1522382 Sun Gear | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo 26-tooth sun gear for selected heavy-vehicle planetary hub-reduction axles. The internally splined gear transfers axle-shaft torque into the planetary gears, producing the final hub reduction at the wheel end. Axle model, tooth count, spline profile and overall dimensions must all be checked.

🚤 Compatibility

• Year Range: Approximately 1970s - 2010s

⚙️ Key Features

• Genuine Volvo 26-tooth hub-reduction sun gear
• Correct Volvo part number 1522382
• Planetary final-drive gear for heavy rear axles
• Used with spring washer 1522338
• Engine type: Volvo / Renault heavy-duty planetary rear axle

🔌 Function

The sun gear receives torque from the axle shaft and drives the planetary pinions to create the wheel-end reduction ratio.

⚠️ Common Signs of Failure

• Hub reduction produces whining, clicking or grinding noise
• Gear teeth become pitted, chipped or spalled
• Internal splines wear and create backlash
• Metal particles appear in hub oil
• Planetary gear contact pattern is abnormal

🛠️ Service Notes

• Work absolutely clean — a gear set is ruined by grit, so wash the parts in clean solvent, dry them without fibrous rag and keep the assembly covered while you work
• Inspect the mating gears, bearings, thrust faces and any clutch parts at the same time; a sun gear rarely wears alone, and reusing damaged partners will destroy the new one
• Check the new gear's tooth flanks for handling damage, and the shaft splines and bearing seats for pick-up or scoring, before anything goes together
• Follow the workshop manual for your engine on shimming, endfloat and backlash rather than building to feel, and fit new seals, gaskets and locking devices throughout
• Pre-lubricate on assembly, refill with the oil grade the manual specifies, then turn the unit through by hand and check for tight spots before running it up and rechecking the level

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21249925 / 7421249925 recognised later heavy-vehicle cross-references where specified

OEM / Related Numbers

• 21249925 related reference
• 7421249925 related reference
• 1522338 related spring washer
• 1522393 related thrust shim

Aftermarket / Verified Equivalents

• ATP: SG-82
• DT Spare Parts 2.35034
• EuroRicambi: 88170211

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging