Graco Husky 307 User Manual (English)

Questions and Answers:

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Thomas GibsonAug 16, 2025
Why are there air bubbles in the fluid from my Graco Water Pump?
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  veronica98Aug 16, 2025
  Air bubbles in the fluid can be caused by several issues. The suction line may be loose or lack thread sealant; tighten it and apply a compatible liquid thread sealant or PTFE tape. A ruptured diaphragm can also cause this, so you may need to replace the diaphragm. Check if the manifolds are loose or if the o-rings are damaged; tighten the manifold bolts or nuts and replace the o-rings if needed. Lastly, ensure the outer diaphragm plates are tightened.
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hwestAug 22, 2025
How to fix a Graco Husky 307 Water Pump that won't cycle?
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  michael94Aug 22, 2025
  If your pump isn't cycling, it could be due to a few reasons. The air valve might be stuck or dirty; try turning the reset shaft, or disassemble and clean the air valve using filtered air. Another possibility is a worn or broken detent link; replace the detent link and ball. Also, check the springs, valve cup, and plate for damage and replace them if necessary.
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Harry LivingstonAug 26, 2025
Why is there fluid in the exhaust air of my Graco Husky 307?
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  Alicia WoodAug 26, 2025
  Fluid in the exhaust air usually indicates a ruptured diaphragm. Replace the diaphragm. It can also be caused by loose outer diaphragm plates, so ensure that the plates are tightened.
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Tina BatesAug 28, 2025
What causes a Graco Water Pump to cycle at stall or fail to hold pressure?
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  fullerjamesAug 28, 2025
  If your pump cycles at stall or fails to hold pressure, it could be due to leaking check valves or o-rings; in this case, replace these parts. It may also be caused by worn check balls or seats, which would also need replacement. Another possibility is a check ball wedged in the seat; try replacing the ball.
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Carolyn AlexanderAug 31, 2025
Why is my Graco Husky 307 leaking excessive air from the exhaust port?
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  Angel DanielAug 31, 2025
  Excessive air leakage from the exhaust port can occur if the air valve cup or plate is worn; replace these parts. Another cause could be worn shaft seals, which would also need replacement.
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james90Sep 3, 2025
Why does my Graco Water Pump exhaust air at stall?
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  Aaron WarnerSep 3, 2025
  If your pump exhausts air at stall, it could be because the air valve cup or plate is worn, so replace these parts. Alternatively, the shaft seals may be worn, requiring replacement.
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Glenn SmithSep 6, 2025
Why is my Graco Husky 307 Water Pump exhausting air near the air valve?
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  nathanjonesSep 6, 2025
  If your pump is exhausting air near the air valve, first check if the air valve screws are loose and tighten them. If that's not the issue, inspect the air valve o-ring for damage and replace it if necessary.
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christopher53Sep 9, 2025
Why is my Graco Husky 307 Water Pump leaking fluid from the check valves?
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  Samantha ValentineSep 9, 2025
  Fluid leaking from the check valves indicates that the o-rings are worn or damaged. Inspect and replace the o-rings.
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Linda TorresSep 10, 2025
What to do if my Graco Water Pump operates erratically?

Graco Husky 307 Specifications

General

Maximum Flow Rate	7 gpm (26.5 lpm)
Maximum Fluid Pressure	100 psi (7 bar)
Maximum Operating Temperature	150°F (66°C)
Weight	6.5 lbs (2.95 kg)
Fluid Inlet Size	3/8 in npt(f)
Fluid Outlet Size	3/8 in npt(f)
Wetted Parts	Polypropylene, Santoprene
Inlet Size	3/8" NPT
Outlet Size	3/8" NPT
Air Inlet Size	1/4" NPT