Overview
The ZF 6073.015.451 EST 37 A is a genuine OEM control unit or valve body assembly specifically engineered for the WG 210 series of powershift transmissions. This critical component manages hydraulic pressure distribution to modulate clutch engagement and gear shifts within the transmission housing. As the electronic-hydraulic interface, it ensures precise shift timing and torque converter lock-up. The SKU 6073.015.451 is a direct replacement part that restores factory shift quality and prevents driveline harshness. It integrates directly with the HOUS.FRONT SECT and the HOUSING REAR PART to form the sealed hydraulic circuit.
Symptoms of Failure
- Erratic or delayed gear engagement: When the EST 37 A wears, hydraulic pressure drops, causing a noticeable lag when shifting from neutral to drive or reverse. This is a common “ZF transmission slow to engage” issue.
- Intermittent transmission slipping under load: Worn solenoids or valve bores inside the 6073.015.451 allow internal leakage, leading to clutch slip during acceleration. Operators often report “WG210 slipping in 3rd gear.”
- Hydraulic fluid contamination or external seepage: Degraded seals on this unit can cause oil to weep from the control body gasket. Look for fluid trails near the TRANSMISSION HOUSING interface.
- Harsh or jarring shift shocks: A failing EST 37 A fails to modulate pressure, resulting in abrupt gear changes that can damage the HOUSING REAR SECTION over time.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 6073.015.451 |
| OEM Reference | EST 37 A (ZF Genuine) |
| Material | Die-cast aluminum alloy with steel valve spools |
| Weight | Approx. 4.2 kg (9.3 lbs) |
| Dimensions | 320 mm x 180 mm x 95 mm |
| Seal Type | NBR (Nitrile) O-rings |
| Operating Pressure | 12–18 bar (174–261 psi) |
| Related Fastener | CAP SCREW (M8 x 25 mm) |
| Related Pin | CYLINDRICAL PIN (alignment) |
Compatibility
This genuine ZF 6073.015.451 EST 37 A is designed primarily for the WG 210 series transmission. It is also compatible with the WG 180, WG 200, and WG 211 variants that share the same hydraulic control architecture. The unit mounts directly to the HOUS.FRONT SECT and interfaces with the HOUSING REAR PART for oil return circuits. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101078 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4657201166 | HOUS.FRONT SECT | Front section housing the torque converter |
| 4657201168 | HOUSING REAR PART | Rear section supporting output shaft |
| 4657298101 | HOUSING REAR SECTION | Extended rear housing for PTO mount |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | M8 fastener for control unit mounting |
| 4656301148 | FIXING PLATE | Retains valve body in position |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic oil |
| 4657301033 | SCREEN SHEET | Secondary filter screen for return line |
| 0636100803 | CAP SCREW | M10 fastener for housing sections |
Frequently Asked Questions
Q: Can the ZF 6073.015.451 be repaired, or must it be replaced?
A: While some internal solenoids can be swapped, the valve body bores wear over time. Replacement with this genuine OEM part is recommended to ensure proper clearances and shift timing.
Q: Is this part compatible with the WG 180 transmission?
A: Yes. The EST 37 A control unit is shared across the WG 180, WG 200, and WG 210 families. Always confirm your transmission’s hydraulic circuit matches the HOUS.FRONT SECT configuration.
Q: What tools are needed to install the 6073.015.451?
A: Standard metric sockets (10mm, 13mm), a torque wrench, and new O-rings. You will also need the CYLINDRICAL PIN for alignment and fresh CAP SCREW fasteners for proper clamping force.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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