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5.2
Mechanical
5.2.1
Changing Cylinder/Piston Assembly
To replace the cylinder/piston assembly proceed as follows:
Run the pump until the piston is at a rearward position, that is, away from the
A.
valve block. Using the 3 mm Allen wrench provided, remove the two screws
(18, see Figure 6 "Cylinder/Piston Assembly"), accessible from the air port
side, which fasten the cylinder to the valve block.
Pull the cylinder outward to detach it from the valve block, about 0.5cm. The
cylinder may require a gentle side knock to pop out, as grease film on its bot-
tom may cause it to stick, especially after long inactivity of the pump.
All cylinder/piston units require an identical sequence of moves to be separat-
ed from the pump mechanism.
However, the 30ml cylinder, having a larger bottom surface, may require a
more energetic knock to separate it from the block. However we recommend
avoiding a Karate chop: repeated tapping may be more effective and less
dangerous to the cylinder integrity.
7025 Instruction Manual (Rev. 2)
Figure 6 "Cylinder/Piston Assembly"
Page 9
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