OPERATION & MAINTENANCE
4.9
allowing it to fall to the floor.
10.Retract the hydraulic cylinder and insert a 4x4" about 50" long and extend the
cylinder. Be sure to keep all hands and tools clear of the cylinder while doing this
operation. Do not allow the board to jam or otherwise catch in the cylinder be
cause the hydraulic cylinder will break it.
11.Carefully lower piston assembly to the floor and stand it vertically on the floor
with the coupling side up.
12.Remove the setscrews in the sleeve retainer.
13.Remove the sleeve retainer.
14.Slide sleeve off.
15.Install the new sleeve with the chamfered end toward the coupling end.
16.Inspect the piston head and cylinder for signs of metal on metal contact. If the
grooves are rusting or are generating flakes, both the piston and the tube will
have to be replaced.
17.If the piston and cylinder are acceptable, then install the piston into the cylinder.
18.When replacing the piston sleeve, the cold end seal should be replaced at the
same time.
19.Thread an eye bolt into the rear of the piston and attach a chain.
20.Attach the chain to the hydraulic cylinder.
21.Keep all hands and tools clear of the webb plates while performing this operation.
Have an assistant carefully retract the piston far enough to get it past the seal and
allow the coupling to be attached.
22.Install the coupling.
23.Install the webb plate cover.
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