350mm Heavy Duty Flywheel for ISUZU FRR 4HK1 - Nodular Cast Iron & Dynamically Balanced
Price:
Negotiable
MOQ:
5 pcs
Delivery Time:
5-8 Work Days
Brand:
YIMI
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
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Yimi (Guangzhou) Automotive Parts Co, Ltd
Location
4F, 7th, No. 2, South Jinguu Road, Huadong Town, Huadu District, Guangzhou City
Contact Person
James