Mitsubishi Fuso Canter King Pin Kit KP550 MC994307 OEM Fit

The King Pin Kit with reference code KP550 and OEM number MC994307 is a verified direct-fit replacement for Mitsubishi Fuso heavy trucks equipped with 6D14 / 6D15 / 6D16 / 6D22 diesel engines. This king pin kit is a critical steering knuckle component that connects the front axle to the steering knuckle, allowing the front wheels to pivot for steering while supporting the vehicle's weight.

The king pin kit serves as the pivot point for the steering knuckle on the front axle. It allows the knuckle to rotate for steering while maintaining precise alignment between the axle beam and the knuckle assembly. The king pin must withstand both vertical loads (vehicle weight) and horizontal loads (steering forces, braking forces, and road impacts). The KP550 kit includes a Φ45*216 mm hardened 40Cr alloy steel king pin, bronze bushings, thrust bearings, shims, seals, and mounting hardware. The rubber O-rings and seals prevent contamination from entering the bushing area, while the thrust bearing supports the vertical load and ensures smooth steering rotation. The 6D14 is a 6.55L inline-six diesel engine, the 6D15 is a 6.9L variant, the 6D16 is a 7.5L engine, and the 6D22 is an 11.1L engine, all widely used in Mitsubishi Fuso heavy trucks from 1976 to 1999.

Replace the king pin kit when any of these symptoms appear:

• Steering wander or excessive steering play — worn king pin bushings allow the knuckle to move, causing the vehicle to wander on straight roads.

• Uneven or accelerated front tire wear — misaligned knuckle geometry from worn king pins causes cupping or scalloped tire wear patterns.

• Front end shimmy or vibration — loose king pins allow the front wheels to oscillate at certain speeds.

• Hard steering or binding — seized or corroded king pins prevent smooth steering operation.

• Clunking or knocking noise from the front axle — excessive clearance between the king pin and bushings causes metal-to-metal contact.

⚠️ Critical Inspection Note: Mitsubishi service manuals require that the king pin be replaced, never reused, when the knuckle is removed. Always replace king pins, bushings, bearings, and seals as a complete kit. Inspect the axle beam king pin bore for wear or elongation — if damaged, the axle beam must be replaced. Always use new king pin bolts and nuts. After installation, a professional wheel alignment must be performed to restore correct steering geometry. Press-fit the kingpin bushing so that the gap between the bushing and knuckle is within 0 to 1 mm (0 to 0.039 in.).

Brand	Model	Chassis	Engine	Years
Mitsubishi	Fuso Fighter	FM215	6D14 / 6D15	1976–1985
Mitsubishi	Fuso Fighter	FM515	6D14 / 6D15	1984–1989
Mitsubishi	Fuso Fighter	FK455	6D14 / 6D15	1986–1991
Mitsubishi	Fuso Fighter	FK457	6D14 / 6D15	1989–1991
Mitsubishi	Fuso Great	FU410NS	6D40	—
Mitsubishi	Fuso Fighter	FM657	6D16	—
Mitsubishi	Fuso Fighter	FS415	6D16	—
Mitsubishi	Fuso	FM104	—	1976–1979

Engine-Specific Applications

Engine Model	Displacement	Common Applications
6D14	6.55L	FM215, FM515, FK455, FK457
6D15	6.9L	FM215, FM515, FK455, FK457
6D16	7.5L	FM657, FS415
6D22	11.1L	FM series heavy trucks
6D40	12.0L	FU410NS

⚠️ Important Fitment Notes:

• This king pin kit is designed for the front axle application. Confirm the king pin diameter (Φ45 mm) and length (216 mm) against your original component before ordering.

• The MC994307 is the primary OEM cross-reference for this kit. The MC811604, MC999970, MC750433, and MC807430 are related OEM numbers for the same application.

• The KP550 kit is compatible with a wide range of Mitsubishi Fuso chassis, including FM215 (1976–1985), FM515 (1984–1989), FK455 (1986–1991), FK457 (1989–1991), FU410NS, FM657, and FS415.

• The KP531 / KP-531, KP521 / KP-521, and KP538 / KP-538 are interchangeable kit references for the same application.

• Always use new king pin bolts and nuts — never reuse old fasteners.

• After installation, a professional wheel alignment must be performed to restore correct steering geometry.

• For right-hand drive (RHD) vehicles, verify clearance and orientation. Refer to the Mitsubishi workshop manual for the correct procedure.

📌 Fitment Verification: To ensure 100% accurate matching, please provide the VIN or chassis number before ordering. We will verify it through the Mitsubishi global EPC system.

