Installing a spray gun repair kit follows the same basic sequence across these Titan guns: relieve pressure, remove the trigger assembly, inspect the diffuser and housing, replace the seal assembly, reassemble, and test. This page walks through that sequence and names the parts to check on the RX-80, S-3, and S-7, but your gun's manual has the exact procedure. AllTitanParts.com is based in Houston, Texas. Most available items are processed for shipment within about 1-2 business days, and some are ordered from the manufacturer after you order (see Shipping Info).
Before You Start
Confirm the repair kit matches your exact gun model before beginning. The general sequence below applies across the RX-80, S-3, and S-7 gun families, though the parts differ between them. Have the manual for your gun open; the Titan manuals page has them. If you are not sure which diagram is yours, S-3, S-5 and S-7 Gun Parts: Which Diagram and Which Kit explains how to tell.
Step 1: Relieve Pressure
Follow the pressure relief procedure in your sprayer's manual before any service, then engage the gun's trigger lock. Airless fluid is under very high pressure and can inject through the skin, so never work on a gun that may still hold pressure.
Step 2: Remove the Trigger Assembly
Remove the trigger screw and trigger assembly as your manual describes, and look over the retractor pin for wear. The RX-80 diagram lists 0538222 trigger and lock assembly and 0538305 retractor pin; the S-3 and S-7 diagrams list 0502074 trigger assembly and 0502079 retractor pin on the S-3. Keep removed parts organized in the order you took them out.
Step 3: Inspect the Diffuser and Housing
Check the diffuser for wear or buildup and look at the housing the seal seats against for damage before installing new seals, since damage there can make a fresh seal leak. The RX-80 uses the 0538200 7/8 inch diffuser; the S-3 and S-7 list the 550-277 one hole diffuser.
Step 4: Replace Seals
Remove the old seals and install the new seal assembly: 0538210 on the RX-80, 550-264 packing seal assembly on the S-3 and S-7. Do not force a seal that does not seat correctly; that usually signals a fitment issue worth double-checking against the diagram before going further.
Step 5: Reassemble
Reinstall the trigger assembly and trigger screw. If the screw looks worn or damaged, order a replacement; the S-3 and S-7 diagrams list 580-513 (short) and 0502068 (long). Confirm the trigger moves freely and returns crisply.
Step 6: Test Spray
Reconnect the gun, keep the tip guard fitted, and run a short test spray on scrap material, pointed away from yourself and others, before returning the gun to production. That catches any installation issue while it is still a quick fix.
Gun-Specific Notes
- RX-80: the site lists 0538215 and 2440648 as RX-80 repair kits. Confirm the number against the current diagram, and see RX-80 Gun Parts: What Each Callout on the Diagram Is for the callouts.
- S-3 and S-7: both diagrams list the 550-276 gun repair kit. Dealer listings describe it as a diffuser O-ring, a 7/8 inch diffuser, a packing seal assembly, packing grease and thread locker, so check the listing for what your version contains.
- RX-Pro and RX-Apex: if the gun leaks or spits at the tip after the trigger is released, Titan's manual points to the ball valve in the packing seal assembly and the seat in the diffuser; the ball valve kit is 0538221. See RX-Pro Gun Leaking or Spitting at the Tip and the RX-Pro diagram.
When a Repair Kit Is Not Enough
If the same symptom keeps coming back after a kit has been installed, look at what a kit does not replace: the gun head or housing, the filter, the tip and the tip seal. A worn tip can look like a gun problem, so check it before another round of seals; tip seals and seats are on the site, including the 651-020 tip seal listed on all three diagrams. For kit numbers by gun model, see Titan Airless Gun Repair Kits by Model.
Keeping Repair Kits on Hand
For a shop or crew running guns daily, keeping a repair kit for each gun model on hand means a worn gun can be serviced when it fails rather than waiting on a parts order while it sits idle. Match each kit to the diagram for the exact gun before you stock it. For cleaning the gun between jobs, see How to Clean an Airless Spray Gun, Tip and Tip Guard After Use.
How to Order a Gun Repair Kit
AllTitanParts.com is an Authorized Titan Dealer supplying genuine OEM replacement parts for Titan, SpeeFlo, SprayTech and Wagner equipment, based in Houston, Texas. Orders are processed on business days with a 12 pm Eastern cut-off. Most available items are processed for shipment within about 1-2 business days; some items are ordered from the manufacturer after you order, so availability shown does not always mean an item is on a shelf. Delivery dates are estimates. See Shipping Info for details. Call (713) 931-0006 if you are unsure which kit matches your gun.
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