DirectFlo DF1400
Chapter 5: Trouble-Shooting and Repair
Comco Inc.
5-9
Issue Date: January 2009
Abrasive Hose
(cont’d)
Cutting and Reinstalling Abrasive Hose
1.
Remove the Handpiece and Hose Assembly by loosening the hose’s connector
nut with a 3/4” wrench.
2.
Pull the connector nut, ground wire and spring back along the hose to a point a
few inches beyond where the hose is to be trimmed and cut the tubing. The
hose ferrules are crimped to the hose and cannot be removed or slid back. They
will need to be replaced with a new ferrule set (ST4209) when re-attaching the
hose to the output connector.
Note: Special attention must be giv
en to cutting the tubing’s end straight,
flat, and perpendicular (square) to the tubing’s centerline. Failure to
cut the tube end correctly will cause premature wear of the hose end
and connector.
4.
Slide the nut and new ferrules onto the tubing end as shown in Fig. 5.8.2a
5.
Insert the tubing end into the PowderGate's output connector and hold the tubing
straight into the fitting with its end firmly seated against the shoulder inside the
fitting.
6.
Slide the ferrules up to the fitting and thread the nut onto the connector finger
tight.
7.
Using a 3/4” open-end wrench, tighten the nut onto the fitting
approximately 1-¼ turns (beyond finger tight). The gap
between the nut and connector hex should be no greater
than 1/8”.
Handpiece and Abrasive Hose Assembly Replacement.
Refer to Appendix B, Figure 8 for drawing of the Handpiece and Hose Assembly.
The complete handpiece and hose assembly (PF2406) includes the handpiece,
handpiece nose, a 7 ft length of polyurethane tubing with the ESD grounding spring
wrapped around it, and a connector nut with ferrules. Replace complete assembly by
disconnecting at PowderGate output.
Tubing Ferrule Assembly
Fig. 5-1a
Connector Nut Gap
Fig. 5-1b
OUTPUT
CONNECTOR
FERRULES
CONNECTOR NUT
1/8” MAX
