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350mm Heavy Duty Flywheel for ISUZU FRR 4HK1 - Nodular Cast Iron & Dynamically Balanced

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350mm Heavy Duty Flywheel for ISUZU FRR 4HK1 - Nodular Cast Iron & Dynamically Balanced

MOQ:	5 pcs
Price:	Negotiable
Standard Packaging:	Neutral Package or as customers’ request
Delivery Period:	5-8 Work Days
Payment Method:	T/T,Western Union
Supply Capacity:	10000 pcs/month

Detail Information

Product Description

Detail Information

Place of Origin

China

Brand Name

Certification

ISO/TS16949

Model Number

ISUZU FRR 4HK1

Outer Diameter:

350 Mm

Clutch Disc Diameter:

325 Mm

Ring Gear Teeth:

Ring Gear OD:

≈ 375 Mm

Material:

Nodular Cast Iron (GGG60 / EN-GJS-400-15)

Friction Face Hardness:

180‑240 HB

Max Permissible Runout:

≤0.10 Mm (face) / ≤0.05 Mm (radial)

Weight:

20 Kg (44 Lbs)

Highlight:

350mm ISUZU FRR 4HK1 flywheel

nodular cast iron flywheel

dynamically balanced heavy duty flywheel

Product Description

Flywheel 8-98056352-0 For ISUZU FRR 4HK1 — 350mm Heavy Duty Truck — 8980563520

The Flywheel with OEM number 8-98056352-0 (also listed as 8980563520) is a verified direct-fit replacement for ISUZU FRR series medium-duty trucks (FRR500, FRR600, FRR800) equipped with the 4HK1 5.2L turbo-diesel engine (common rail, EGR, DPF versions) and manual transmission.

The flywheel is a critical drivetrain component. Bolted directly to the engine's crankshaft flange, it performs three vital functions:

Torque smoothing - Its mass provides rotational inertia to reduce engine pulsation
Clutch mounting surface - The friction face mates with the clutch disc and pressure plate
Engine starting - The outer ring gear meshes with the starter motor to crank the engine

This solid (single-mass) flywheel is manufactured from high-grade nodular cast iron (GGG60 / ductile iron grade EN-GJS-400-15), precision-machined to OE specifications, and dynamically balanced to ensure vibration-free operation. The ring gear is induction-hardened to withstand repeated starter engagement.

Technical Specifications

Parameter	Specification	Notes
Outer Diameter	350 mm (13.78 inches)	Standard for 4HK1 clutch system in FRR trucks
Friction Face Diameter	325 mm (clutch disc contact area)	Matches OE clutch disc (e.g., 8-98164918-0)
Ring Gear Teeth	142 teeth (or 144T - verify with original)	Induction-hardened for starter durability
Material	Nodular cast iron (GGG60 / EN-GJS-400-15)	High tensile strength, excellent damping
Balancing	Dynamically balanced (residual unbalance ≤ 10 g*cm)	Eliminates engine vibration
Weight	Approx. 18-22 kg (depending on exact casting)	Heavy-duty mass for torque smoothing

Vehicle Compatibility

Component	Details
Engine	ISUZU 4HK1 (5.2L inline-4 turbo diesel) - 4HK1-TC, 4HK1-E, 4HK1-X (various power ratings: 150-210 hp, up to 588 Nm torque)
Transmission	MZZ6U (6-speed manual), MLD-6Q (6-speed), MYY-5S (5-speed) - confirm with your VIN
Vehicle Models	ISUZU FRR500, FRR600, FRR800 (medium-duty trucks, cab-over / tilt cab)
Years	Approx. 2005-2015 (4HK1 production period for FRR)

Features & Benefits

Feature	Benefit
Precision-cast nodular iron (GGG60)	Superior fatigue strength & damping - Absorbs crankshaft torsional vibrations better than standard gray iron
350mm diameter - full friction surface	Maximizes torque transfer - Engineered for 4HK1's 588 Nm output
Induction-hardened ring gear (142T)	Starter engagement reliability - Hardened teeth resist wear and chipping
Dynamically balanced to ISO 1940-1 G6.3	Zero vibration - Eliminates engine imbalance that can damage components
Direct OE replacement fit	No modifications - Bolt pattern and alignment match factory specifications

Quality Control

QC Item	Verification Method
Material composition	Spectrometer analysis per batch
Hardness (friction face)	Brinell hardness tester (target 180-240 HB)
Dimensional accuracy	CMM inspection (±0.05 mm tolerance)
Dynamic balancing	High-speed balancing machine (residual unbalance ≤10 g*cm)
Crack detection	100% visual and magnetic particle inspection

⚠️ IMPORTANT: Flywheel replacement requires transmission removal and precision torque procedures. Professional installation by heavy-duty truck mechanics is essential.

Installation Recommendations

Critical pre-installation checks:

Inspect crankshaft flange - Clean the mating surface; check for damage
Check pilot bearing - Replace if worn
New flywheel bolts - 4HK1 flywheel bolts are torque-to-yield (TTY)
Clean the new flywheel - Remove anti-rust coating with brake cleaner

Packaging & Supply

Individually packed in heavy-duty cardboard box with foam protection
Anti-rust oil coating applied, wrapped in VCI plastic
Bolts are not included - must be purchased separately
Shipping dimensions: Approx. 38 cm diameter × 8 cm height, weight approx. 20 kg (44 lbs)

Inquiry & Ordering

For Flywheel 8-98056352-0 - 350mm Heavy Duty Replacement for ISUZU FRR 4HK1:

Wholesale prices for fleets, repair shops, distributors
Single unit sample (verify fitment before bulk order)
Bulk order discounts & custom export packaging
Dynamic balancing certificate & QC report on request

Please provide your quantity, destination port, and vehicle details. We strongly recommend ordering new flywheel bolts (TTY type) together with the flywheel for a safe installation.

