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P3100 & P3200 Series
Users Manual
Item
1
2
3
4
PCU Assembly - 2 & 3 mm Nominal Diameters
Piston Disassembly
1. Lift off the weight carrier assembly (1 & 2), and unscrew the piston nut (5). Use the
2. Loosen set screw (3) in piston cap (4), and gently pull the piston cap from the piston.
3. Gently withdraw the piston (8) from the cylinder (6).
Piston Cleaning
4. Use "non-fluffing", non-abrasive, lint-free tissue or absorbent cloth. Hold the piston
5. To remove all traces of contamination (especially important with Water Operated
O-ring seals (where fitted) are Nitrile rubber, and should not be
immersed in solvents, as they will become damaged. They
should be wiped carefully with a new tissue.
6. After removal from the solvent, using a NEW tissue, repeat the cleaning procedure in
7. 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.
8. Wipe excess fluid from the outside surfaces of the cylinder (6).
9. Roll a NEW tissue into a tapered rod of appropriate size. Force the tissue through the
10. Repeat step 9, using a NEW tissue, but from the opposite end of the cylinder.
11. Immerse the cylinder in a suitable, clean solvent, see note in step 5 above.
12. After removal from the solvent, using a NEW tissue, repeat the cleaning procedure in
6-4
Table 6-1. PCU Assembly - 10 mm Parts List
Description
Part
Weight Carrier
Spec
Cylinder
Spec
O Ring
3867553
Support Ring
3918481
dowel hole if the nut is tight. Remove the piston/cylinder assembly.
DO NOT PULL IN SUCH A WAY THAT THE PISTON CAN BEND. The
piston and cylinder assembly (6, 7 & 8) can now be removed from the piston nut.
by the larger "head" end, and rub the tissue back and forth along its length.
Testers), the piston can be cleaned in a suitable solvent.
step 2.
cylinder is cleaned.
cylinder bore whilst rotating. Ensure that the tissue is a tight fit inside the bore so that
dirt and contamination is removed.
step 9 and 10.
Item
Description
5
Piston
6
O Ring
7
LP PCU Body
8
Sump Ring
W Caution
W Caution
Part
Spec
3864802
3921406
3921391
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