6204-21-3530 Crankshaft Front Oil Seal For Komatsu 3D84-3 Engine PC30-7 Excavator

• OEM Part Number: 6204-21-3530
• Engine Model: Komatsu 3D84-3
• Product Name: Crankshaft Front Oil Seal / Timing Gear End Oil Seal
• Compatible Equipment: Komatsu PC30-7 Mini Excavator, small loaders & generators with 3D84-3 engine
• Material: Reinforced NBR nitrile rubber with embedded metal skeleton
• Seal Type: Single lip rotary shaft skeleton oil seal
• Warranty: 6 Months
• Core Function: Seals the gap between crankshaft front journal and timing gear housing, prevents engine oil leaking from the front end of crankshaft, protects timing chain/gear assembly from oil loss and dust contamination

1. Exact OEM dimension 6204-21-3530, direct press-in fit for 3D84-3 engine, no machining or modification required.
2. Built-in metal rigid frame resists deformation under high engine temperature and continuous vibration.
3. Inner spiral anti-leak thread creates oil return pumping effect during crankshaft rotation for reliable long-term sealing.
4. Superior resistance to motor oil corrosion, heat aging and shaft friction wear, extends service life.

This front crankshaft oil seal with OEM number 6204-21-3530 is a dedicated sealing component for Komatsu 3D84-3 three-cylinder diesel engine, installed at the timing gear cover side of the crankshaft. A worn, cracked or hardened front oil seal will cause continuous oil seepage onto timing components, leading to timing gear lubrication failure and premature engine damage. It is a standard replacement part during engine overhaul, timing cover disassembly and front crankshaft maintenance. Every unit undergoes dimensional tolerance, rubber hardness and sealing performance testing before shipment.

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