SINOTRUK HOWO Planetary Gear Assembly – Model 199114250109 | OEM Replacement Planet Carrier Unit for HOWO Axle & Reduction Gearbox

Genuine-spec planetary gear assembly (199114250109) for SINOTRUK HOWO trucks — durable planet carrier with full set of planet gears and bearings, designed for rear axle double-reduction systems.

OEM Part Number199114250109
Common Replaces HC19-4105010, HC16-4105010 (Planet Carrier Assembly)
Application Rear axle double reduction hub (HC19, HC20 series) in SINOTRUK HOWO A7, T7H, ST, HOHMAN models
Assembly Includes Planet carrier housing, 4x planet gears (satellite gears), needle roller bearings, thrust washers, retaining snap rings
Number of Planet Gears 4
Planet Gear Teeth Count 18 teeth
Sun Gear Compatibility Matches sun gear 199114240079 (input pinion from main differential)
Ring Gear Type Internal tooth ring gear fixed within wheel hub (stationary ring)
Gear Material 20CrMnTiH alloy steel (carburizing grade)
Heat Treatment Carburized & hardened (surface: HRC 58–62, core: HRC 35–40)
Bearing Type High-load capacity needle roller bearings (INA-type equivalent)
Load Capacity Designed for 16T–20T axle loads under continuous heavy-duty operation
Operating RPM Up to 1,200 rpm (typical in downhill engine braking mode)
Lubrication Requirement Immersed in GL-5 85W-140 gear oil inside wheel hub cavity
Typical Failure SignsWhining noise during deceleration, oil leakage from hub, uneven tire wear