ISUZU NKR77 4JH1 Door Regulator Assembly with Cable-Driven Single-Rail Lifting Mechanism and High-Strength Structural Steel for 20,000+ Cycles
| Material: | High-Strength Structural Steel With Galvanized Plating | Net Weight: | 1.5–1.77 Kg |
| Operation Type: | Power / Electric (24V) | Mechanism Type: | Cable-Driven Single-Rail Lifting Mechanism |
| Endurance Testing: | 20,000+ Cycles | Position: | Front Left-Hand (Driver Side) |
| High Light: | Cable-Driven Single-Rail Lifting Mechanism Door Regulator Assembly,High-Strength Structural Steel Power Window Regulator,20000+ Cycles Endurance Testing Window Regulator |
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Door Regulator Assembly 8978681142 8-97868114-2 for ISUZU NKR77 NPR NQR NPS — Verified OEM Fit Front Left Power Window Regulator (Without Motor), 24V
This window regulator is a critical door system component responsible for raising and lowering the driver-side door window smoothly and reliably under commercial fleet operating conditions.
The power window regulator converts the rotational force of the electric motor into vertical window glass movement. This regulator features a cable-driven single-rail lifting mechanism with a hardened-steel linkage structure and reinforced pivot points. This is a complete regulator assembly without the motor — designed to reuse the original factory motor.
- Window moves slowly or erratically
- Window falls down or will not stay up
- Grinding or scraping noise when operating the window
- Window binds or jams in the track
- Visible cable damage or regulator arm deformation
| Verification Item | Data / Standard |
|---|---|
| Part Number (Short) | 8978681142 |
| Part Number (Long) | 8-97868114-2 |
| Vehicle Models | ISUZU NKR77 / NPR / NQR / NPS / NPR-HD / NRR / ELF |
| Engine Compatibility | 4JH1 / 4JH1-TC / 4HE1 / 4HG1 / 4HK1 |
| Position | Front Left-Hand (Driver Side) |
| Operation Type | Power / Electric (24V) |
| Motor Included | No (Reuse Factory Motor) |
| Mechanism Type | Cable-Driven Single-Rail Lifting Mechanism |
| Material | High-Strength Structural Steel with Galvanized Plating |
| Net Weight | 1.5–1.77 kg |
| Endurance Testing | 20,000+ Cycles |
| Certification | ISO/TS 16949 |
| Part Number: | 8978681142 8-97868114-2 |
| Car Model: | NKR77 |
| Engine Model: | 4JH1 |
| Condition: | 100% Brand New |
| Brand | Model | Chassis | Engine | Years |
|---|---|---|---|---|
| ISUZU | ELF | NKR77 | 4JH1-TC | 2002–2007 |
| ISUZU | ELF | NKR77 | 4JH1 | 2003–2007 |
| ISUZU | NPR | NPR75 | 4HK1-T | 2005–2008 |
| ISUZU | NPR | NPR77 | 4JH1-TC | 2003–2007 |
| ISUZU | NQR | NQR70 | 4HE1T | 1996–2005 |
| ISUZU | NQR | NQR71 | 4HG1 | 1996–2005 |
| ISUZU | NQR | NQR75 | 4HK1-TCS | 2005–2008 |
| ISUZU | NPS | NPS70 | 4HE1T | 2003–2005 |
| ISUZU | NPS | NPS71 | 4HG1 | 1996–2005 |
| ISUZU | NPS | NPS75 | 4HK1T | 2005–2008 |
| ISUZU | NPR-HD | NPR-HD | 4HK1 | 1999–2010 |
| Brand | Model | Application |
|---|---|---|
| Chevrolet | W3500 / W4500 / W5500 Tiltmaster | Light Truck |
| GMC | W3500 / W4500 / W5500 Forward | Light Truck |
| Nissan | Atlas PB-AKR81 | Light Truck |
- This regulator is designed for the front left-hand (driver side) position
- This is a power window regulator without motor — the original factory 24V motor is reused
- Always inspect the window glass channel and guide rails for wear or debris before installation
Provides structural strength and long service life under commercial fleet use
Withstands high humidity and severe coastal road weather
Ensures consistent lift speed and reliable mechanical engagement
Simulates years of heavy-duty truck cabin operations without failure
Precision gear teeth and mounting holes perfectly fit the existing factory 24V motor
Direct replacement without modification
| QC Item | Verification Method / Standard |
|---|---|
| Mounting Bracket Dimensions | CMM, 100% inspection |
| Guide Rail Geometry | CMM, 100% inspection |
| Cable Tension | Tension tester, 100% inspection |
| Motor Gear Engagement | Functional test, 100% inspection |
| Lift Travel Range | Functional test, 100% inspection |
| Surface Finish | Visual + coating thickness inspection |
| Cycle Endurance Test | 20,000+ cycle test, batch sampling |
- Preparation: Lower the window completely. Disconnect the battery negative terminal.
- Removal: Support the window glass. Remove regulator mounting bolts and disconnect motor.
- Inspection: Inspect window glass channel and guide rails for wear or damage.
- Preparation for New Regulator: Verify dimensions and apply silicone grease.
- Installation: Install factory motor onto new regulator and mount in door cavity.
- Window Glass Attachment: Attach window glass to regulator carrier.
- Final Check: Test window operation through full range of motion.
- Road Test: Verify proper operation from driver's seat.
- Standard Packaging: Anti-rust oil + VCI film + neutral carton
- Custom Packaging: Neutral box, color box, or customer-branded packaging
- Suitable For: Body repair shops, ISUZU parts distributors, fleet maintenance centers
- Supply Capacity: Stable batch supply with batch-level quality reports
- Minimum Order Quantity: 5 PCS
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