Mitsubishi Fuso King Pin Kit KP-533 Φ50×243mm ASTM 1045 Steel ISO/TS16949 Certified Steering Knuckle Repair Kit
Basic Properties
Place of Origin:
CHINA
Brand Name:
YIMI
Certification:
ISO/TS16949
Model Number:
FU FV315
Trading Properties
Minimum Order Quantity:
20 PCS
Price:
Negotiable
Payment Terms:
T/T
Supply Ability:
10000 pcs/month
Specifications
| Material: | ASTM 1045 Steel (45#) / ASTM 5140 Steel (40CR) | King Pin Dimensions: | Φ50 × 243 Mm |
| Hardness: | HRC56-60 | Engine Compatibility: | 8DC8 / 8DC9 / 8DC9-1A (16.0L V8 Diesel) |
| Surface Treatment: | Original Steel Color + Anti-rust Oil / Optional Phosphated Finish | Installation Position: | Front Axle Steering Knuckle (LH / RH, Full Kit Services Both Sides) |
| High Light: | Φ50×243mm King Pin Kit,ASTM 1045 Steel King Pin Kit,ISO/TS16949 Certified Steering Knuckle Repair Kit |
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Product Description
Mitsubishi Fuso King Pin Kit KP-533 MC999193 MC999975
Verified OEM Steering Repair Kit — Φ50×243mm for FU FV315 Truck
Product Overview
The Mitsubishi Fuso King Pin Kit with OEM numbers MC999193 / MC999975 (industry part number KP-533, cross-reference MM60 / MM76 / MR533 / GN-507-9193) is a verified direct-fit steering repair kit for Mitsubishi Fuso FU, FV315, FV415, and FV358 heavy trucks. This king pin kit is a critical component of the steering knuckle assembly, connecting the steering knuckle to the front axle beam, bearing vertical loads while allowing the knuckle to pivot for vehicle steering.
Working Principle
The king pin is vertically installed at the end of the front axle beam. The steering knuckle rotates around the king pin via bushings and a thrust bearing. A layer of grease between the king pin and bushings reduces friction, enabling smooth steering operation. The thrust bearing carries the vehicle's vertical load, ensuring the knuckle can rotate freely under load. Proper lubrication is the key to extending king pin and bushing life — when grease intervals are missed or incorrect grease is used, the protective layer breaks down and bushing corrosion begins, leading to steering problems.
Quality Verification
- Field-Verified Fitment: Compatible with Mitsubishi Fuso FU / FV315 / FV415 / FV358 chassis, engine codes 8DC8 / 8DC9 / 8DC9-1A series (16.0L V8 diesel)
- Dimensional Verification: King pin size Φ50×243 mm — conforms to OEM specification for corresponding wheel hub and steering knuckle dimensions
- Hardness Verified: HRC56-60 (high-frequency hardening + tempering treatment), conforms to ASTM 1045 / 5140 material standard
- System Certification: ISO/TS16949 quality management system certified
- Installation Success Rate: [TBD] % direct bolt-on fitment — confirmed across [TBD] repair orders
- OEM Cross-Reference Verified: Directly replaces MC999193 / MC999975 / KP-533 / MM-60 / MM-76 / MR533 / GN-507-9193
Failure Symptoms
Replace promptly if observed:
- Steering noise — Worn king pin bushings create excessive clearance, causing metallic knocking or clunking sounds during steering
- Heavy or binding steering — Insufficient lubrication or seized king pin significantly increases steering effort
- Abnormal front tire wear — King pin clearance alters front wheel alignment, causing irregular or feathered tire wear
- Brake pull — Loose king pin causes steering knuckle misalignment, pulling the vehicle to one side during braking
- Excessive steering play — With the front axle raised, noticeable axial or radial play is felt when rocking the tire
| Part Number: | MC999193 MC999975 | Product Name: | King Pin Kit KP-533 |
|---|---|---|---|
| Car Model: | FUSO | Engine Model: | Φ50×243mm for FU FV315 |
| Condition: | 100% Brand New | Size: | Standard |
| Material: | High-strength aluminum alloy & precision bearings | Cooling Type: | Engine coolant circulation |
| Installation: | Direct OEM replacement | Quality Standard: | OEM equivalent / ISO quality control |
Vehicle & Engine Compatibility
Primary Applications:
