side and filters are clear and that nothing has dried in the valves. Then inspect the balls and seats.
Filters and the pusher valve
A partly blocked filter causes pressure loss, pulsing and spitting, and it is the easiest item on this page to check, so clean it after every job. The fluid section diagram lists the 730-067 60 Mesh Manifold Filter with its supporting parts: 704-252 Filter Housing, 702-251 Filter Screen Adapter, 730-083 Filter Spring and 757-105 Filter Support Spring.
Titan also lists a Sureflo Pusher Valve on the 440, a feature meant to release a stuck valve. The Main Assembly page lists an 805-234A Pusher Assembly; check your manual to confirm that is the part it refers to before ordering. Cleaning the sprayer after every use is the best way to keep valves from sticking in the first place.
Symptom to part
Which fluid section parts to check for common symptoms
| Symptom | Check first | Then inspect |
|---|---|---|
| Pump moves but pressure will not hold | Filters and tip | Ball and seat on both valves, then the packings |
| Pulsing or surging pattern | Manifold filter and gun filter | Inlet and outlet balls and seats |
| Will not prime | Suction side and dried material | Inlet ball, foot valve seat and cage |
| Coating leaking at the pump or packing area | Piston rod surface | Upper and lower packings, rod and bushing |
This table follows general piston pump behavior. Titan's manual is the authority on your model; confirm the cause there before replacing parts.
Find the part on the diagram
Open the fluid section page, find the numbered callout and add that part. The whole assembly, 805-626A Fluid Section Assembly, is listed on the Main Assembly page, along with the pump block on the fluid section page (805-324A). If your sprayer is a different model, or the callout does not settle it, call (713) 931-0006 with the model and serial number.
Fluid section parts most often needed:
−8%
The Short Version
Packings, piston rod, valve balls and seats, and the manifold filter are the parts that matter on a MultiFinish 440 pump end. Check the filters first, inspect the rod before any packing job, and ask us about kit contents before you order. Use the manual for the procedure and pressure relief.
Not sure which fluid section part you need?
Call (713) 931-0006 with your model and serial number and our parts team will confirm the part before you order.
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