DirectFlo DF1400
Chapter 5: Trouble-Shooting and Repair
Comco Inc.
5-11
Issue Date: January 2009
DirectFlo Internal Parts
Accessing parts within the DirectFlo requires removing the protective cover. Follow
these directions in order to safely remove the cover.
1.
Turn the Power OFF and unplug the unit.
2.
Loosen, but do not remove, the four (4) screws that hold the cover in
place. Lift the cover off the DirectFlo.
NOTE:
If necessary, you may turn on and pressurize the unit with the cover removed.
However, be sure that the tank cover and all air hoses are securely in place.
CAUTION
:
There is High Voltage at the Terminal Block!!
3.
To install the cover, set it in place with the screw slots aligned with screws
in chassis.
4.
Make sure the lock washers are on the outside surface of the cover.
Tighten the screws to hold the cover in place.
Hose Failure at the Vent Pinch
During unit pressurization and depressurization the hose pinch will open and close. This
action weakens the hose at the squeeze point and leads to eventual hose failure. Refer
to Chapter 4 of this manual, “Maintenance”, for detailed information on reducing this type
of failure.
If for some reason the pinch does not close tightly enough to completely seal the hose, a
very slight leak can rapidly wear through the hose and cause it to leak. Should this
occur, the pinch must be examined and the problem corrected. See: “Repairing the
Pinch Valve and Cylinder” below.
Pinch Tube and Plunger
The pinch and plunger are the parts of the pinch assembly that make contact with the
hose. Hoses can sometimes develop leaks at the point where they are pinched. Leakage
of abrasive at these points can cut into the pinch tube and plunger causing sharp edges
that damage hoses. Inspect the pinch and plunger on a regular basis (see Table 4-1,
“Maintenance Intervals”) for pitting and sharp edges. Abnormal hose breakage, always at
the pinch, is an indication of pinch or plunger damage.
