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1684106 CRANKSHAFT SEAL REAR XF105 – Critical Engine Sealing for DAF XF105 and CF85 Series
The DAF 1684106 CRANKSHAFT SEAL REAR XF105 is an essential component designed to maintain oil integrity at the rear end of the crankshaft in DAF XF105 and CF85 trucks. Installed at the junction where the crankshaft exits the engine block and interfaces with the transmission, this seal prevents engine oil from leaking out—a crucial task in maintaining lubrication, preventing contamination, and protecting the longevity of high-performance engines such as the Paccar MX series.
What Is a Rear Crankshaft Seal?
The rear crankshaft seal, also known as the rear main seal, ensures that engine oil does not escape from the rear of the engine. This area is particularly vulnerable due to the rotating motion of the crankshaft and its proximity to the clutch housing or flywheel. A leak in this seal can lead to loss of oil pressure, clutch contamination, and eventual engine failure.
The 1684106 seal is built to resist high rotational speeds, thermal stress, and the chemical breakdown of engine oil. Made with durable elastomers and engineered for tight tolerances, it provides long-lasting, leak-proof performance.
Technical Specifications
• Part Number: 1684106
• Alternate Numbers: 1876190, 19037227B
• Inner Diameter: 166 mm
• Outer Diameter: 191 mm
• Width: 16 mm
• Material: PTFE (Polytetrafluoroethylene) with ACM (Acrylic Rubber)
• Design Type: ASW (axial shaft seal with dust lip)
• Swirl Type: Left-hand twist
• Dust Cover: Integrated
• Mounting: Dry installation only (no oil or grease)
Compatible Vehicles
The DAF 1684106 crankshaft seal is compatible with:
• DAF XF105 (Euro 4/5/6)
• DAF CF85
• Paccar Engines: MX-13 265/300/340/375 kW
• Also found in buses such as:
• Bova Magiq, Synergy
• Irizar i3, i4, i6, i8, PB
• Van Hool T/EX Series
• VDL Futura, Jonckheere
• Temsa Safari, Safir
Always verify compatibility by using the vehicle’s VIN or checking manufacturer technical data.
Key Benefits
1. Leak Prevention
The 1684106 seal ensures that engine oil stays inside the crankcase. A good seal helps maintain oil pressure and reduces the risk of engine damage due to lubrication failure.
2. Protection Against Contamination
The integrated dust lip prevents external debris from entering the crankshaft housing, helping preserve the engine’s internal components.
3. Reduced Maintenance Costs
Preventing oil leaks helps protect nearby components such as the clutch, flywheel, and starter motor—reducing the need for costly repairs and increasing uptime.
4. Extended Seal Life
Constructed from high-grade PTFE and rubber composites, this seal is resistant to high heat, oil breakdown, and mechanical wear.
Installation Guidelines
Proper installation is essential to the performance of the seal:
1. Prepare the Surface: Clean the crankshaft flange and mounting area thoroughly. Ensure no oil or residue remains.
2. Remove the Old Seal: Use an appropriate extraction tool to remove the existing seal without scratching the housing.
3. Use Proper Tools: Utilize an approved seal driver tool (such as Laser Tools 8536) to press the seal evenly into position.
4. Do Not Lubricate: Install the seal dry—do not use oil or assembly lube, which may cause seal failure.
5. Alignment: Ensure the seal is flush and evenly seated to prevent uneven wear or leaks.
Signs of a Worn or Failing Rear Seal
• Visible oil leak at the transmission bell housing
• Clutch slippage due to oil contamination
• Low oil levels without external leaks
• Unusual engine noises or vibrations
Maintenance Advice
• Inspect during clutch or flywheel service
• Replace during engine rebuilds or transmission overhauls
• Use only OEM-quality seals to ensure long-term performance
1684106 CRANKSHAFT SEAL REAR XF105
The DAF 1684106 CRANKSHAFT SEAL REAR XF105 is a small but critical part of the engine’s sealing system, particularly in high-powered commercial vehicles like the XF105 and CF85. Its role in preventing oil leakage, safeguarding internal components, and supporting engine reliability makes it indispensable in regular maintenance routines.
For fleet operators, workshops, and parts distributors, using genuine or OEM-quality rear crankshaft seals ensures performance, compliance, and peace of mind.
To purchase or inquire about the DAF 1684106 seal, contact [Your Company Name] – your trusted source for DAF truck engine parts and drivetrain sealing solutions.
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