Graco Reactor E-10 Instructions-Parts List Manual page 33

PROBLEM
One side doesn't come up to
pressure in spray mode.
Pressure is higher on one side when
setting pressure with function knob.
Pressures are not balanced when
running, but pressure is generated
and holds on both strokes.
Fluid leak in pump packing nut area. Worn throat seals.
Pressure doesn't hold when stalled
against gun in spray mode.
Pressure is higher on B side during
startup of recirculation, especially in
High Recirc mode.
Resin froths and overflows tank after
refilling hot equipment.
One gauge shows half as many
pulses as the other when pumps are
cycling.
311075ZAB
CAUSE
Dirty or damaged Spray valve.
Plugged fluid inlet strainer.
Pump intake valve plugged or stuck
open.
Material is too viscous to pump with
unheated unit.
Pump intake valve partially plugged.
Air in hose. Fluid is compressible.
Unequal size hoses or unequal hose
construction.
Unequal viscosities.
Restriction on one side.
Leaking Spray valve.
Leaking piston valve or intake valve
in displacement pump.
Leaking gun shutoff.
This is normal. Component B is
typically higher viscosity than
component A until the material is
heated during recirculation.
Agitation from pouring. Hot material
in heaters and hoses froths when not
under pressure.
Loss of pressure on downstoke.
Loss of pressure on upstoke.
Troubleshooting
SOLUTION
Clean or repair, see
Recirculation/Spray Valves, page
37.
Clear, see Maintenance, page 27.
Clean pump intake valve. See step ,
page 38.
Warm material before adding to
tanks.
Clean pump intake valve. See step ,
page 38.
Purge air from hose.
Use matching hoses, or balance
pressures before spraying.
Change temperature setting to
balance viscosities.
Change restrictor at mix point to
balance back pressure.
Clean mix module or restrictor at mix
manifold.
Clean gun check valve screens.
Replace. See your pump manual.
Repair, see Recirculation/Spray
Valves, page 37.
Repair. See your pump manual.
Repair. See your gun manual.
No action required.
Turn heaters off before refilling.
Leave hoses pressurized. See At
High Ambient Temperature (above
75°F/24°C), page 24.
Intake valve is leaking or not closing.
Clean or replace valve; see step ,
page 38.
Piston valve is leaking or not closing.
Clean or replace valve or packings;
see Displacement Pump, page 38.
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