Overview
The ZF 5838.300.100 PRESSURE LINE is a critical hydraulic component engineered for heavy-duty construction machinery transmissions. This OEM genuine part serves as the primary conduit for pressurized transmission fluid, directing oil flow from the pump to the valve body and clutch packs within the transmission housing. Positioned along the main control circuit, the pressure line ensures consistent hydraulic force is delivered to engage gears and maintain torque converter lock-up. The SKU 5838.300.100 is precision-machined to withstand extreme internal pressures and thermal cycling common in excavators, wheel loaders, and graders. When installed alongside a 5838109012: DIFFERENTIAL or a 5838300626: DIFFERENTIAL HOUSING, this pressure line completes the hydraulic circuit necessary for reliable power transfer.
Symptoms of Failure
- Transmission fluid leaks at line fittings: Cracks or corrosion on the pressure line cause visible oil drips near the transmission pan or bell housing, leading to low fluid levels and eventual gear slippage.
- Delayed or harsh gear engagement: A compromised pressure line reduces hydraulic flow, resulting in sluggish shifts or abrupt clutch application during acceleration.
- Overheating transmission oil: Restricted flow through a damaged line forces the pump to work harder, generating excess heat and triggering warning lights on the dashboard.
- Erratic torque converter lock-up: Insufficient line pressure prevents proper converter clutch engagement, causing shuddering or RPM flare at highway speeds.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 5838.300.100 |
| OEM Reference | ZF 5838.300.100 |
| Material | High-tensile steel with anti-corrosion coating |
| Length (approx.) | 320 mm |
| Outer Diameter | 18 mm |
| Wall Thickness | 2.5 mm |
| Weight | 0.45 kg |
| Max Operating Pressure | 25 bar (360 psi) |
| Thread Type | M16 x 1.5 (both ends) |
Compatibility
This pressure line is designed for ZF WG series transmissions commonly used in construction machinery. Compatible models include WG180, WG200, WG211, and WG250 series. It also fits select ZF 4WG-200 and 6WG-200 variants found in Volvo, Caterpillar, and Komatsu equipment. For optimal sealing, pair this line with a 0750117075: TAPER ROLLER BEARING and a 2093209023: DIFFERENTIAL to maintain driveline integrity.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque between axles |
| 0750117075 | TAPER ROLLER BEARING | Supports rotating shafts under load |
| 2093209023 | DIFFERENTIAL | Allows wheel speed variation during turns |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gears |
| 0631329088 | SPRING PIN | Secures linkage assemblies |
| 5838300811 | THRUST WASHER | Reduces axial friction |
| 5838300721 | AXLE BEVEL GEAR | Transfers power at right angles |
| 5838300633 | AXLE | Transmits rotational force to wheels |
| 5838300753 | THRUST WASHER | Prevents axial play in gear sets |
| 5838300818 | THRUST WASHER | Controls end float in differential |
Frequently Asked Questions
Q: Can I replace the ZF 5838.300.100 pressure line without removing the transmission?
A: Yes, in most cases the line is accessible from the underside of the vehicle after draining the transmission fluid. However, on compact machinery, partial removal of the crossmember may be required.
Q: What torque should I apply to the fittings on this pressure line?
A: ZF recommends 35 Nm (26 ft-lbs) for the M16 x 1.5 fittings. Over-tightening can distort the sealing surface and cause leaks.
Q: Does this part come with O-rings or sealing washers?
A: The 5838.300.100 is supplied as a bare line. We recommend replacing all copper washers and O-rings at the connection points during installation to prevent future leaks.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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