ZF 0637.100.521 UNION SCREW
ZF Part Number: 0637.100.521 (also written as 0637100521 / 0637.100.521 / 0637 100 521)
OEM Cross Reference / Interchange Numbers
ZF 0637.100.521 (UNION SCREW) is the original manufacturer part. The following OEM and third-party part numbers are direct cross-references:
| Brand / OEM | Part Number | Type |
|---|---|---|
| 柳工 | SP146299 | OEM Cross Ref |
If you are looking for 柳工 SP146299, the correct ZF original part number is 0637.100.521. This is a 100% genuine ZF replacement, guaranteed to be fully compatible with 柳工 equipment that uses ZF transmissions.
Compatible ZF Transmission Models
This union screw is used in the following ZF transmission models:
- ZF 3 WG 191
- ZF 3 WG 200
- ZF 3 WG 201
- ZF 3 WG 211
- ZF 3 WG 251
- ZF 4 WG 150
- ZF 4 WG 158
- ZF 4 WG 180
- ZF 4 WG 180(555)
- ZF 4 WG 181
- ZF 4 WG 191
- ZF 4 WG 200
- ZF 4 WG 200(555)
- ZF 4 WG 200(555/5)
- ZF 4 WG 208
…and 23 additional models. Contact us to confirm fitment for your specific unit.
Part Location in Assembly
| Section | Position No. | Qty |
|---|---|---|
| Control Unit | 050 | 1 |
| Control Unit | 060 | 1 |
| Countershaft | 260 | 1 |
| Disconnection | 590 | 2 |
| Oil Pipe | 21.310 | 1 |
| Oil Pipe | 21.318 | 1 |
| Oil Pipe | 21.340 | 2 |
| Oil Pipe | 21.430 | 1 |
| Oil Pipe | 21.690 | 1 |
| Oil Pipe | 270 | 1 |
| Oil Pipe | 310 | 1 |
| Oil Pipe | 315 | 1 |
Related Parts in Same Assembly
- 0501.215.886 — BRAKE (Qty: 2)
- 0501.222.007 — VALVE BLOCK (Qty: 1)
- 0750.117.075 — TAPER ROLLER BEARING (Qty: 2)
- 2093.206.002 — GEARSHIFT SHAFT (Qty: 1)
- 2093.229.004 — BRACKET (Qty: 1)
- 2093.240.001 — LIFTING SHAFT (Qty: 1)
- 2093.298.147 — HOUSING (Qty: 1)
- 2093.298.163 — REPAIR KIT (Qty: 1)
Frequently Asked Questions
What is ZF part number 0637.100.521?
ZF 0637.100.521 is an OEM union screw produced by ZF Friedrichshafen AG, one of the world’s largest automotive suppliers. It is designed for use in ZF powershift transmissions, specifically in models such as 3 WG 191, 3 WG 200, 3 WG 201, 3 WG 211, 3 WG 251. This is a genuine ZF component, not an aftermarket reproduction.
Which ZF transmissions use 0637.100.521?
This union screw is found in 38 ZF transmission variants, including: 3 WG 191, 3 WG 200, 3 WG 201, 3 WG 211, 3 WG 251, 4 WG 150, 4 WG 158, 4 WG 180, 4 WG 180(555), 4 WG 181. These transmissions are commonly used in wheel loaders, graders, and other heavy construction equipment. Contact us to verify fitment for your specific machine.
Where is ZF 0637.100.521 installed in the transmission?
This union screw is located in the p.t.o. shaft area of the transmission. It appears in 30 different assembly configurations. In the service manual, look for position number 050 in the Control Unit section.
How do I look up ZF part 0637.100.521?
This part can be found under several formats: 0637100521 / 0637.100.521 / 0637 100 521. All formats refer to the same genuine ZF component. When ordering, any of these numbers will work. The official ZF catalog uses the dotted format (0637.100.521).
Where can I buy ZF 0637.100.521?
You can purchase genuine ZF 0637.100.521 from PartsZF.com (operated by Tianjin Xiaohang Construction Machinery Co., Ltd). We maintain direct supply channels with ZF and offer worldwide shipping. Contact our parts specialists for current pricing and lead times.
Need this part? Contact our ZF parts specialist for pricing and availability. We ship worldwide with OEM quality guarantee.
Exploded View / Assembly Diagram
The diagram below shows where ZF 0637.100.521 is located within the transmission assembly.
