Komatsu 4D95 S4D95 Forged Steel Engine Crankshaft for PC60 PC75 PC100 Excavator

1. Product Overview & Wholesale Price Range

The Komatsu 4D95 S4D95 Forged Steel Crankshaft is the backbone of your engine's power stroke. Unlike common cast iron replacements, our forged steel version offers superior tensile strength and resistance to harmonic vibrations, significantly extending the engine's service life.

• Factory Wholesale Price: $220 – $480 USD (Save up to 40% vs regional distributors)
• Manufacturing Process: 100% Forged Steel with Induction Hardened Journals
• Surface Treatment: Nitrided / Polished for reduced friction and heat
• Dynamic Balance: Precision balanced to prevent engine vibration
• Warranty: 12 Months full replacement warranty

2. Application & Compatibility Checklist

This crankshaft is precision-matched for the following Komatsu equipment and engine models:

3. 4D95 Crankshaft Troubleshooting: Signs You Need a Replacement

Recognizing crankshaft wear early can prevent catastrophic engine failure. Consult our guide below:

• Fault 1: Low Oil Pressure at Idle
  Cause: Worn main journals create excessive clearance, bleeding off oil pressure. Replacement is advised if journals are ground beyond standard undersize limits.
• Fault 2: Deep Metallic Knocking Sound
  Cause: Worn connecting rod journals (big end) hitting the bearings. Our forged 4D95 crankshaft restores the precise stroke.
• Fault 3: Excessive Engine Vibration
  Cause: Bent crankshaft due to previous engine seizure or overheating. A forged steel replacement provides better rigidity.

4. Frequently Asked Questions (FAQ)

Q: Why choose Forged Steel over Casting for the 4D95 engine?
A: Forged steel is compressed during manufacturing, eliminating internal air pockets. It can handle the high turbo pressure of the S4D95 engine much better than cast iron.

Q: Do you provide the matching bearing sets?
A: Yes, we offer complete engine kits including Main Bearings, Con-rod Bearings, and Thrust Washers (Standard or Undersize).

Q: Is the 4D95 crankshaft balanced before shipping?
A: Absolutely. Every unit undergoes dynamic balancing on a computerized bench to ensure zero vibration at high RPMs.