Pumps manufactured after September 2014 :
Two notches
ease manifold removal with a screwdriver.
5.3 Checking the parts
Piston
301
and cylinder
201
are active parts (wearing
parts). These parts must be replaced if the thickness
measurements are lower than the following values.
When controlling the piston and even if it has not reached
its minimum dimensions, it may show following aspects,
especially on abrasive liquid pumping or low viscosity :
• Triangular shape on top of piston wall (A),
• Small steps at piston wall base (B).
Before putting back the piston on the pump, eliminate
these asperities by filing and finishing with fine sandpaper
(No 320 grain or equivalent), taking care of not scratching
any other surface around. Piston must then look as follows :
Do not retouch any other surface of the piston by
any mean as it can degrade pump performance and
reliability. In particular, do not round or attenuate
disc wall edges.
Even if it shows wearing signs, do not retouch any
surface of the cylinder by any mean as it can degrade
pump performance and reliability.
Minimum measurements (mm)
C125
C250
C500
C800
Piston
301 (P)
New
6
6
6
4
Min.
4,5
4,5
4,5
3
Cylinder
201 (C)
New
19,5
19,5
19,5
23,5
Mini
18
18
18
22
Minimum measurements (inches)
C125
C250
C500
C800
Piston
301 (P)
New
0,236
0,236
0,236
0,157
Min.
0,177
0,177
0,177
0,118
Cylinder
201 (C)
New
0,768
0,768
0,768
0,925
Mini
0,709
0,709
0,709
0,866
5. MAINTENANCE (continued)
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NT 1001-P00 02 19 Pumps Micro C e
