4.5 - GREEN MACHINE
™
- North America - Installation, Operation, Maintenance, & Troubleshooting Manual
Chapter 9: Replacement Procedures
Page 176
9.8.3
Replacing the Vacuum Pump
1.
The new pump will come with a drive coupling and rubber flange sleeve.
See Figure 9-22.
2.
Install the flange coupling on to the pump shaft. Then install the rubber flange sleeve
into the pump flange coupling so that when the pump is installed, the rubber flange
sleeve mates with the motor flange coupling.
3.
Place the new Vacuum Pump on the base and align the mounting holes.
Remember to re-install the shims under the Vacuum Pump.
4.
Reinstall and tighten the 4-Vacuum Pump mounting bolts so the pump shaft aligns with
the motor shaft.
5.
Slide the drive-coupling flange over the rubber flange sleeve so both halves of the
coupling are snug (not tight) against the rubber flange sleeve and tighten the set screws.
Double check to make sure both coupling set screws are tight.
6.
Wrap the pipe fitting threads with gasoline resistant PTFE tape a maximum or three
revolutions and reinstall the pipe fittings. The 90° fitting must be installed on the back of
the Vacuum Pump, and the straight fitting must be installed on the front.
CAUTION
: Do not use any thread sealing compound when assembling the 45° flare nuts.
CAUTION
: When tightening the 45° flare nuts: Clamp the tube flare between nut and
nose body of the tube by screwing the nut on finger tight. Tighten with a wrench an
additional ¼ turn for a metal-to-metal seal.
7. Re-install the fan guard.