✅ Features & Benefits

Feature	Benefit + Verification Signal
40Cr Alloy Steel King Pin (Φ45*216 mm)	High hardness and tensile strength for reliable steering pivot under heavy loads — verified by SR-Machinery specification.
Bronze Bushings	Superior wear resistance and load-bearing capacity compared to standard bushings — verified by product specification.
Thrust Bearing Included	Supports vertical load and ensures smooth steering rotation — verified by product specification.
Complete Kit Coverage	Includes king pin, bushings, thrust bearings, shims, seals, and all mounting hardware for a full replacement — verified by product listing.
Wide Vehicle Compatibility	Covers Mitsubishi Fuso FM215, FM515, FK455, FK457, FU410NS, FM657, and FS415 with 6D14, 6D15, 6D16, 6D22, and 6D40 engines — verified by Brett's Truck Parts application catalog.
ISO/TS 16949 & ISO9001 Certified	Full traceability with material certificates and batch inspection reports — third-party certified.
12-Month / 20,000 km Warranty	Manufacturer-backed quality assurance for fleet operations — verified by Brett's Truck Parts warranty terms.

✅ Quality Control & Verification

QC Item	Verification Method / Standard
King Pin Diameter (Φ45 mm)	CMM, 100% inspection
King Pin Length (216 mm)	CMM, 100% inspection
King Pin Hardness	Rockwell hardness tester, batch sampling
Bushing ID / OD	CMM, 100% inspection
Bushing Press-Fit Gap (0–1 mm)	Feeler gauge, 100% inspection
Thrust Bearing Dimensions	CMM, 100% inspection
Shim Thickness	Micrometer, 100% inspection
Seal Dimensions	CMM, 100% inspection
Surface Finish	Visual inspection — no cracks, no burrs, no contamination
Kit Completeness	100% component count verification
Batch Traceability	Material lot number + production date
Packaging Protection	Anti-rust oil + VCI film + carton

✅ Installation & Maintenance Recommendations

⚠️ IMPORTANT: King pin replacement is a professional-level steering system repair. It must be performed by a qualified technician in a clean workshop. Always replace king pins, bushings, bearings, and seals as a complete kit. Never reuse old king pins or fasteners.

Installation Guidelines — Reference Mitsubishi Fuso Workshop Manual

1. Preparation: Raise the vehicle on a hoist. Remove the front wheels. Support the front axle. Disconnect the steering linkage from the knuckle.

2. Disassembly: Remove the king pin lock pin. Remove the king pin cover plates (top and bottom). Press the old king pin out using a hydraulic press or king pin driver. Remove the old bushings, bearings, and seals.

3. Inspection: Inspect the axle beam king pin bore for wear, elongation, or scoring. Measure the bore diameter. Inspect the steering knuckle bore for wear. If the knuckle bore is worn beyond the oversize kit range, the knuckle must be replaced.

4. Bushing Installation: Press the new bushings into the knuckle. Press-fit the kingpin bushing so that the gap between the bushing and knuckle is within 0 to 1 mm (0 to 0.039 in.) . Do not ream unless specified by the bushing manufacturer. The bushings are pre-sized for the king pin diameter.

5. Grease Fitting Installation: Install the grease fitting into the knuckle.

6. King Pin Installation: Lubricate the king pin and bushings with chassis grease. Insert the shim on the upper side of the thrust bearing and install the king pin. Install the thrust bearing on top of the knuckle.

7. Lock Pin Installation: Align the king pin cut groove and lock bolt hole, tighten the lock bolt, and lock by tightening the lock nut.

8. Cover Plate Installation: Install the king pin cover plates and gaskets. Tighten the bolts to specification.

9. Steering Linkage Reconnection: Reconnect the steering linkage. Tighten the retaining bolts to specification.

10. Greasing and Road Test: Grease the king pins through the fittings. Lower the vehicle and perform a road test to verify steering operation. Perform a professional wheel alignment.

Recommended Torque Values:

Fastener	Torque
King Pin Lock Pin Lock Nut	Per Mitsubishi workshop manual specification
King Pin Cover Plate Bolts	Per Mitsubishi workshop manual specification
Steering Arm Retaining Bolts	Per Mitsubishi workshop manual specification

Maintenance Schedule

• Every 10,000 km: Grease king pins through the grease fittings. Check for steering play.

• Every 40,000–50,000 km: Inspect king pin bushings for wear. Check steering knuckle for excessive play.

• When steering play is detected: Inspect king pins immediately. Replace if wear is beyond specification.

• At any steering system repair: Always replace king pins, bushings, bearings, and seals as a complete kit.

✅ Packaging & Supply

• Standard Packaging: Anti-rust oil + VCI film + neutral carton.

• Custom Packaging: Neutral box, color box, or customer-branded packaging.

• Suitable For: Steering system repair shops, Mitsubishi Fuso parts distributors, fleet maintenance centers.

• Supply Capacity: Stable batch supply with batch-level quality reports available.

• MOQ: Unlimited (better price for more quantity)