Pump Tube Replacement - Teledyne 4700 Pocket Manual

4700 Refrigerated Sampler
ent unless you flex or squeeze the tubing. If
cracks or excessive wear are evident, replace
the pump tube (section 5.1.2).
Pump Rotor – Look for debris build-up on
the pump roller or guide surfaces (Figure
5-2). Clean when needed (section 5.1.3).
Housing – Look for debris inside the pump
housing. Clean as necessary (section 5.1.4).
(Debris inside the housing is usually evi-
dence that a pump tube failed.)
Figure 5-2 Rollers (A) and guides (B) on the

5.1.2 Pump Tube Replacement

The correct sampler pump tubing is easily
recognized by the blue alignment collars. Pump
tubing from non-Isco vendors and tubes
designed for other types of samplers should not
5-4
A
B
A
pump rotor
B