6-13
Matec Applied Sciences
56 Hudson St., Northborough, MA 01532 Ph: (508) 393-0155 Fax: (508) 393-5476
www.matec.com
e-mail: [email protected]
Removing the Rotor Seal
To remove the rotor seal:
1.
Turn off instrument power and disconnect the power cord.
2.
Remove the CHDF 2000 top front cover.
3.
Leave the injector attached to the front panel of the system, and leave the knob on.
4.
Disconnect the tubing from the back of the injector valve.
5.
Remove the three stator screws.
6.
Pull axially to remove the following items:
•
Stator and stator face assembly (remove together). If the stator face assembly is
damaged, replace it.
•
Stator ring.
7.
Use a flat-blade screwdriver to pry the rotor seal off the four seal pins. Leave the isolation
seal and bearing ring in place.
Reassembling the Injector
To reassemble the injector with a new rotor seal:
1.
Loosen the pressure-adjusting screw one half-turn.
2.
Note the original position of the two red dots.
3.
Orient the rotor seal as shown in Figure 6-11, with the rotor seal slots facing the stator.
Figure 6-11 Rotor Seal Orientation (Viewed from Stator)
4.
Replace the stator ring so that the pin in the 60° stop ring enters the mating hole in the
stator ring.
5.
Install the stator face assembly on the stator. The three pins on the stator face assembly fit
only one way into the mating holes in the stator.
6.
Install the stator and stator face assembly on the injector so that the pin in the stator ring
enters the mating hole in the stator.
7.
Tighten each of the three stator screws a little at a time to keep the stator surface parallel to
the stator ring surface until all parts are held firmly in place.
8.
Retighten the pressure-adjusting screw until the red dots are aligned as you noted them in
step 2.
9.
Replace the knob and tighten the two set screws against the two flat areas on the shaft.
Rotor pin
Notch
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