Master Manufacturing

Troubleshooting Pumps

PROBLEM CAUSE SOLUTION
Pump will not turn on Bad electrical connection Check battery connections
Short in wires Check condition of wires
Locked drive Replace diaphragm assembly
Faulty pressure switch Replace pressure switch assembly
Incorrect voltage Check voltage (±10%)
Fuse Blown Check and/or replace fuse
Pump will not prime Out of product Refill supply container
Inlet air leak Tighten fittings/
Replace cracked fittings
Inlet/ Outlet rube restriction Remove restriction
Incorrect voltage Check voltage (±10%)
Clogged intake valves Remove obstruction
Clogged intake tube Remove obstruction
Low pressure/ flow Worn wobble plate Replace diaphragm assembly
Worn diaphragm Replace diaphragm assembly
Worn pressure switch Replace pressure switch assembly
Inlet/ Outlet tube restriction Remove restriction
Incorrect voltage Check voltage (±10%)
Clogged intake valves Remove obstruction
Clogged intake tube Remove obstruction
Inlet air leak Tighten fittings/ Replace cracked fittings
Pump leaks Loose fasteners Tighten fasteners
Pump seals degraded Replace pump head assembly
Leak in diaphragm Replace diaphragm assembly
Pump cycles while not spraying Leak in the system Tighten leaking hose clamps/ fittings
Faulty pressure switch Replace pressure switch assembly
Incorrect voltage Check voltage (±10%)
Air trapped in system Purge the air from the system
Rough operation Flexible mounting surface Mount pump on rigid surface
Loose pump head Tighten fasteners
Compressed base feet Decompress base feet
Rigid plumbing Plumb pump with flexible plumbing