National Vacuum Equipment 887 Challenger Series, Руководство пользователя, Страница: 21 / 32

887 Challenger Series | 21 www.natvac.com | 800.253.5500
Checking Vane Wear
The sliding vanes in the 887 are made of a very durable Kevlar material.
Their wear and related estimated useful life are dependent on many
factors, such as RPM, operating vacuum/pressure level, type of material
being pumped and hours of service. We recommend at least an annual
inspection of the vanes which can be easily accessed thru the intake filter
housing, once filter is removed.
• Be sure the pump is cool and that drive system is off so it cannot
accidently engage.
- Think Safety!
• Remove the four knobs on top of the filter housing.
• Lift off the filter cover .
• Remove final filter assembly from its pilot.
• Using a probe, determine the amount of vane wear, noting that a new
vane is roughly flush with the outside diameter of the rotor (i.e. a new
vane fills a vane slot completely). If the vane is recessed (worn) more
than a ¼” into the slot it is time to replace all of them.
• Vanes should be replaced in sets and it’s always a good idea to have an
extra set of vanes on hand for emergencies.
• Be sure O-Ring remains in filter cover during reassembly.
Checking Vane Wear________________________________________________________________
We recommend checking vane wear at least every 12 months.
•
Be sure the pump is cool and that drive system is off (cannot accidently engage)
- Think Safety!
•
Remove the four knobs on top of the filter housing
•
Lift off the filter cover
•
Remove final filter assembly from its pilot
•
Reach down to the rotor to feel the vanes
- A slide ruler can also be used to measure the wear of the vane
•
A new vane is flush with the outside
diameter of the rotor.
•
If any of the seven vanes is over ¼”
below the outside diameter of the
rotor, it’s time to replace the vanes
•
Vanes should be replaced is sets
and it’s always a good idea to have
an extra set of vanes on hand for
emergencies.
•
Be sure O-Ring remains in filter
cover during reassembly
VANE ANALYSIS TRACKING SHEET
DATE
WEAR
(IN)
REPLACEMENT? COMMENTS
FINAL FILTER
ASSEMBLY
FILTER COVER
Maintenance _____________________________________________________