14 – 20 Repair Manual RRE140/160/180/200/250 © BT
Hydraulic system 6000
Free lift cylinder (6620)
T-code Valid from serial number Date Publication No.
815, 816 6051502 2008-08-21 261828-040
14.6 Free lift cylinder (6620)
General
The free lift cylinder is the cylinder located in the centre of the cylinders
in the mast. The free lift cylinder is a single-action cylinder.
There is a hose rupture valve fitted in the free lift cylinder that prevents
the load from falling in the event of rupture to a hose.
14.6.1 Removing the free lift cylinder from the
truck
1. Remove the feeder pipe on the free lift cylinder.
2. Plug the free lift cylinder.
3. Loosen the mounting bolts on the top of the free lift cylinder.
4. Lift the intermediate runner using a traverse so that there is slack in
the twin hose and cable.
5. Remove the twin hose and cable from the hose reels on the free lift
cylinder.
6. Chock up under the fork yoke.
7. Lower the traverse so that the fork yoke rests on the block and
there is slack in the free lifting chain.
8. Tie the chains together so that they do not slide out of the upper
chain rollers.
9. Remove the inner split pin on the free lifting chain pin.
10. Remove the free lifting chain pin.
11. Lift the free lifting chain from the free lift cylinder.
12. Remove the chain adjuster from the free lift cylinder.
13. Secure a lifting strap around the free lifting chain bracket by the end
of the free lift piston and a lifting strap around the free lift cylinder
(see diagram).
14. Secure the lifting strap in a traverse.
15. Remove the mounting bolts on the top of the free lift cylinder.
16. Lower the free lift cylinder.
14.6.2 Replacing the hose rupture valve, free
lift cylinder
The hose rupture valve (lowering brake valve) is fitted in the hydraulic
cylinder's pipe connection and can be replaced using standard tools.
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