14 – 18 Repair Manual RRE140/160/180/200/250 © BT
Hydraulic system 6000
Main lift cylinder (6610)
T-code Valid from serial number Date Publication No.
815, 816 6051502 2008-08-21 261828-040
14.5 Main lift cylinder (6610)
General
The instructions below relate to the main lift cylinders in the mast. There
are two main lift cylinders in the mast. The cylinders are of plunger type,
i.e. they are piston-less cylinders.
In the cylinder's hydraulic hose quick change connector there is a hose
rupture valve that prevents the forks from falling in the event of rupture
to a hose.
We recommend that all masts, irrespective of lift height, be lifted of
before the cylinders are removed.
14.5.1 Removing the air cylinder from the
mast
1. From the top, loosen the lift chain next to the lift cylinder to be re-
moved, and lay it out on the floor over the reach carriage.
2. Remove the lifting chain wheel.
3. Undo the lift cylinder from the top beam.
4. Use blocks to chock up both inner runners approximately 50 cm
above the floor.
5. Lower the free lift cylinder to the bottom.
6. Undo the hydraulic hose from the lift cylinder and plug it.
7. Check that the lifting chain that still remains is not damaged.
8. Check that the lifting chain does not get damaged nor damage an-
ything while you raise the mast to the top.
9. Undo the lift cylinder at its bottom stud.
10. Undo the cylinder support at the top.
11. Remove the cylinder from the mast.
14.5.2 Replacing the hose rupture valve
The hose rupture valve is integrated in the quick change connector for
the hydraulic hose.
1. Remove the hydraulic hose from the quick change connector and
plug it.
2. Unscrew the quick change connector from the cylinder.
3. Put a new quick change connector on.
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