Repair
Change Pump Lubricant
Check the condition of the ISO pump lubricant daily.
Change the lubric ant if it becom es a gel , its co lor
darkens , or it b ec ome s di lu ted wi th iso cy an ate .
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 min imizes
expos ure to mo is ture, b ut so me c ont ami nation i s s til l
possible.
Lubricant dis coloration is due to conti nual see page of
small amounts of isocyanate past the pump packings
during operation. If the packings are operating
properly, lub ricant replac em ent du e to di sc olorati on
shoul d no t b e ne ce ss ary more often than every 3 or
4weeks.
To c ha nge p ump lub ric ant:
1. Follow Pre ssure Relief Procedure, page 43.
2. Lift th e lubric ant res erv oir (R) out o f the brack et
and remove the container from the cap. Holding
the cap over a suitable container, remove the
check v alve and allow the lubricant to drain.
Reattach the che ck valve to the inlet hose.
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
placeitinthebracket.
6. The lubrication system is ready for operation. No
priming is required.
Pump Lubrication System
Figure 2
48 333024F
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