Flushing - Graco Bulldog Hydra-Cat Series Instructions And Parts List

When to Flush the System
D Flush the system before its first use to remove the
light oil which was left in after factory testing.
D Flush the manifold mixer (N), using the solvent
pump, as frequently during the day as necessary to
avoid exceeding the pot life limit of the material
being pumped.
D Flush frequently enough during regular operation to
prevent clogged passages due to material being
overheated or dried out in any part of the system.
Clogged passages in the heater can be very difficult
to clean and can reduce heating efficiency, flow rate
and pressure.
D Flush the entire system when the system is shut
down for a long period of time. Keep in mind that
some moisture may get into the lines, which could
contaminate the hardener, so flush again before
restarting the system.
KEY
A Bleed-type master air valve
A1 Hardener feed pump
A2 Resin feed pump
A3 Proportioning pump
A4 Solvent pump
A5 Feed and Proportioning pump master
air valve
A6 Solvent pump master air valve
A5
E1
Fig. 14
16 308225

Flushing

E Pump air regulator
E1 Hardener feed pump
E2 Resin feed pump
E3 Proportioning pump
E4 Solvent pump
J Fluid pressure gauge
J1 Proportioning pump intake
J2 Proportioning pump outlet
E3
A1
A2
E2
How to Operate the Mixer Manifold
To open or close the mixer manifold fluid valves (LL)
push the handle (KK) down to open and up to close.
See Fig. 13.
1 UP – closed
2
DOWN – open
Fig. 13
A3
H
J2
J1
Q1
KK
LL
1
2
N1
N
P1
H Proportioning pump
N Mixer manifold
Q Fluid shutoff valve
Q1 Proportioning pump intake
Q2 Mixer manifold solvent inlet
A6
N
Q2
E4
A4
LL
N2
P2
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