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350mm Heavy Duty Flywheel for ISUZU FRR 4HK1 - Nodular Cast Iron & Dynamically Balanced

MOQ:	5 pcs
Price:	Negotiable
Standard Packaging:	Neutral Package or as customers’ request
Delivery Period:	5-8 Work Days
Payment Method:	T/T,Western Union
Supply Capacity:	10000 pcs/month

Detail Information

Product Description

Detail Information

Place of Origin

China

Brand Name

YIMI

Certification

ISO/TS16949

Model Number

ISUZU FRR 4HK1

Outer Diameter:

350 Mm

Clutch Disc Diameter:

325 Mm

Ring Gear Teeth:

142T

Ring Gear OD:

≈ 375 Mm

Material:

Nodular Cast Iron (GGG60 / EN-GJS-400-15)

Friction Face Hardness:

180‑240 HB

Max Permissible Runout:

≤0.10 Mm (face) / ≤0.05 Mm (radial)

Weight:

20 Kg (44 Lbs)

Minimum Order Quantity:

5 pcs

Price:

Negotiable

Packaging Details:

Neutral Package or as customers’ request

Delivery Time:

5-8 Work Days

Payment Terms:

T/T,Western Union

Supply Ability:

10000 pcs/month

Highlight

350mm ISUZU FRR 4HK1 flywheel

nodular cast iron flywheel

dynamically balanced heavy duty flywheel

Product Description

Flywheel 8-98056352-0 For ISUZU FRR 4HK1 — 350mm Heavy Duty Truck — 8980563520

The flywheel is a critical drivetrain component. Bolted directly to the engine's crankshaft flange, it performs three vital functions:

Torque smoothing - Its mass provides rotational inertia to reduce engine pulsation
Clutch mounting surface - The friction face mates with the clutch disc and pressure plate
Engine starting - The outer ring gear meshes with the starter motor to crank the engine

Technical Specifications

Parameter	Specification	Notes
Outer Diameter	350 mm (13.78 inches)	Standard for 4HK1 clutch system in FRR trucks
Friction Face Diameter	325 mm (clutch disc contact area)	Matches OE clutch disc (e.g., 8-98164918-0)
Ring Gear Teeth	142 teeth (or 144T - verify with original)	Induction-hardened for starter durability
Material	Nodular cast iron (GGG60 / EN-GJS-400-15)	High tensile strength, excellent damping
Balancing	Dynamically balanced (residual unbalance ≤ 10 g*cm)	Eliminates engine vibration
Weight	Approx. 18-22 kg (depending on exact casting)	Heavy-duty mass for torque smoothing

Vehicle Compatibility

Component	Details
Engine	ISUZU 4HK1 (5.2L inline-4 turbo diesel) - 4HK1-TC, 4HK1-E, 4HK1-X (various power ratings: 150-210 hp, up to 588 Nm torque)
Transmission	MZZ6U (6-speed manual), MLD-6Q (6-speed), MYY-5S (5-speed) - confirm with your VIN
Vehicle Models	ISUZU FRR500, FRR600, FRR800 (medium-duty trucks, cab-over / tilt cab)
Years	Approx. 2005-2015 (4HK1 production period for FRR)

Features & Benefits

Feature	Benefit
Precision-cast nodular iron (GGG60)	Superior fatigue strength & damping - Absorbs crankshaft torsional vibrations better than standard gray iron
350mm diameter - full friction surface	Maximizes torque transfer - Engineered for 4HK1's 588 Nm output
Induction-hardened ring gear (142T)	Starter engagement reliability - Hardened teeth resist wear and chipping
Dynamically balanced to ISO 1940-1 G6.3	Zero vibration - Eliminates engine imbalance that can damage components
Direct OE replacement fit	No modifications - Bolt pattern and alignment match factory specifications

Quality Control

QC Item	Verification Method
Material composition	Spectrometer analysis per batch
Hardness (friction face)	Brinell hardness tester (target 180-240 HB)
Dimensional accuracy	CMM inspection (±0.05 mm tolerance)
Dynamic balancing	High-speed balancing machine (residual unbalance ≤10 g*cm)
Crack detection	100% visual and magnetic particle inspection

⚠️ IMPORTANT: Flywheel replacement requires transmission removal and precision torque procedures. Professional installation by heavy-duty truck mechanics is essential.

Installation Recommendations

Critical pre-installation checks:

Inspect crankshaft flange - Clean the mating surface; check for damage
Check pilot bearing - Replace if worn
New flywheel bolts - 4HK1 flywheel bolts are torque-to-yield (TTY)
Clean the new flywheel - Remove anti-rust coating with brake cleaner

Packaging & Supply

Individually packed in heavy-duty cardboard box with foam protection
Anti-rust oil coating applied, wrapped in VCI plastic
Bolts are not included - must be purchased separately
Shipping dimensions: Approx. 38 cm diameter × 8 cm height, weight approx. 20 kg (44 lbs)

Inquiry & Ordering

For Flywheel 8-98056352-0 - 350mm Heavy Duty Replacement for ISUZU FRR 4HK1:

Wholesale prices for fleets, repair shops, distributors
Single unit sample (verify fitment before bulk order)
Bulk order discounts & custom export packaging
Dynamic balancing certificate & QC report on request

Please provide your quantity, destination port, and vehicle details. We strongly recommend ordering new flywheel bolts (TTY type) together with the flywheel for a safe installation.

Tags: