Quick Answer
The correct packing kit for the Titan Impact 440 and 540 is Titan part number 0516091. The process is similar to a Graco rebuild — depressurise, flush, remove the displacement rod, replace upper PTFE and lower leather packings, replace inlet and outlet valves, fill throat with TSL, and reassemble. Total time: approximately 60 minutes. You'll need a Titan-compatible packing wrench and TSL. Call us at 713-931-4102 to confirm the right kit for your specific Titan model.
In This Guide
1. Compatible Titan Impact Models
The Titan Impact series covers a wide range of contractor-grade airless sprayers. The 0516091 packing kit fits the following models — always confirm with your serial number:
Titan Impact 440
0.47 GPM · 3300 PSI
Fits 0516091
Titan Impact 540
0.54 GPM · 3300 PSI
Fits 0516091
Titan Impact 640
0.66 GPM · 3300 PSI
Confirm first
Titan 440i
Variable speed model
Confirm first
Titan 540i
Variable speed model
Confirm first
Titan 640i
Variable speed model
Confirm first
2. Parts & Tools Needed
| Item | Part Number | Notes |
|---|---|---|
| Titan Impact 440/540 Packing Kit | 0516091 | Complete kit — includes all seals and packings |
| Throat Seal Liquid (TSL) | TSL | Graco TSL works in Titan machines |
| Titan Packing Wrench | Model specific | Required — do not use improvised tools |
| 3/4" Combination Wrench | — | For pump housing bolts |
| Torque Wrench | — | Pump cylinder torque: 45–50 ft-lbs |
| Needle-nose Pliers | — | For o-ring removal and inspection |
| Clean Lint-Free Rags | — | For bore cleaning between steps |
Pro tip: Order TSL and the packing kit together. Running a rebuilt Titan pump without TSL in the throat from the first prime cycle dramatically shortens the life of new packings. Don't skip it.
3. Symptoms of Worn Packings on a Titan Impact
- Pump cycles faster than every 15 seconds at rest — with trigger locked and no external leaks, this is the clearest sign of internal packing wear
- Reduced spray pressure — tip pressure drops below normal working pressure even at maximum dial setting
- TSL or paint leaking from throat — visible fluid dripping from the displacement rod area
- Rough or inconsistent spray pattern — pressure fluctuates during spraying
- Machine runs continuously without building pressure — combined with no tip or hose leaks, this points to total packing failure
4. Step-by-Step Packing Replacement
Always depressurise before starting. Titan Impact sprayers operate at up to 3,300 PSI. Trigger the gun to release all pressure, engage trigger lock, and disconnect power before any disassembly.
1
Depressurise & Flush
Turn the prime/spray valve to PRIME. Trigger the gun into a waste container until all pressure is released. Turn off the machine and engage trigger lock. Disconnect power. Run compatible solvent through the pump until clean, then drain completely.
⏱ ~10 min
2
Remove the Displacement Rod Assembly
Locate and remove the two pump housing bolts (3/4" wrench). Carefully extract the displacement rod assembly straight downward. Place on a clean surface. Inspect the rod for scoring — run a fingernail firmly along the length. Any grooves mean the rod needs replacement before new packings will seal.
⏱ ~8 min
3
Remove & Replace Inlet Valve
Unscrew the inlet valve housing from the fluid section. Remove the old ball, spring, and seat. Clean the housing bore with solvent. Install the new inlet valve components from the 0516091 kit in the correct order. Tighten to 45–50 ft-lbs.
⏱ ~10 min
4
Remove & Replace Outlet Valve
Unscrew the outlet valve housing (counterclockwise). Remove old ball and seat. Inspect for debris or wear. Install new outlet valve assembly from the kit. Torque housing to 45–50 ft-lbs.
⏱ ~8 min
5
Remove Old Packings
Using the packing wrench, unscrew the packing nut from the throat bore. Remove upper PTFE packings first, then the lower leather packing. Inspect the bore for corrosion or scoring. Clean with a lint-free rag dampened with solvent.
⏱ ~8 min
6
Install New Packings & Throat Seal
Install the lower leather packing first with flat side facing down toward the pump. Stack upper PTFE packings flat-side up as shown in the 0516091 kit diagram. Install the new throat seal. Tighten packing nut snug — hand tight plus a quarter turn. Never overtighten. Fill the throat cup with TSL.
⏱ ~10 min
7
Replace O-Rings
Clean all o-ring grooves with a lint-free rag. Lightly lubricate each new o-ring with TSL before installing. Ensure each ring is fully seated in its groove without twisting or pinching.
⏱ ~5 min
8
Reassemble & Test
Reinstall the displacement rod into the housing. Tighten pump housing bolts to 18 ft-lbs. Reconnect power. Set pressure dial to minimum. Prime the sprayer — pressure should build within 3–4 strokes. Perform the 15-second cycling test: if the pump holds for 15+ seconds with trigger locked, the rebuild is successful.
⏱ ~8 min
5. Titan vs Graco Rebuild: Key Differences
TITAN IMPACT
Titan-Specific Notes
Uses Titan 0516091 packing kit
Requires Titan-compatible packing wrench
Packing nut thread pitch differs from Graco
Graco TSL works fine in Titan throat
Valve housing torque: 45–50 ft-lbs
GRACO 390/395
Graco-Specific Notes
Uses Graco 18B260 or 17V781 packing kit
Requires Graco packing wrench 218203
Mandatory 239922 inlet valve seat replacement
Valve housing torque: 50 ft-lbs
Housing bolt torque: 18 ft-lbs
The overall rebuild process is very similar between Titan and Graco. The fundamental difference is part numbers and tools. Never use Graco packing kits in a Titan machine or vice versa — thread pitches and packing dimensions differ and will result in leaks or damage.
Shop Titan Impact Packing Kits
Titan 0516091 in stock. Ships same day. Free shipping over $99. 30-day fit guarantee.
6. Frequently Asked Questions
The Titan Impact 440 and 540 use the 0516091 packing kit. This complete kit includes all packings, throat seals, and o-rings needed for a full rebuild. For the 640 and i-series models, confirm compatibility with your serial number before ordering — call us at 713-931-4102.
The process is very similar — depressurise, flush, remove displacement rod, replace packings and valves, add TSL, reassemble. The key differences are: Titan uses part 0516091 (not Graco 18B260), Titan requires a Titan-compatible packing wrench, and the valve housing torque specs differ slightly. Do not cross-use parts between brands.
Yes. Graco TSL is chemically compatible with Titan airless sprayers and works identically to Titan's own throat seal liquid. It's widely available and we stock it at SprayersParts. The throat lubrication function is the same regardless of brand.
On regular contractor use (5 days per week, 6–8 hours per day), Titan Impact packings typically last 6–12 months. Life depends heavily on the coatings used — abrasive materials like textured paints and elastomerics wear packings faster. Regular TSL maintenance and proper flushing between jobs significantly extends packing life.
Most likely causes are: (1) inlet or outlet valve debris or wear not addressed during the packing service, (2) displacement rod scoring preventing new packings from sealing, or (3) packing nut overtightened, compressing packings flat. Run the 15-second test to confirm internal leakage, then inspect valves and rod. Call 713-931-4102 for free diagnosis support.
Titan Impact 440Titan Impact 540Titan 0516091Packing KitPump RebuildTitan SprayerTSLAirless Sprayer
Pro tip: Titan Impact packings wear faster when the machine is run dry. Always prime with water before switching to paint, and flush thoroughly after every use.
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