Defender 500 |
15
www.natvac.com | 800.253.5500
Cause
Correction
Change-over lever in neutral position
Place lever in correct position
as
shown�
Worn sliding-vanes
Replace the vanes
Loose check-valve
Replace the valve
Worn lip seals
Replace the seals
Blocked vacuum pump
See previous instructions
Leaking of the gate-valves on the tank Tighten the valves
Leaking of the seals on the tank
Repair or replace the seals
Primary shut-off blocked
Dismount and clean the parts
Clogged connecting pipeline
Clean the metal pipelines or
replace
the
rubber
ones�
No vacuum _______________________________________________________
