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350mm Heavy Duty Flywheel for ISUZU FRR 4HK1 - Nodular Cast Iron & Dynamically Balanced
350mm Heavy Duty Flywheel for ISUZU FRR 4HK1 - Nodular Cast Iron & Dynamically Balanced
350mm Heavy Duty Flywheel for ISUZU FRR 4HK1 - Nodular Cast Iron & Dynamically Balanced
350mm Heavy Duty Flywheel for ISUZU FRR 4HK1 - Nodular Cast Iron & Dynamically Balanced
Specifications
Max Permissible Runout :
≤0.10 mm (face) / ≤0.05 mm (radial)
MOQ :
5 pcs
Payment Terms :
T/T,
Brand Name :
YIMI
Certifiion :
ISO/TS16949
Supply Ability :
10000 pcs/month
Delivery Time :
5-8 Work Days
Price :
Negotiable
Ring Gear OD :
≈ 375 mm
Material :
Nodular cast iron (GGG60 / EN-GJS-400-15)
Place of Origin :
China
Outer Diameter :
350 mm
Weight :
20 kg (44 lbs)
Packaging Details :
Neutral Package or as customers’ request
Ring Gear Teeth :
142T
Clutch Disc Diameter :
325 mm
Friction Face Hardness :
180‑240 HB
Model Number :
ISUZU FRR 4HK1
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 specifiions, and dynamically balanced to ensure vibration-free operation. The ring gear is induction-hardened to withstand repeated starter engagement.
Technical Specifiions
Parameter Specifiion 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 modifiions - Bolt pattern and alignment match factory specifiions
Quality Control
QC Item Verifiion 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)
350mm Heavy Duty Flywheel for ISUZU FRR 4HK1 - Nodular Cast Iron & Dynamically Balanced
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 certifie & 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

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Product Detail
Max Permissible Runout :
≤0.10 mm (face) / ≤0.05 mm (radial)
MOQ :
5 pcs
Payment Terms :
T/T,
Brand Name :
YIMI
Certifiion :
ISO/TS16949
Supply Ability :
10000 pcs/month
Contact Supplier
350mm Heavy Duty Flywheel for ISUZU FRR 4HK1 - Nodular Cast Iron & Dynamically Balanced
350mm Heavy Duty Flywheel for ISUZU FRR 4HK1 - Nodular Cast Iron & Dynamically Balanced

Yimi (Guangzhou) Automotive Parts Co, Ltd

Verified Supplier
3 Years
guangzhou
Since 2005
Business Type :
Manufacturer, Distributor/Wholesaler, Exporter, Trading Company, Seller
Main Products :
Isuzu Cars Parts, Isuzu Engine Parts, Isuzu Chassis Parts
Total Annual :
8000000-10000000
Employee Number :
100~150
Certification Level :
Verified Supplier
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