Minor Maintenance Kit, Kinney, Rotary Piston, KT500D, Part# 80943100BM

This kit has all the common wear parts you need for routine maintenance. We put this list together based on what usually needs replacement. Here is exactly what you get :

Valves:

• 7 complete Discharge Valve Assemblies (066161)

The discharge valves are very important. They let gas leave the pump cylinder and stop it from flowing back in. Under normal use, the factory says you should replace these valves every year. When your pump is running properly, you should hear a sharp clicking sound. That clicking means the valves are working. No click? Time to check the valves.

Also, note that discharge valves are only sold as complete assemblies. You cannot buy just the spring or just the disc.

Seals:

• 1 Shaft Seal Head Assembly (2 3⁄8) (065217)

• 1 Seal Seat Assembly (065099)

These seals prevent oil leaks and vacuum loss. The shaft seal is critical for keeping oil inside the pump where it belongs.

Gaskets:

• 1 Separator Cover Gasket (807636)

• 1 Valve Deck Cover Gasket (808475)

These gaskets seal the main parts of your pump. Without good gaskets, you get leaks. Leaks mean loss of vacuum.

O-rings:

• 2 Buna O-rings, 110.72 x 3.53 mm (050245)

Buna-N rubber is the right material for vacuum pumps. It resists oil and handles heat well. These O-rings fit in specific grooves to create tight seals.

Backup Rings:

• 1 Backup Ring for Shaft Seal – Kinney (803423)

• 1 Backup Ring for Shaft Seal – Leybold Trivac (803422)

Backup rings support the seals. They stop the O-rings from moving or bending when the pump is under pressure.

Hardware:

• 21 Hex Head Cap Screws (052469)

These are the exact screws you need. No running to the hardware store to find the right size.