TRIMAX 520
Page 33
Hydraulic 3D stone control. Replace gaskets
Fig. 22
1.
The cylinder (part no. 77963) is emptied of oil by carefully moving the
piston (pos. 3) back and forth.
2.
Move the piston (pos. 3) to the middle position, then unscrew the end cap
(pos. 1) from the cylinder tube (pos. 2). A special tool must be used to
remove the cap. If the cap (pos. 1) is stuck, it may help to slightly warm up
the front of the valve. When the cap (pos. 1) is unscrewed from the cylinder
tube (pos. 2), pull the piston rod (pos. 3) out of the cylinder tube (pos. 2).
3.
The piston (pos. 3)misc pulled back out of the cap (pos. 1), and next the
joint packing set in the cap can be accessed (pos. 1).
4.
The gaskets are removed.
5.
All parts are cleaned and checked for chips, burrs etc. Check for rust
around the scraper ring in the cap (pos. 1). If this is the case, remove it.
Also, the piston rod (pos. 3) must be completely clean.
Mounting
1.
New seals are mounted in the cap (pos. 1) and the piston rod (pos. 3).
2.
The thread on the cap (pos. 1) and the cylinder tube (pos. 3) are lubricated
with hydraulic oil to ease the mounting.
3.
The cap (pos. 1) is mounted with the piston rod (pos. 3) by pushing the
piston rod through the cap.
4.
Grease the cylinder tube (pos. 2) with hydraulic oil on the inside and push
in the piston rod (pos. 3) unto the middle position.
5.
Screw on the cap (pos. 1) and tighten. A special tool must be used to
remove the cap.
6.
The cylinder is installed. The hoses are installed. Make sure that the hoses
are nor being squeezed and that the connections are tight.
1
2
3