Question about Stanley Professional Backpack Poly 4-Gallon Sprayer #61804
The darker Seal has come off the plunger at the bottom of the unit , easy 5 min fix , just unscrew the allen keys at the bootonm take off the cover and remove the plunger , you'll see the plunger seal still inside you can fish it out with an allen key or similar tool clip it on again and reassemble
Posted on May 31, 2010
Sounds like your seal on the pump is shot.
remove the piston / pump handle and check the seal.
probably dried up and fell apart and you need a new one.
Posted on Feb 20, 2010
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