Maintenance
36 312065V
Pump Lubrication System
Check the condition of the ISO pump lubricant daily.
Change the lubricant if it becomes a gel, its color
darkens, or it becomes diluted with isocyanate.
Gel formation is due to moisture absorption by the pump
lubricant. 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.
Lubricant discoloration is due to continual seepage of
small amounts of isocyanate past the pump packings
during operation. If the packings are operating properly,
lubricant replacement due to discoloration should not be
necessary more often than every 3 or 4 weeks.
To change pump lubricant:
LR
RT
ST
RB
TI10970a
TI10969a
LR
ST
RT
1. Follow the Pressure Relief Procedure, page 25.
2. Lift the lubricant reservoir (LR) out of the bracket
(RB) and remove the container from the cap.
Holding the cap over a suitable container, remove
the check valve and allow the lubricant to drain.
Reattach the check valve to the inlet hose. See FIG.
10.
3. Drain the reservoir and flush it with clean lubricant.
4. When the reservoir is flushed clean, fill with fresh
lubricant.
5. Thread the reservoir onto the cap assembly and
place it in the bracket.
6. The lubrication system is ready for operation. No
priming is required.
FIG. 10: Pump Lubrication System
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