User's Manual

Maintenance
48 3A2797G
IsoGuard Select
™
System
Check the condition of the A (Red) pump IsoGuard
Select fluid daily. Change the fluid if it becomes a gel, its
color darkens, or it becomes diluted with isocyanate.
Gel formation is due to moisture absorption by the pump
IsoGuard Select fluid. The interval between changes
depends on the environment in which the equipment is
operating. The pump lubrication system minimizes
exposure to moisture, but some contamination is still
possible.
Fluid discoloration is due to continual seepage of small
amounts of isocyanate past the pump packings during
operation. If the packings are operating properly,
IsoGuard Select fluid replacement due to discoloration
should not be necessary more often than every 3 or 4
weeks.
To change pump IsoGuard Select fluid:
1. Perform Pressure Relief Procedure on page 44.
2. Remove fittings from IsoGuard Select fluid cylinder
inlet and outlet ports. Keep supply tube, return tube,
and leak management tube connected to the fit-
tings.
3. Carefully place ends of tubes with fittings still con-
nected into an empty pail to drain IsoGuard Select
fluid.
4. Lift the IsoGuard Select fluid reservoir out of the
bracket and remove the container from the cap.
Holding the cap over a suitable container, remove
the inlet check valve and allow the IsoGuard Select
fluid to drain. Reattach the check valve to the inlet
hose. See F IG . 26.
5. Drain the reservoir and flush it with clean IsoGuard
Select fluid.
6. When the reservoir is flushed clean, fill with fresh
IsoGuard Select fluid.
7. Thread the reservoir onto the cap assembly and
place it in the bracket.
8. Push the supply tube approximately 1/3 of the way
into the reservoir.
9. Push the return tube into the reservoir until it
reaches the bottom.
NOTE:
The return tube must reach the bottom of the reservoir,
to ensure that isocyanate crystals will settle to the bot-
tom and not be siphoned into the supply tube and
returned to the pump.
Prime IsoGuard Select Fluid Cylinder
Ensure that the IsoGuard Select fluid cylinder outlet
faces upward for air to exhaust.
1. Remove check valve from end of inlet tube.
2. Cut tip of IsoGuard bottle and fill the reservoir
through the tube.
3. With check valve arrow pointing towards the
IsoGuard Select fluid cylinder, install check valve in
end of inlet tube.
4. Install tubes into reservoir and install reservoir into
holder.
F IG . 26: IsoGuard Select Fluid System
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