



| PART NUMBER | 1020521468 |
| PART MODEL | ZN101L |
| PART CATALOG | Crane lifting parts |
| APPLICABLE TO | ZOOMLION cranes |
| PART NUMBER | 1020521468 |
| PART MODEL | ZN101L |
| PART CATALOG | Crane lifting parts |
| APPLICABLE TO | ZOOMLION cranes |
| MOQ | 1 PCS |
| STOCK STATUS | In stock |
| GENUINE OR OEM | ZOOMLION genuine parts |
| SHIPPING METHOD | Fedex DHL UPS , SEA, AIR.... |
| PAYMENT METHOD | WESTER UNION, T/T, Alipay, WeChat, WISE |
The Height Limit Switch ZN101L (SAP Code: 1020521468), also commonly known as the Hoisting Limit Switch or A2B (Anti-Two Block) Switch, is a critical safety component designed exclusively for Zoomlion cranes. This genuine spare part is engineered to prevent the hook block from coming into contact with the boom tip, significantly reducing the risk of equipment damage and workplace accidents.
The ZN101L features a high-precision internal contact mechanism that ensures immediate signal transmission when the hoisting limit is reached, effectively stopping the winch to protect the crane boom.
Built to withstand harsh construction environments, the switch housing is sealed against dust and moisture, ensuring stable performance in extreme temperatures and high-humidity conditions.
This switch is a versatile safety solution compatible with a broad range of Zoomlion lifting machinery. Based on authentic SAP integration and technical data, the ZN101L (1020521468) is suitable for the following models:
Genuine Zoomlion parts are manufactured to the highest standards. Unlike aftermarket alternatives, the 1020521468 switch undergoes rigorous factory testing to ensure perfect mechanical and electrical synchronization with your crane’s control system.
We maintain a constant inventory of this essential safety switch to minimize your equipment’s downtime. All parts are verified as 100% Zoomlion Original and are ready for immediate international dispatch.
Ready to secure your operations? Request a quote today!
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Contact our spare parts specialists now for a professional consultation and rapid quotation.
Main boom assembly
D00631178510000000Z
1 00631178510200000 Basic Arm Welding
2 00631178500001010 Sleeve
3 1040100135 Screw M8*20-33H GB72-1988
4 00631148510001010 Plate
5 1040500068 Pin 4*26 GB/T91-2000
6 00631148510001020 Pin Shaft
7 1040200110 Nut M16-8 GB/T6170-2000
8 00633108500001050 Bolt
9 00631258500001040 Upper Slide Block
10 204110014 Lithium-based Grease 8kg
11 00631148520001020 Guard Plate
12 00631148520001030 Spacer Plate
13 00631148510001060 Slide Block
14 00631148520001010 Lower Slide Block (Optional Component)
14 00631148520001050 Lower Slide Block (Optional Component)
15 00631218500001010 Axial Mounting Bracket
16 00631228500001040 Spacer
17 1040000269 Bolt M16*30-8.8 GB/T5783-2000
18 1040300065 Washer 16 GB/T93-1987
19 00631148500001010 Shaft
20 1040000152 Bolt M10*40-8.8 GB/T5783-2000
21 1040300067 Washer 10 GB/T93-1987