Piston Re-Assembly - Fluke P3100 Series User Manual

P3100 & P3200 Series
Users Manual
8. Place piston carefully on a NEW tissue where it will not be damaged while the
Never touch the working surface of a clean piston with bare
fingers—the natural oil in your skin can cause the piston and
cylinder to stick.
9. Wipe excess fluid from the outside surfaces of the cylinder (2).
10. Roll a NEW tissue into a tapered rod of appropriate size. Force the tissue through the
11. Repeat step 10 using a NEW tissue but from the opposite end of the cylinder.
12. Immerse the cylinder in a suitable, clean solvent, see note in step 6 above.
13. After removal from the solvent, using a NEW tissue, repeat the cleaning procedure in

Piston Re-Assembly

14. Replace the clean support ring (4) over the tapered end of the piston, followed by the
15. Holding the piston by the larger "head" end, dip the other end into a container of
16. Carefully introduce the piston into the underside of the cylinder, and push gently
Never force the piston into its cylinder or damage will result.
17. Stand assembly upright on a clean, hard, stable surface. Ensure that the O-ring (3)
18. Ensure that the weight carrier (1) is clean (especially the central mounting hole), and
19. Carefully screw the assembly into the instrument, ensuring that the seal (6) is clean
6-2
cylinder is cleaned.
cylinder bore while rotating. Ensure that the tissue is a tight fit inside the bore so that
dirt and contamination is removed.
step 10 and 11.
O-ring (3). Slide the O-ring to the bottom of the piston so that it holds the support
ring in place.
clean operating fluid, and transfer to the bore in the underside (threaded end) of the
cylinder. Allow the fluid to run through the bore. Repeat this 2 or 3 times to ensure a
good film of clean operating fluid exists in the cylinder bore.
through (the piston will normally slide freely through due to its own weight).
If resistance is felt, introduce more fluid. If resistance continues, re-clean piston,
cylinder or both. If, after repeated cleaning, the piston still will not slide freely within
the cylinder, then permanent damage may have occurred. In which case, the parts
should be returned to the factory for evaluation or replacement.
and support ring (4) are both located centrally around the piston. Push the cylinder
down so that the O-ring is forced evenly inside the support ring.
place on the tapered end of the piston. Tap lightly using the palm of the hand to
locate on the taper.
and undamaged, and correctly re-fitted.
W Caution
W Caution