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AllTitanParts

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Titan 704-180 Pump Block

Titan 704-180 Pump Block

Sourced From:
Titan Tools Inc.

 

704-180 is a replacement pump block (fluid section housing) used on compatible Airless Sprayer models. It forms the core of the pump assembly, housing the piston, packings, inlet and outlet valves, and providing the fluid passages for paint flow under pressure.

Part Number 704-180
Part Description Pump Block
Brand Airless Sprayer
Fits Airless Sprayer 340, 440I
Condition New

Retail Price: $248
You save: $34.47 (13.90%)
Our Price: $213.53

 

Pump Block for Airless Sprayer 340 / 440i

The 704-180 Pump Block is the central fluid housing in the pump assembly of compatible Airless Sprayer models. It contains the cylinder bore where the piston reciprocates, and provides mounting points for the inlet valve, outlet valve, packings, and connecting rod. A crack, worn bore, or stripped thread in the pump block can cause pressure loss, fluid bypass, external leaks, or complete pump failure.

Replacing a damaged pump block restores proper piston alignment, valve seating, and hydraulic integrity. This part is typically replaced during major pump rebuilds when the housing itself is compromised, rather than just internal seals or valves.

Service Guidance: Before replacing the pump block, inspect for visible cracks, scoring inside the bore, or damaged threads. Always use new packings and seals when reinstalling valves and piston. Torque fasteners to manufacturer specifications.

What it does and when to replace it

What the pump block does
Houses piston & packings Provides precision bore for piston movement and seal retention
Fluid passages Directs paint from inlet to outlet under high pressure
Structural support Mounts valves, connecting rod, and attaches to motor housing
When replacement is recommended
Cracked housing Visible crack leaking paint or air
Scored / worn bore Scratches or wear that prevent proper sealing
Stripped threads Threads for valve retainers or mounting bolts are damaged
Corrosion or erosion Pitting from water or abrasive materials

Compatibility

Part 704-180 is compatible with the following Airless Sprayer models. Always verify with your machine's parts diagram before ordering.

Brand / Model Component
Airless Sprayer 340 Pump block (fluid housing)
Airless Sprayer 440I Pump block (fluid housing)

Related parts commonly serviced together

When replacing the pump block, these internal components should be replaced at the same time to ensure a complete and reliable repair.

Piston / rod assembly

Worn piston can damage a new bore. Inspect and replace as needed.

Packing set (seals)

Always install new packings when rebuilding the pump block.

Inlet & outlet valve kits

Valves seal against the block; replace them to avoid rework.

Frequently Asked Questions

The pump block is the main aluminum or steel housing that contains the piston and valves. It fails due to cracking from freeze damage, internal scoring from abrasive paint or worn piston, stripped threads from over-tightening, or corrosion over time.

If you have persistent external leaks (crack), severe loss of pressure with new packings (worn bore), or cannot tighten valve retainers (stripped threads), replace the block. If the bore looks smooth and threads are intact, a seal kit is usually sufficient.

This pump block fits Airless Sprayer models 340 and 440I. It may also fit other units with the same fluid section design; consult your parts manual to confirm.

At a minimum, replace the piston packings (seals). It is also wise to install new inlet and outlet valve kits, and inspect the piston rod for wear or scoring. This ensures a full pump rebuild and avoids repeat disassembly.

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