
CD3 Products Manual
CD3, General Benefit Corporation |
| 612.467.9441
Patent
Pending | Made in USA | © 2019
35
4.1.2 Vacuum Pressure Relief Valve
The vacuum tank is equipped with a pressure relief
valve to regulate the amount of tank vacuum that
can be attained in a blocked hose scenario. This
keeps the motor from being harmed from surging
due to lack of air flow. For this reason, it is
important to monitor the function of this valve and
maintain the proper setting. The valve should be set
so that when the vacuum hose is completely blocked
the valve actuates just as the vacuum motor begins
to surge. (See also maintenance schedule - sec. 4.9)
The valve is adjusted with a set nut on the threaded spindle sticking up from it. Turning
the nut clockwise will make it open at a later/higher tank vacuum point. Turning the nut
counterclockwise will make the valve open at a sooner/lower tank vacuum point. The
second nut is to lock the position of the bottom nut in place.
4.1.3 Inspect Hose
The vacuum hose should be checked on a regular basis for cracks, breakage, clogs or
other damage. The performance of the vacuum system is heavily dependent on the
hose condition. While it is a very robust hose it is very vulnerable to damage due its size
and inherent user disregard for its well-being. (See also maintenance schedule - sec.
4.9)