Read a Zoomlion articulated boom lift's capacity together with its working-envelope restriction and the document applying to the actual machine. Zoomlion's ZA20J catalogue information lists 250 kg unrestricted and 360 kg restricted capacity, but a manufacturer ZA20J manual marked 2022.3 A documents a 250 kg unrestricted rating. A shared model name does not establish that every unit has the higher mode.
These references were checked on 12 October 2026. They are separate published records, not two parts of a single configuration assembled for this comparison.
What does unrestricted or restricted capacity mean?
An unrestricted capacity is associated with the machine's stated unrestricted working envelope. A higher restricted rating applies within a reduced envelope defined for the equipped machine. Neither term means that the maximum height, maximum outreach and largest load can all be combined freely.
Zoomlion's own boom-selection guidance explains this dual-rating distinction. The practical comparison is the permitted platform load at the required work position, not simply the larger number in a brochure.
Provide the work-point height, horizontal distance, obstructions and intended load when asking for a recommendation. Request the relevant reach chart and capacity information for the specific offered configuration.
What do the ZA20J documents actually show?
| Manufacturer reference | Capacity information recorded | Limit to retain |
|---|---|---|
| Global ZA20J product page, corroborated by the Chinese product description | 250 kg unrestricted; 360 kg restricted | Catalogue configuration; confirm applicability to the unit |
| ZA20J Operation and Safety Manual, 2022.3 A, rated-load table | 250 kg, unrestricted range of motion | This table does not establish a 360 kg mode |
The manual also directs the reader to the serial label for maximum rated capacity. The comparison does not establish why the documents differ or authorize using the larger catalogue value on a machine supplied with another rating.
Do not average the entries or replace a capacity label with a figure taken from a different document. Ask the supplier to identify the machine's market specification, production version and matching operating documents before treating a capacity as an ordering fact.
What counts toward the platform load?
The referenced manual states that occupants, equipment and materials must remain within the applicable platform capacity. It also notes that options and accessories can reduce available capacity and must be considered with the total load.
Describe the complete intended load, including tools and any proposed attachments, when comparing machines. A larger platform or a larger catalogue rating does not independently establish how many people or how much material may be carried on a particular unit.
Follow the applicable machine labels, instructions and qualified site assessment. A comparison article cannot establish permission to operate at a particular load or position.
Which identification details should accompany an enquiry?
Request the full model suffix, serial number, year, power configuration, capacity-label photographs and matching manual and reach chart. Keep diesel and electric variants identified separately; a shortened family name can hide a different configuration.
Use our Zoomlion equipment range to identify a starting point, then ask for the actual unit's documentation. State the required load and work geometry so the supplier can check the correct envelope. The catalogue and manual examples above do not confirm stock, condition or the rating of an individual machine.