The correct tightness prevents the chains from overloading and wearing out too quickly. Correct
adjusted chains will also not jump off the grove in the roller.
1.
Retract the extensions. Lower the grapple to the ground.
2.
Loosen the adjustment screw of the top chain fastener until the chain is visibly loose.
3.
Tighten the adjustment screw of the bottom chain. Extension 2 will retract until the extensions
come in contact with each other. Check that the top chain is still loose. Loosen the adjustment
screw of the bottom fastener until a small gap is created between the nut and the second
boom and extra chain tension is removed.
4.
Raise the 2nd boom until it is level and keep the grapple near the ground. Extend the
extensions. Slightly retract the extensions (2 to 5 cm) to loosen the top chain. Leave the 2nd
boom in the air to avoid the top chain from tighten.
5.
Tighten the top chain with the adjustment screw. The correct tension is achieved when it is
possible to move the chain vertically about 1.5 to 3 cm from its center by hand.
6.
Check the chain adjustments by extending and retracting the extensions a couple of times.
8.4. Lubrication
WARNING
Follow the lubrication schedule exactly. If you do not do so, you can cause serious
damage to the crane and to add-on equipment.
Type of grease
Use lithium based grease containing EP additives (consistencies 2 and 3 are recommended,
depending on the climate).
Recommended greases:
BP LS EP 2, ESSO UNIWAY EP2 N, AGIP GR MU/EP3, NYNÄS UNIFETT EP.
NOTE
Avoid grease with graphite or molybdenum-disulphide additives.
Maintenance and Service
Jonsered 1250RZ -1500RZ R CE
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