Extrel MAX300-RTG - Mechanical Vacuum Pump

MAX300-RTG : Hardware Manual Hardware Maintenance
57
The lubricating oil for the pump is contained in an absorbent felt cup oil wick
mounted in a plastic housing fitted into the bottom of the pump. The housing has
a groove near the exposed end that can be used to pry it out of its recess. A small
screwdriver is most often used for this procedure. When removing the oil wick, do
not touch anything inside the turbo pump. Once the old oil reservoir is removed,
wipe the old lubricant from the pump with a lint free cloth.
When inserting the new oil wick, take extreme care to not push it too far into the
pump. This can result in pump failure. Insert the new oil wick into the bottom of the
pump by seating it on the plastic plate until it is held in place by its o-ring. The
lubricant reservoir is pre filled with the correct type and amount of oil. Do not add
additional lubricant.
Screw the plastic plate back into the pump bottom. To avoid crossed threads,
initially rotate this plate counter clockwise until a click is felt, and then reverse
direction. If the plastic bottom is not properly seated, a leak could occur and result
in pump failure.
For additional information or recommendations, please contact the manufacturer
directly.
Mechanical Vacuum Pump
Required Tools
 (1) Oil Catch Pan
 (1) Flat Blade Screwdriver
 (1) 5mm Hex Key (Allen Wrench)
 (~500 ml) Roughing Pump Oil
Extrel CMS Technical Support recommends that the oil in the roughing pump for
the MAX300-RTG be changed every six months or if the oil is darker than a light
amber color. The rate of oil deterioration will vary depending on the application.
The first step in this procedure is to vent the vacuum system as described on page
50.
Both the roughing pump and its oil will be hot (up to 80
o
C). After venting the
system, disconnect the inlet line from the enclosure wall and release the slide
latch on the left side of the VacTrac assembly (refer to Figure 29, page 52). Pull
the VacTrac out of the enclosure far enough to place a catch pan under the drain