DAL-BO PowerRoll 1030 Manual page 19

Replacing the hydraulic sealings:
REMOVAL:
1. Drain the oil out of the ram (if necessary use compressed air to move the
piston forward and back to force the oil out.
2. Run the piston into middle position. Unscrew the top (pos. 11) 30 mm.
If the top is sitting very tight, this can be remedied by heating the front of
the sleeve to approx. 300°C and then cooling it gently. Once the top has
been screwed out, pull the piston out towards the top, then screw the top
right off and remove the piston.
3. Remove the sleeve shoe (pos. 6).
4. Pull the top off the piston rod (pos.1).
5. Remove the packings from the top and sleeve shoe (pos. 5 + 7 + 9 + 10 +
12 + 13) - use an awl or screwdriver if necessary).
6. Clean all the parts and check for shavings, burrs, etc. Check whether
there is any rust around the oil ring (pos. 13) in the top. If there is, it must
be removed.
Fig. 13:
ASSEMBLY:
1. Fit new packings in the top and sleeve shoe. Fit the oil ring (pos. 13)
using a piece of pipe which fits round the outside of the lip (or a special
mandrel. Fit the sleeve (pos. 3) on the sleeve shoe using a round
bar/screwdriver.
2. Lubricate the thread on the top and the ram sleeve with grease (corrosion-
preventing anti-seizing agent.
3. Fit the top (pos. 11) on the piston rod.
4. Fit the sleeve shoe (pos. 6) and lock with Loctite. Make sure that the
thread is completely clean and free from oil and other impurities before
using Loctite.
Oil must not be put in for 12 hours after using Loctite.
5. Lubricate the sleeve (pos. 6) on the sleeve shoe and the inside of the far
end of the ram sleeve with lubricating oil, then push the piston into
middle position.
6. Screw the top (pos. 11) on and tighten.
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