142-5868 Rear Crankshaft Oil Seal For CAT C15 Diesel Engine

• OEM Part Number: 142-5868 / 1425868
• Alias Mark: 3408 (model code marked on picture)
• Fit Engine: CAT C15 diesel engine
• Product Name: Rear Crankshaft Main Oil Seal / Crankshaft Rear Oil Seal
• Structure: Outer metal casing + nitrile rubber sealing lip, single lip rotary shaft oil seal
• Critical Installation Markings:
  • INSTALL DRY: Seal outer diameter must be pressed into housing dry (no grease/oil on OD)
  • SHAFT ROTATION + arrow: Indicates crankshaft rotating direction for lip orientation
• Application: CAT C15 heavy-duty truck engine, industrial stationary power unit, generator set
• Material: High temperature resistant NBR rubber + carbon steel outer shell, anti-leakage, anti-high temperature, anti-engine oil corrosion

1. Original OEM dimensional standard, perfect press fit for C15 engine rear crankshaft bore, no loose fit or oversize issue.
2. Special directional lip design matches crankshaft rotation, stable oil scraping performance under high speed operation, effectively prevents engine oil leakage at rear crankshaft flange.
3. Metal outer frame enhances rigidity during pressing installation, avoids seal deformation or tilting, long service life under heavy load continuous working condition.
4. Strict dry installation requirement for outer circle eliminates outer diameter creeping and housing bore damage caused by lubricant sliding.

142-5868 is CAT C15 engine rear crankshaft main oil seal, installed between engine block and flywheel housing, used to seal the crankshaft rear rotating shaft end and prevent crankcase engine oil leaking to flywheel cavity.

Key installation rule per printed text: The outer cylindrical surface of the seal shall be installed dry without any lubricant; only a tiny amount of clean engine oil can be applied on the inner sealing lip contacting the crankshaft journal. Align the rotation arrow with actual crankshaft running direction to guarantee sealing efficiency.

We supply parts for Kubota, Cum mins, CAT, Perkins, Yanmar, Isuzu, Komatsu, Mitsubishi, Hino, Nissan, Vo lvo, Deutz, Doosan, Daewoo, John Deer e, Scania, Hyundai, JCB etc.

A: It means the outer metal surface of the oil seal must be pressed into the engine housing completely dry, do not add oil, grease or sealant on OD, only lubricate the inner sealing lip lightly.

A: Exclusively for CAT C15 diesel engine rear crankshaft.

A: Outer diameter lubrication will cause seal spin inside the bore, leading to rapid failure and severe oil leak; wrong rotation direction will reduce lip oil scraping ability and cause slow oil seepage.

A: Use professional seal pressing tool to press the seal evenly flush with housing end face, avoid uneven hammer knocking to prevent seal distortion.