Handler IV Operator's Manual page 21

Problem
Suction line is drawing air.
Clogged suction lines.
Leaking at manifold fitting.
Leaking at threaded fitting.
Leaking at hose barbs.
Page 20
Cause
Plumbing Package
Incorrect valve setting.
Dry Product Mixing
Granular product is insufficiently
dissolved.
Loose clamp, no gasket, wrong
g a s k e t , d a m a g e d g a s k e t ,
misaligned fitting.
Not tight enough or needs
sealant.
Loose clamp.
Solution
Reduce suction from sprayer tank by partially
closing the valve. This will regulate the speed at
which product mixture is drawn from the Handler.
Force water back into the venturi by opening
bypass valve. This allows water to back up into
the Handler tank and dislodge the obstruction.
Check clamp for tightness, tighten if necessary.
Check for gasket, size, and condition. Install or
replace gasket as required. Align fittings before
clamping.
Tighten fitting. Take fittings apart, apply sealant.
Reassemble and tighten.
Tighten clamps.