This guide covers how to use the ED655 parts diagram to identify what you need, and the step-by-step rebuild sequence for the fluid section and paint pump assembly.
Reading the ED655 Parts Diagram
The ED655 parts catalog at AllTitanParts.com is organized into assembly groups: the Titan ED655 paint pump assembly, the G-10 spray gun, the hopper assembly, and associated accessories. For fluid section service, the pump assembly diagram is the section you need.
The pump assembly exploded view shows the inlet valve at the bottom, the piston rod and packing stack in the center, and the outlet valve above — the same organization as any piston pump airless sprayer. Each component has a reference number corresponding to an OEM part number in the adjacent parts list. Always order by the OEM part number, not the reference number alone.
ED655 Fluid Section Rebuild — Step by Step
Relieve Pressure and Flush
Trigger the gun into a waste container with the prime valve open until all pressure is released. Flush with the appropriate solvent until discharge runs clear. Never skip this step.
Identify Parts Before Disassembly
Pull up the ED655 pump assembly diagram on AllTitanParts.com's parts diagram tool and confirm the OEM part numbers for your packing kit, inlet valve, and outlet valve before you open the fluid section. Having parts confirmed in hand means no waiting mid-repair.
Remove the Fluid Section
Disconnect the suction tube and high-pressure hose. Detach the fluid section from the pump housing following the ED655 service manual sequence — the exact attachment method varies from other Titan models, so reference the manual rather than assuming the same procedure as an Impact 440.
Remove and Inspect the Inlet Valve
The inlet valve is at the bottom of the fluid section. Remove, clean with solvent, and inspect the ball and seat for scoring or debris. Replace if any scoring is visible — a marginal inlet valve reinstalled doesn't improve.
Remove and Inspect the Outlet Valve
Remove and inspect the outlet valve using the same process. If replacing the inlet valve, replace the outlet valve in the same service.
Disassemble the Packing Stack
Remove the packing nut and disassemble the packing components in sequence — photograph the stack before disassembly so the reassembly order is clear. The packing diagram in the service kit confirms the correct installation order.
Inspect the Piston Rod
Run your fingernail along the rod surface perpendicular to its axis. Any drag or roughness means the rod needs replacement alongside the packing — never install fresh packing on a scored rod.
Reassemble and Torque to Spec
Install new packing in the documented sequence. Torque the packing nut to the specification in the service manual — not by feel. Over-tightening is the most common assembly error and causes premature packing wear.
Test Before Returning to Service
Prime with clean water, build to operating pressure, and check for leaks, consistent pressure, and normal priming before returning the machine to coating material.
The full ED655 pump and gun assembly parts are available at AllTitanParts.com. For components across the broader electric airless sprayer parts range — Titan Impact, SprayTech, and Wagner models — the same diagram-based ordering process applies across every model in the catalog.
Nnanna Otuonye is the founder of AllTitanParts.com, an authorized OEM dealer for Titan, SprayTech, Wagner, and Speeflo airless spray equipment, located at 5250 Gulfton St, Suite 1H, Houston, Texas 77081. With over 20 years in the spray equipment industry, Nnanna supplies painting contractors and industrial coating professionals across the United States with genuine factory parts and same-day shipping.
As the lead author of the AllTitanParts blog, he shares diagnostic guides, maintenance schedules, and OEM parts advice drawn from two decades of hands-on field experience.
