
Product Introduction
The 0059978447 / 0099978846 Oil Seal is an important sealing component used in the rear suspension system of Mercedes-Benz NG, SK, MK series and Beiben NG80 trucks. Installed around the suspension saddle and balance shaft connection area, it prevents grease leakage, reduces contamination entering the pivot system, and helps maintain smooth suspension movement.
Manufactured according to OEM specifications, this oil seal features excellent elasticity, wear resistance, and dimensional accuracy. It is widely used for rear suspension maintenance, balance shaft repair, and chassis overhaul applications for heavy-duty commercial trucks.

Technical Specifications
| Item | Specification |
| Product Name | Oil Seal / Sealing Ring |
| OEM Part Number | 0059978447 / 0099978846 |
| Alternative OEM Number | A0059978447 / A0099978846 |
| Vehicle Brand | Mercedes-Benz / Beiben |
| Compatible Models | NG / SK / MK / NG80 |
| System | Chassis & Suspension System |
| Component Type | Suspension Saddle Oil Seal |
| Position | Rear Bogie Suspension System |
| Inner Diameter | Approx. 170 mm |
| Outer Diameter | Approx. 190 mm |
| Thickness | Approx. 8.5 mm |
| Material | NBR Rubber |
| Manufacturing Process | Rubber Molding + Precision Forming |
| Function | Prevents Oil Leakage & Protects Pivot Components |
| Condition | Brand New |
| OEM Standard | Yes |
| Quality Test | Size / Sealing Performance / Material / Fitment Tested |
| Installation | OEM Direct Replacement |
| Packaging | Export Standard Packaging |
| Origin | China |
Vehicle Fitment
| Vehicle Brand | Compatible Models |
| Mercedes-Benz | NG Series |
| Mercedes-Benz | SK Series |
| Mercedes-Benz | MK Series |
| Beiben | NG80 |
Payment & Shipping
| Category | Options |
| Payment Methods | T/T, PayPal, Western Union, MoneyGram, L/C, Alibaba Trade Assurance |
| Shipping Methods | DHL, FedEx, UPS, TNT |
| Delivery Time | 3–7 Days (Express), 20–45 Days (Sea Freight) |
| Trade Terms | EXW, FOB, CIF, CFR, DDP |
| Shipping Scope | Worldwide Shipping |
Related Products Categories
| Section/System | Common Spare Parts |
| Cylinder Block & Cylinder Head | Cylinder Block, Cylinder Head, Cylinder Liner, Piston, Piston Ring, Cylinder Head Gasket |
| Crankshaft System | Crankshaft, Connecting Rod, Bearing, Thrust Washer |
| Valve Train | Intake Valve, Exhaust Valve, Camshaft, Rocker Arm, Valve Spring |
| Fuel System | Injector, Fuel Pump, Fuel Filter |
| Cooling System | Water Pump, Thermostat, Radiator |
| Lubrication System | Oil Pump, Oil Cooler |
Transmission & Drivetrain Parts
| Section/System | Common Spare Parts |
| Clutch System | Clutch Disc, Pressure Plate, Release Bearing |
| Gearbox System | Gearbox Assembly, Gear Set, Bearing, Seal |
| Differential System | Differential Assembly, Crown Wheel & Pinion, Differential Bearing |
| Driveshaft System | Propeller Shaft, Universal Joint, Drive Shaft Center Bearing, Slip Yoke, Center Support |
| Axle System | Axle Shaft, Wheel Hub, Planetary Gear, Side Gear |
| Section/System | Common Spare Parts |
| Front Axle | Steering Knuckle, Kingpin Kit, Tie Rod, Wheel Hub |
| Rear Axle | Axle Housing, Hub, Differential Housing |
| Suspension System | Oil Seal, Thrust Ring, Torque Rod, Torque Rod Repair Kit, Spring Shackle, Spring Bracket, Leaf Spring Seat, Balance Shaft, Equalizer Beam, Suspension Saddle, Console Bracket, Leaf Spring, Shock Absorber, U-bolt |
| Steering System | Steering Gearbox, Drag Link, Steering Pump |
| Brake System | Brake Drum, Brake Shoe, Brake Chamber, Brake Valve, Brake Caliper, Slack Adjuster |
Cabin & Body Parts
| Section/System | Common Spare Parts |
| Cabin Assembly | Cabin Body, Mounting, Lock System |
| Electrical System | Headlamp, Tail Lamp, Wiring Harness |
| Interior | Dashboard, Switch Panel, Instrument Cluster |
| Exterior | Bumper, Grille, Fender, Step |
