H0020 Cylinder Overhaul Instructions Threaded Head

Cylinder General overhaul Instructions for:

• Remove cylinder head (gland) by turning anticlockwise (when looking at the cylinder from the rod end)
• Cleanliness is critical, wash all parts and ensure all traces of solvent are removed
• Check seals, rod & bore of tube for any damage
• Piston will need to be removed to change the head seals
• Lightly coat all surfaces with oil. The head & tube contacting surfaces should be lightly greased

For Blind Piston design: (bore diameters 4" and greater)

• The piston nylon lock ring must be replaced every time the piston is removed
• Fit head on to shaft first! (wrap tape around the rod thread to avoid damaging head seals)
• Lightly grease piston thread
• Fit piston by hand and turn until hand tight
• Tighten to 800 to 1000 Nm (you will need approximately a 1.2m extension handle to achieve this)
• Wait for trapped air to escape (approximately 5 seconds)
• Tighten again to 800 to 1000 Nm

1000Nm=85 kg person on a 1.2m extension handle

Do not over tighten head when reassembling (max approximately 200 Nm)

Complete SEAL KITS, which include a replacement SHCS, are available ex-stock from Steelbro. Please quote bore & shaft diameters when ordering (also note the cylinder number, generally stamped by the port, so we can confirm these sizes for you)