1249
Model Code Page
90. Hydraulic system
8. 11. 1990
6000--8750 912 3
2. Lifting cylinders
A. Changing lifting cylinder seals
1. Disconnect the lift cylinder press ur e lines and remove the
cylinder.
2. Take out the circlip and backing ring of the cover.
3. Knockthe cover into the cylinder until theo---ring and circlip
of the cover inside the cylinder can be removed.
4. Pull the cover and piston out of the cylinder with a sharp
movement.
5. Remove the sealing ring of the piston (cut off with a knife),
the o---ring and guide ring. Remove the piston from the piston
rod.
Note! Removal of the piston is facilitated by heating it up so
that the locking fluid on the threads melts.
6. Remove the cover from the piston rod and the seals from
the cover.
7. Squeeze the new seal as sho wn in the figure and press it
into its groove (sealing lip downwards). Fit the piston rod o il
stripper.
8. Change the o---ring and backing ring of the cover.
9. Place the circlip and backing ring on the piston rod. Grease
the inside seals of the cover and push the cover on the piston
rod.
10. Fit the piston on the piston rod. Use locking fluid Loctite
270 on the threads. The piston nut tightening torque is 150
Nm
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