Sourcing for BP Passau (Germany) vs. BP LZZF (Liuzhou)
Expert Sourcing Guide: Key Part Differences Between ZF BP Passau (Germany) and BP LZZF (Liuzhou) Transmissions
Introduction: Not All BP Models Are Created Equal
A critical mistake in the global parts market is assuming all ZF Basicpower (BP) transmissions are identical. There are significant internal differences between the BP Passau (Germany) models and the BP LZZF (Liuzhou ZF, China) variants. Sourcing the wrong version’s components can halt a repair.
As a primary supplier with 20 years of expertise in both imported and China-market transmissions, Tianjin XiaoHang Construction Machinery Co., Ltd. provides this essential guide for distributors.
Section 1: The Most Critical Difference: Electronics (TCU)
EST37A vs. EC4a
This is the most important distinction for procurement:
BP Passau (Germany) Models: Often utilize the EST37A electronic control unit (TCU).
BP LZZF (Liuzhou) Models: Are typically equipped with the EC4a TCU, which features the TCU integrated directly into the hydraulic control unit (HCU) cover.
These systems are electronically incompatible. Ordering the wrong TCU or control valve assembly will not work.
Section 2: Internal Mechanical Variations
Clutches and Bearings
Our 20 years of repair data confirm that internal dimensions also vary:
Clutch Packs: The friction disc diameters are different. For example, the LZZF version may use smaller diameter discs (e.g., D128.0mm) for some clutch packs (CB, CC, CG), whereas the Passau version uses larger diameters (e.g., D148.8mm or D166.5mm) .
Bearings: Key tapered roller bearing sizes differ. For example, the LZZF (BP LZZF) version may use a (60x95x27) bearing for the CC_B shaft, while the Passau version uses a different size.
Section 3: XiaoHang Machinery Co. – Your Expert Sourcing Partner
We Know the Difference
Tianjin XiaoHang Construction Machinery Co., Ltd. is one of China’s most established ZF transmission specialists. We are not just a seller; we are a technical service provider. We understand the specific differences between the Passau and LZZF variants. When you provide us with your transmission’s BOM number, we guarantee you receive the correct, compatible part for that specific build.
Conclusion: Stop Guessing. Start Verifying.
Avoid costly sourcing errors. Trust XiaoHang Machinery Co.’s 20 years of expertise to navigate the complexities of BP Passau and BP LZZF components.
Contact our International Sales Team today for expert verification and competitive quotes.
| Contact Detail | Information |
| Sales Representative | Tony Chang |
| Trading Entity | TIANJIN LINKWORLD TRADING CO. LTD |
| Direct Contact (Phone/WhatsApp) | +86 15822863467 |
| 5858518@gmail.com | |
| Expertise Provided by | Tianjin XiaoHang Construction Machinery Co., Ltd. |