Zoomlion Crane Hoist Wire Rope

Main and auxiliary hoist wire rope for Zoomlion truck cranes, quoted from the rope actually on the drum. Zoomlion's QY25V brochure gives the duty the rope works at but not its diameter: 135 m/min on the main winch and 100 m/min on the auxiliary, both measured at the third layer on the drum, with the 25 t hook block reeved on 8 parts of line at the 10.3 m base boom and down to 3 parts at the full 38.5 m, and the 3 t hook on the 8 m jib running on a single line. That reeving table is why length cannot be guessed from tonnage: full-height work on few parts and short-boom work on eight both have to be covered by the rope on the drum, and the auxiliary rope is a separate length again. Because the brochure does not publish the diameter or the construction, we do not quote from a catalogue figure. Send the tag or certificate from the old reel, or measure the diameter across the crowns of the strands on an unworn section near the drum anchor, and tell us the length you need and whether it is the main or the auxiliary rope. Hoist ropes on telescopic cranes are rotation-resistant constructions, and a same-diameter rope of another construction can let the hook block spin under load. The same rule applies on the ZTC250V and the ZTC550V — the 55 t crane carries more than twice the base boom moment, and its rope, sheaves and hook block are grooved a size up. Replace against the discard criteria in the operator manual, and check the sheave grooves while the rope is off.