Ransburg 75785 Service Manual page 62

REA-90 and 90L Spray Applicators - Maintenance
TROUBLESHOOTING GUIDE (Cont. TROUBLESHOOTING GUIDE (Cont. TROUBLESHOOTING GUIDE (Cont.
TROUBLESHOOTING GUIDE (Cont. TROUBLESHOOTING GUIDE (Cont.
General Problem General Problem
General Problem General Problem General Problem
LEAKAGE LEAKAGE LEAKAGE LEAKAGE LEAKAGE
Air Air Air Air Air
Air Air Air Air Air
(At plugged machine
holes in body or at air
valve cap at rear of body)
Fluid Fluid Fluid Fluid Fluid
(At rear of barrel)
Fluid Fluid Fluid
Fluid Fluid
(Slight leak at nozzle
when trigger is released)
Fluid Fluid Fluid Fluid Fluid
(Constant at nozzle)
ELECTRICAL ELECTRICAL ELECTRICAL
ELECTRICAL ELECTRICAL
Wrap Back Wrap Back Wrap Back Wrap Back Wrap Back
Improper or No High Improper or No High Improper or No High
Improper or No High Improper or No High
Voltage Voltage Voltage Voltage Voltage
5 7 5 7 5 7 5 7 5 7
Possible Cause Possible Cause
Possible Cause Possible Cause Possible Cause
1. Defective valve seat or valve spring 1. Clean and lubricate or replace.
1. Loose or defective plugs or cap
1. Cartridge seal assembly and/or
needle/electrode shaft defective
1. Nozzle not secure
2. Air valve closing before fluid valve
1. Worn or damaged fluid nozzle
2. Worn or damaged needle/electrode
3. Loose fluid nozzle
4. Needle/electrode does not seat
when trigger is released
1. Improper target ground
2. Improper spray technique
3. Improper booth exhaust
4. Excessive atomizing air
5. Excessive target distance
1. Faulty low voltage cable connec-
tions
2. Faulty transformer/hook assembly
3. Improper or no ground at control unit
4. Faulty barrel/cascade assembly
5. Faulty low voltage cable
Solution Solution
Solution Solution Solution
1. Tighten or replace Teflon tape.
1. See "Barrel Assembly" in the "Mainte-
nance" section.
1. Tighten.
2. Adjust needle shaft/electrode travel.
1. Replace fluid nozzle.
2. Replace.
3. Tighten.
4. Adjust (see "Trigger Adjustment" in
the "Maintenance" section).
1. Trace and correct (1 megohm maxi-
mum ground to target resistance).
2. See ITW Ransburg "REA Applicator
Spray Techniques" manual.
3. Trace and correct.
4. Reduce pressure.
5. Decrease distance between applicator
and target.
1. Check and secure at the applicator and
at the control unit.
2. Replace.
3. Trace and correct (1 megohm maxi-
mum ground to target resistance).
4. Replace.
5. Replace.
AH-94-04.7