| Brand | Model / Series | Chassis | Engine | Years |
|---|---|---|---|---|
| Mitsubishi Fuso | The Great | FU | 8DC8 / 8DC9 | 1983–1995 |
| Mitsubishi Fuso | The Great | FV315 | 8DC9 (16.0L V8) | 1982–1995 |
| Mitsubishi Fuso | The Great | FV415 | 8DC9 / 8DC9-1A | 1982–1995 |
| Mitsubishi Fuso | The Great | FV358 | 8DC9 | 1982–1986 |
| Mitsubishi Fuso | The Great | FU54 / FU41 / FU419N | 8DC8 / 8DC9 | 1983–1995 |
Important:
- This kit is designed for Mitsubishi Fuso The Great series heavy trucks (manufactured 1983–2001)
- King pin dimensions are Φ50×243 mm. Verify original dimensions before selection
- Some FV315 configurations may require different king pin specifications. Provide VIN or chassis number for precise fitment confirmation before ordering
- This kit is a front axle dual-side service type, covering both LH and RH steering knuckles
Features & Benefits
| Feature | Benefit + Verification Signal |
|---|---|
| Forged ASTM 1045 / 5140 Alloy Steel | Withstands high-load conditions with superior shear strength — material standard conforms to ASTM 1045 and 5140 specifications |
| High-Frequency Hardening | Surface hardness HRC56-60 for superior wear resistance — confirmed by hardness tester batch inspection |
| Precision Bushing Fit | Ensures smooth knuckle rotation with reduced steering effort — 100% dimensional inspection at factory against OEM tolerance |
| Complete Kit Configuration | Includes king pin, bushings, thrust bearing, oil seals, and lock pin — full kit services both sides, reducing separate procurement time |
| Multi-Generation Cross Compatibility | Fits FU / FV315 / FV415 / FV358 series chassis — verified through cross-reference part numbers |
| ISO/TS16949 Certified | Production conforms to international automotive quality management standard |
| 12-Month / 20,000 km Warranty | Reduces after-sales risk and supports procurement confidence |
Quality Control & Verification
| QC Item | Verification Method |
|---|---|
| King pin dimensional accuracy | CMM (Coordinate Measuring Machine) / micrometer inspection |
| King pin hardness | Rockwell hardness tester (HRC56-60) |
| Bushing inner diameter | Inside micrometer inspection against OEM tolerance |
| Thrust bearing rotation | Manual rotation check for free movement without binding |
| Surface treatment | Visual inspection + coating thickness gauge (hardening depth) |
| Pre-shipment inspection | 100% visual and dimensional check |
| System certification | ISO/TS16949 |
Installation & Maintenance Recommendations
IMPORTANT: Steering system repair must be performed by qualified professional technicians. Always secure the front axle with jack stands before installation.
Installation Guidelines (Reference Mitsubishi Fuso workshop manual):
- Remove the king pin lock pin lock nut, extract the king pin lock pin, and remove the king pin
- Clean the axle beam king pin bore and steering knuckle, removing rust and old grease
- Install new bushings into the steering knuckle, using a bushing press tool if necessary
- Install the thrust bearing and adjustment shims, then insert the king pin
- Tighten lock pin nut to specified torque — reference value: 4.8±1.3 N·m (steering knuckle starting torque standard)
- Tighten steering knuckle connections — reference torque: 93.2±24.5 N·m (tie rod arm and knuckle arm mounting bolt); 162±15 N·m (king pin lower mounting bolt)
- Confirm smooth king pin operation without binding or excessive clearance
- Apply grease to all lubrication points (NLGI No.2 lithium soap grease recommended)
Maintenance Schedule:
- Inspect king pin bushing clearance and lubrication every 40,000 km or 90 days, whichever comes first
- Perform detailed king pin bushing inspection every 100,000 km or 1 year
- When the truck is on a lift, use a dial indicator to check end play and keep a log of findings — this will indicate when part replacement becomes necessary and help prevent premature tire wear
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