KomatsuBrake Parts

4S8724 Disc-Friction — Komatsu 621 621b

OEM-specification Komatsu Disc-Friction. CTP aftermarket replacement. Part number 4S8724. Compatible with 621, 621b, 621E, 621F, 621g, 621H, 621k, 621r, 623, 623b, 623E, 623F, 623g, 623H, 623k, 623k Lrc, 627b, 627E, 627F, 627g, 627H, 627k, 627k Lrc, 631c, 631E, 631g, 633c, 633D, 633E ii, 637D, 637E,

Disc-Friction – Part No 4S8724 – Komatsu Spare Part
Part Specifications
BrandKomatsu
CategoryBrake Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

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Installation & Application Notes

Always replace brakes in axle sets. Bed-in new brake pads with 8–10 moderate stops from 40 km/h. Check disc runout with a dial gauge — maximum 0.1 mm. Inspect caliper slides and pistons when replacing pads.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.