Echo MS-41BP - Manual (Page 8)

Difficulty actuating the pump lever and/or Upper valve plate sticks Clean or replace valve plate
pump handle moves itself back up. Piston cylinder outlet passage clogged Clean piston cylinder outlet passage
Little or no resistance during Damaged/worn/dirty/upper and or lower valve plate Clean or Replace Valve Plate
repeated pumping – no pressure. Damaged /worn upper o-ring on piston Replace O-ring
Piston Collar or piston cylinder assembly is worn Replace Collar or Piston cylinder assembly
Too much resistance after just a few
Not enough air cushion in the pressure Release pressure in pressure chamber
pumping strokes but pressure only lasts chamber Remove the hose & drain pressure
briefly. chamber. Reconnect the hose.
Upper valve plate damaged/worn/dirty Clean or replace upper valve plate
Upward pumping action is more difficult
Vent hole is clogged Clear the vent hole in cap
and/or pump handle moves itself Lower valve plate sticks Clean or replace the valve plate
backdown. Clogged filter Clean in tank filter
Piston cylinder intake clogged Clean piston cylinder intake
When the handle is pulled up it moves Valve Plate sticking Clean or replace valve plate
itself back down
Leaks at Piston Cylinder Damaged/worn/Dirty Collar Clean or Replace Piston Collar
Damaged Piston Cylinder Replace Piston Cylinder
Damaged Piston Replace Piston
Shut-off leaks Connections loose Tighten connection
Worn or damaged shut-off Rebuild or replace the shut-off valve
Wand assembly leaks Connections loose Tighten connection
Damaged or worn o-ring/gasket Replace o-ring/gasket
Nozzle assembly leaks Connections loose Tighten connection
Damaged or worn o-ring/gasket Replace o-ring/gasket
Leak between pump assembly Pump clamp loose Tighten clamp
and tank O-ring worn or damaged Replace pressure chamber o-ring
Hose leaking at tank outlet Hose clamp loose Tighten clamp
Hose leaking at shut-off Connection loose Tighten retaining nut
Damaged or worn o-ring/gasket Replace o-ring/gasket
STORING / MAINTAINING YOUR SPRAYER
• The sprayer should be stored out of direct sunlight in a cool dry space.
• Before freezing weather make sure to drain all liquid in the tank, pump, pressure cylinder, hose,
shut-off valve, wand and nozzle, to avoid liquid expansion and cracking in the sprayer components
(See “Cleaning” section). Lock the shut-off valve in the “open” position.
• When service is required call your nearest dealer and always insist on original manufactured
replacement parts.
• Inspect the hose, wand, pump, tank and shut-off valve for wear, damage or leaks on a regular basis
and repair defects promptly.
TROUBLE SHOOTING YOUR SPRAYER
Symptom Possible Reason Correction
7E