Graco Bulldog Hydra-Cat 231836, Instructions And Parts List

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Operation
Checking the Mix Ratio
WARNING
INJECTION HAZARD
To reduce the risk of serious injury,
follow the
Pressure Relief Procedure
on page 19 whenever you are instructed
to relieve the pressure.
NOTE: Since this is a fixed ratio system, you typically
do not have to check the mix ratio.
If the mixed fluid does not cure or harden properly,
check the ratio of resin to hardener.
1. Flush the mixer manifold; see Step 11, page 17.
2. Follow the Pressure Relief Procedure , page 19.
3. Open the mixer manifold (N).
4. Set the operating pressure for the pumps. See
Steps 7 and 8 on page 21.
5. Release the dispensing valve trigger and engage
the safety latch.
6. Close the mixer manifold (N).
7. Open the hardener side drain valve (P2) about
three turns. Open the resin side drain valve (P1)
about 1 turn. This prevents the pressure from
building up on the hardener pump, which would
cause the automatic pressure relief valve to open.
8. Place a grounded metal pail under the drain
valves.
9. Open the mixer manifold.
10. While observing the pump outlet gauges (J2),
adjust the resin and hardener drain valves (P1,P2)
until the gauges show your normal operating
pressure.
NOTE: The pressure must be within 20% of the orig-
inal spraying pressure to get a usable test.
11. Close the mixer manifold. Put a separate sampling
container under each drain valve.
12. Open the mixer manifold to draw a sufficient
sample.
13. As you close the mixer manifold, check the pump
outlet gauges (J2) again to make sure they are at
your normal operating pressure.
NOTE: If the fluid pressure is not within 20% of the
normal operating pressure, flush the mixer manifold
again and take another sample. If the sample ratio is
incorrect, refer to the Troubleshooting chart on page
24. If the ratio is correct, the problem is with one of the
other system components.
14. Compare the volume of the sampling containers. If
the ratio is not correct, refer to the Troubleshooting
chart on page 24. If the ratio is correct the problem
is one of the other components.
15. Close the drain valves (P1,P2).
Fig. 18
N
P1
KK
P2
J2
J2
02898A