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WG9319313250 China High Quality Sinotruk HOWO Truck Cross-axis Universal Joint Engine Parts for Sale

WG9319313250 China High Quality Sinotruk HOWO Truck Cross-axis Universal Joint Engine Parts for Sale

The WG9319313250 is a high-strength universal joint assembly (U-joint) used in the driveline system of heavy-duty trucks manufactured by SINOTRUK (China National Heavy Duty Truck Group). Commonly referred to as a "cross shaft" or "driveshaft cross," this component connects two transmission shafts at an angle, allowing smooth torque transfer despite angular misalignment.

Designed for durability under extreme loads and continuous operation, it plays a critical role in maintaining drivetrain integrity, especially in off-road, mining, and long-haul applications. The 2025 improved version features enhanced sealing, lubrication efficiency, and fatigue resistance.

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Model:
WG9319313250
Brand:
Sinotruk HOWO

Product Description

Attribute	Description
Official Name	Universal Joint Assembly (Improved Type) / Cross Shaft
Common Name	U-Joint, Driveshaft Cross, Cardan Joint
OEM Brand	SINOTRUK (China National Heavy Duty Truck Group)
Part Number	WG9319313250
Alternative Numbers	WG9319313210, 991.1431.0082, 19036311080, AZ9112311250
Origin	Jinan, Shandong Province, China
Material	Alloy structural steel: 20CrMnTi (carburized & hardened)
Weight	Approx. 2.5 kg (complete assembly); individual components range from 0.65–2.5 kg depending on configuration
Design Type	Needle roller bearing with grease nipple (lubrication fitting)
Sealing	Double-lip rubber seals to prevent dust/water ingress

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Installation Instructions

✅ Pre-Installation Checks

Verify correct part: Confirm WG9319313250 matches the original unit.
Inspect for damage: Check bearing cups, seals, and grease nipples.
Ensure cleanliness: Remove dirt, rust, or old grease from yoke bores.
Use proper tools: Never use hammers directly on bearing cups.

✅ Step-by-Step Installation

Align Yokes: Position both ends of the driveshaft so that the yokes are in phase (alignment marks aligned).
Press in Bearing Cups: Use a hydraulic press or专用 U-joint installer tool to press each bearing cup into the yoke fork.

Do NOT strike with hammer — risk of damaging needles or seals.

Install Cross Shaft: Insert the cruciform core into the yoke forks.
Secure Ends: Fully seat all four bearing caps until snap rings are properly engaged.
Grease Nipple Orientation: Rotate the joint so that all grease fittings face inward toward the center of the driveshaft — ensures accessibility and prevents damage during operation.
Initial Lubrication: Pump extreme-pressure lithium-based grease through each nipple until fresh grease emerges from the edges.
Final Inspection: Rotate the joint manually — should move smoothly without binding or play.