Detector Protective Barrier - Teledyne 4700 Serivce Manual

Figure 2-19 Improper installation of the gasket
2.3.10 Detector Protective
Barrier
Barrier removal and
replacement
The liquid detector's protective fluoroglass barrier (Figure 2-20)
can be removed for cleaning or replacement. It is anchored by a
hold-down panel on either side.
Note
The piezo film liquid detector is permanently attached to the
pump base. If it is damaged, the entire pump base must be
replaced.
1. Remove the four self-tapping Phillips screws attaching
the hold-down panels and pull them off.
2. Peel the barrier away from the detector.
3. Apply a thin layer of 737 RTV sealant (800-1002-03) to the
outer edges of the mounting surface, taking care to avoid
getting any in the tubing grooves.
4. Install the new barrier, fitting the four inside holes over
the insert guides, as shown in Figure 2-20.
5. Reattach the two hold-down panels, pressing them down
over the insert guides. Torque the self-tapping screws to
7 - 10 in/lbs.
4700 Refrigerated Sampler Service Guide
Section 2 Sample Delivery System
2-15