GRWT (Shanghai Gerunwan Technology Co., Ltd.) has completed production and shipped a full batch of Doosan port crane spare parts to a major container terminal in Panama. The consignment includes 20 sets of Catenary trolley wheel assemblies and 40 sets of guide roller assemblies, all manufactured to OEM-equivalent specifications for heavy-duty port operations.
The order, placed by Panama Port, covers critical undercarriage and guidance components for Doosan container handling equipment operating at Panama Port . The delivered parts include:
| Item | Part Description | Drawing No. | Quantity |
|---|---|---|---|
| 1 | C-trolley Wheel Ass'y — Catenary Trolley | 2RMQ35-47-0120 | 20 sets |
| 2 | Guide Roller Ass'y (A) — Vertical, 47×159 mm | 2RMQ35-47-0170 | 20 sets |
| 3 | Guide Roller Ass'y (B) — Horizontal, 120×189 mm | 2RMQ35-47-0180 | 20 sets |
All components are engineered for high-load, continuous-duty cycles typical of STS (Ship-to-Shore) and RTG (Rubber-Tyred Gantry) crane operations in tropical maritime environments.
Every assembly underwent full dimensional inspection, surface treatment verification, and functional rotation testing before release. Key quality checkpoints included:
Bearing fit tolerance within ±0.02 mm for smooth rotation under rated load
Hardness testing on wheel treads and roller contact surfaces
Anti-corrosion coating applied to all exposed steel surfaces for salt-air resistance
Pre-assembly torque verification on all bolted joints
To ensure damage-free ocean transit from Shanghai to Panama, the shipment was packed in custom-built plywood crates with individual cardboard compartment separators, foam padding, and PE wrapping for impact absorption. Secured lashing points were provided for safe container loading. Total shipment weight and volume were optimized for a single FCL (Full Container Load) to minimize freight cost and customs handling.
The C-trolley wheels and guide rollers are installed on the crane's trolley traversing mechanism — one of the most heavily stressed subsystems in port crane operation. The wheel assemblies carry the entire trolley, spreader, and container load across the crane span, while the guide rollers maintain precise rail alignment under dynamic wind, sway, and acceleration forces. Downtime of these components directly impacts vessel turnaround time, making reliable spare parts supply critical to terminal productivity.
GRWT is a Shanghai-based supplier of port machinery spare parts, serving container terminals, port operators, and equipment maintenance contractors across Asia, the Middle East, Latin America, and Africa. The company specializes in aftermarket and OEM-equivalent parts for ZPMC, Kalmar, Konecranes, Doosan, Bromma, Stinis, and other major port equipment brands.
GRWT's product range covers crane structural and mechanism parts, hydraulic components, electrical and control systems, spreader parts, and brake systems — all sourced from certified Chinese manufacturers with ISO 9001 quality management systems and full material traceability.
