Track Link Pin Seal for Cat D3B, D4H, D5M, D6K, D6K2, 517 Skidder & More – 8G3732

Fits Models At A Glance:

• Caterpillar Dozers: D3B (2PC), D3C (7JF), D4 (AX9, EJK, FRP, H3C, JPH, K3G, KWM, MTT, RKR, RLT, S4A, STT), D4H (2AC, 3AC, 4NK, 8PB, 8PJ, 9DB), D4H III (9GJ), D5M (3CR, 3DR, 4BR, 4JS, 5ES, 5FS, 6AS, 6GN), D5N (AGG, AKD, CFH, CKT), D6K (6S6, DHA, FBH, HMG, MP7, NCF, ZLJ), D6K2 (7PS, DFR, EL7, JTR, MGM, MXK, RPR, RST, WMR)
• Caterpillar Track Skidders: 517 (5WW, 6PW), D4HTSK II (8ZF), D4HTSK III (7PK)

Key Notes:

• Part Number: 8G3732
• Weight: 0.20 lbs (0.09 kg)
• Outer Diameter: 3-7/8 in (98 mm)
• Inner Diameter: 1-15/16 in (49 mm)
• Width: 7/16 in (10 mm)
• Material: Rubber and steel
• Type: Lip-type pin seal — seals the end of the track link master pin on sealed and lubricated track (SALT) undercarriage systems
• Application: Retains grease inside the track link pin bore and excludes mud, water, and abrasive debris from the pin-bushing interface; a critical wear item on SALT undercarriage systems that directly impacts track chain and undercarriage service life

Common Use Case or Symptoms:
Use when track pins show rapid wear, grease purges from link joints during operation, or contamination is causing stiff or uneven track movement — failed pin seals allow lubricant loss and dirt ingress that accelerates pin, bushing, and bore wear across the entire track chain.

Why Choose Broken Tractor:
✅ Broader Serial Coverage Across Three Dozer Generations — fits D3 through D6K2 production runs and D4H-based skidder variants in a single seal design
✅ Fast Shipping from a U.S.-Based Team — in-stock and ready to ship from our U.S. warehouses