DAL-BO MaxiDisc, Manual

Page: 29 / 38

MaxiDisc
Side 29
Changing Wing Fold Cylinders
Fig. 21
When performing repairs, make sure
the MaxiDisc is unfolded and rest-
ing on the ground. Relieve the pres-
sure in the hydraulic system. Dis-
connect the hoses and remove the
cylinders.
After installing a new cylinder, always bleed air out of the system and check
for leaks. Never allow bystanders within the operating radius of the imple-
ment.
Replacing fold/unfold cylinder seals
Fig. 22
Cylinder 80/40X400
1
Empty the oil from the cylinder by carefully moving the cylinder back and
forth.
2 Move the piston to the middle position. Unscrew the gland (pos. 3) from
the cylinder casing (pos. 1). (A special tool is needed to remove the
gland). If the gland is stuck, it may help to warm up the very front of the
socket. When the gland has been unscrewed, pull the piston towards the
gland. Pull the piston rod completely out of the cylinder casing (pos. 1).
3 Remove the self-locking nut (pos. 10) holding the sleeve (pos. 4).
4 Pull the sleeve (pos. 4) off the piston rod (pos. 2).
5 Pull the gland (pos. 3) off the piston rod (pos. 2).
6 Remove the seals from the gland and the sleeve (pos. 5+6+7+8+9).
7 Clean all parts thoroughly. Check for filings, shavings, burrs, and make
sure that there is no rust around the scraper ring (pos. 5) in the gland. If
rust is found, it must be removed.