Solution
1. Check
2. Increase
3. Replace
4. Replace
5. Replace
6. Replace
1. Check siphon hose o-ring and/or let paint
circulate in with PRIME/SPRAY valve in the
PRIME position
2. Increase pressure
1. Check supply
2. Clean
3. Clean and replace
4. Thin material
1. Tighten connections
2. Tighten, check for leaks
3. Service or clean
4. Replace
5. Clean or replace
6. Reverse
7. Replace
1. Increase
2. Clean or replace
3. Change or replace
1. Replace with a minimum 50' grounded
nylon braid high pressure hose
2. Change or replace
3. Decrease pressure and engine speed
1. Replace
Solution
1. Inspect connections for air leaks
2. Disassemble and clean
3. Inspect and adjust
4. Inspect and replace
1. Replace
2. Adjust
3. Clean
1. Check fluid supply
2. Clean
3. Replace
Cause
1. Unit unplugged or circuit fuse blown
2. Pressure setting too low
3. Brushes on motor are worn
4. Electric motor burned out
5. Switch defective
6. Fuse in pump blow
1. Air leak in siphon hose
2. Insufficient pressure
1. No paint
2. Inlet screen clogged
3. Pump/gun filter clogged
4. Pump will not prime, material too heavy
1. Air leak in system
2. Air leak in siphon hose
3. Inlet valve not seating
4. Worn packings
5. Dirty or worn ball valves
6. Worn valve seats
7. Worn PRIME/SPRAY valve
1. Pressure setting too low
2. Plugged filters
3. Spray tip too big or worn
1. Wrong type of hose
2. Spray tip too big or worn
3. Excessive pressure
1. Worn out packings
Cause
1. Air in system
2. Dirty gun
3. Needle assembly out of adjustment
4. Broken or chipped seat
1. Worn or broken needle and seat
2. Needle assembly out of adjustment
3. Dirty gun
1. No paint
2. Plugged filter or tip
3. Broken needle in gun
Troubleshooting
Airless Pump
Problem
Electric motor won't run
Pump won’t prime
Insufficient material flow
Pump will not maintain
pressure
Not enough pressure
Excessive surge at spray gun
Paint leaks into oil cup
Airless Gun
Problem
Spitting gun
Gun will not shut off
Gun does not spray
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