HP 5973 - To Check and Add Foreline Pump Oil

102
4 Maintaining the MSD
To check and add foreline pump oil
To check and add foreline pump oil
Materials needed: Foreline pump oil (6040-0834)
Funnel
A slow loss of oil is normal for the foreline pump. Therefore, it is especially impor-
tant to check the oil level regularly.
1 Examine the oil level window.
The oil level should be above the lower line. The foreline pump oil should be
almost clear. If the oil level is near or below the lower line, follow the steps 2 – 6 to
add foreline pump oil.
If your MSD is nearing its scheduled time for replacement of the foreline pump oil,
replace the oil instead of adding oil.
If the oil is dark or cloudy, replace it. See page
104 for instructions about replacing the foreline pump oil.
2 Vent the MSD (page 52).
3 Remove the fill cap.
4 Add pump fluid until the oil level in the window is near, but not above, the
upper line.
5 Reinstall the fill cap.
6 Pump down the MSD (page 58).
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