|
Problem
|
Possible
Causes |
|
Balls Drop
|
Catalyst
not flowing. Bottom needle valve plugged strainer.
|
|
Balls Fluctuate
|
Vibration
causing partial closing of needle valve. Open or tighten
packing to stop vibration effect.
|
|
Balls Overshoot
|
Top
valve is open too far.
|
|
Balls Stick
|
Dirty
ball and glass tube assembly.
|
|
Catalyst Leaks
or Drips
|
Catalyst
valve not seating properly, loose packing, loose hose
connections.
|
|
Cavitating Pump
Sucks Air
|
Remove
siphon tube and place directly into resin. If pump operates
correctly then siphon tube is too small or there is a
leak in the siphon system.
|
|
Clogged Screen
|
Batch
lumpy or partially gelled; old material still clinging
to pump mixes with new batch when pump is placed in
fresh drum; clean screens and pump periodically when
material builds up.
|
|
Gun Drips Catalyst
|
Trigger
adjustment; seat or seals worn; air valve damaged; sticking
trigger, valve, or seat; loose connection.
|
|
Gun Drips Material
|
Needle
is worn, sticking, or bent; needle seating needs adjustment;
packing or seals worn; loose connections.
|
|
Material Leaking Around the Pump Shaft
|
Replace,
clean, or tighten loose or worn seals (stop pump in lowest
position when not in use); check for worn shaft.
|
|
Poor Breakup
of Gel Coat
|
Check
hose length, diameter, and pressure. Nozzle and air cap
may be worn or clogged. Faulty regulator. Check valves
for sticking. Inadequate atomization air. Airless, spray-fluid
pressure too low; orifice too large; worn tip; or inadequate
CFM.
|
|
Pump Shaft
Motion Erratic
|
Check
filters. Internal packing may be worn. Starved pump. Fill
lubricating cup around pump shaft (Binks Pumps).
|
|
Spray Pattern
Off-Center
|
Air
cap partiually clogged; nozzle damaged; worn or bent fluid
needle; worn air cap or nozzle. Airless tip worn or damaged.
|
