troubleshooting

Problem

Cause

Possible Solution

 

 

 

 

 

Pump does not prime

Prime/Spray valve is in Spray position

Turn Prime/Spray lever to Prime

 

 

Inlet screen is clogged or intake tube is not

Clean debris off inlet screen and make

 

immersed

sure intake tube is at bottom of paint

 

 

bucket

 

 

Inlet valve check ball is stuck

Tap firmly on the outside of the inlet valve

 

 

with a small wrench, allowing pump to

 

 

prime properly

 

 

 

Remove intake tube and place a pencil

 

 

into the inlet section to dislodge the ball,

 

 

allowing pump to prime properly.

 

 

Intake tube is loose

Tighten intake tube with flat-head

 

screwdriver

 

 

 

 

 

Motor seems to be running

Reversible spray tip is worn

Replace spray tip

 

properly but pressure drops when

Spray tip is clogged

Turn spray tip 180° and spray to clean

pistol-grip sprayer is triggered

Suction tube and filter are loose or

Reinstall or replace suction tube and

 

 

damaged

filter as needed

 

 

Pistol-grip sprayer filter is clogged

Clean or replace pistol-grip sprayer

 

Material being sprayed is too thick

filter

 

 

Follow material manufacturer’s directions

 

 

 

Inlet valve is damaged or worn

and thin material as needed

 

 

Replace inlet valve

 

 

Intake tube is loose

 

 

Tighten intake tube

 

 

 

 

 

 

 

 

Prime/spray lever is set to spray

Prime/spray lever is dirty or damaged

Contact Authorized Service Center

 

but there is flow through the prime

 

 

 

tube

 

 

 

 

 

 

 

Pistol-grip sprayer leaks

Internal sprayer parts are worn or

Contact Authorized Service Center

 

 

damaged

 

 

Nozzle tip guard leaks

Nozzle tip guard or spray tip were assembled

Reassemble according to nozzle tip guard

 

improperly

and Spray tip assembly instructions

 

 

 

 

Pistol-grip sprayer will not spray

Spray tip is clogged

Turn spray tip 180° and spray to clean

 

Pistol-grip sprayer filter is clogged

Clean or replace pistol-grip sprayer

 

Spray tip is not fully seated into nozzle tip

filter

 

 

guard

Reassemble according to nozzle tip guard

 

 

and Spray tip assembly instructions

 

 

 

 

Paint pattern is weak or uneven

Pressure is set too low

Turn variable pressure control to a higher

 

 

setting

 

 

Pistol-grip sprayer or intake tube filter is

Clean or replace filters

 

 

clogged

 

 

 

Intake tube is loose at inlet valve

Tighten tube fitting

 

 

Spray tip is worn

Replace spray tip

 

 

Material being sprayed is too thick

Follow material manufacturer’s directions

 

 

and thin material as needed

 

 

Loss of pressure

See Cause/Possible solutions

for

 

 

Pressure setting is too low, and Motor

 

 

seems to be running properly but

 

 

pressure drops when pistol-grip

is

 

 

triggered

 

14 — English

Page 19
Image 19
Milwaukee M4910-20 manuel dutilisation Pressure setting is too low, and Motor, Seems to be running properly but