Yimi (Guangzhou) Automotive Parts Co, Ltd
| Payment Terms | T/T, |
| Master Cylinder Type | Tandem (two independent pistons) |
| Brake Type | Drum front and rear, hydraulic, dual circuit |
| OEM Part Number | 8-97224374-0, 8-97315164-0 |
| Supply Ability | 10000 pcs/month |
| Housing Material | Aluminum alloy (die‑cast, corrosion‑resistant) |
| Certifiion | ISO/TS16949 |
| Delivery Time | 5-8 Work Days |
| Reservoir Capacity | 0.3 – 0.4 liters |
| Piston Diameter | 23.81 mm (15/16 inch) |
| Packaging Details | Neutral Package or as customers’ request |
| Engine Compatibility | ISUZU 4JB1 / 4JB1‑T (2.8L, 2,771cc diesel) |
| Chassis Fitment | ISUZU NKR55 (NKR55, NKR55E, NKR55G) |
| Place of Origin | China |
| Model Number | ISUZU NKR55 4JB1 |
| Brand Name | YIMI |
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Product Specification
| Payment Terms | T/T, | Master Cylinder Type | Tandem (two independent pistons) |
| Brake Type | Drum front and rear, hydraulic, dual circuit | OEM Part Number | 8-97224374-0, 8-97315164-0 |
| Supply Ability | 10000 pcs/month | Housing Material | Aluminum alloy (die‑cast, corrosion‑resistant) |
| Certifiion | ISO/TS16949 | Delivery Time | 5-8 Work Days |
| Reservoir Capacity | 0.3 – 0.4 liters | Piston Diameter | 23.81 mm (15/16 inch) |
| Packaging Details | Neutral Package or as customers’ request | Engine Compatibility | ISUZU 4JB1 / 4JB1‑T (2.8L, 2,771cc diesel) |
| Chassis Fitment | ISUZU NKR55 (NKR55, NKR55E, NKR55G) | Place of Origin | China |
| Model Number | ISUZU NKR55 4JB1 | Brand Name | YIMI |
| High Light | ISUZU NKR55 brake master cylinder ，dual-circuit brake master cylinder aluminum alloy ，ISUZU 4JB1 diesel truck brake assembly | ||
The brake master cylinder assembly carrying OEM numbers 8-97224374-0 and 8-97315164-0 (also 8972243740, 8973151640) converts mechanical brake pedal force into hydraulic pressure for the braking system on ISUZU NKR55 series light‑duty trucks powered by the 4JB1 2.8L diesel engine. These interchangeable part numbers refer to the same tandem master cylinder design used across NKR55 chassis from the late 1980s through the mid‑1990s.
| Part Number: | 8-97224374-0 8-97315164-0 | Product Name: | Brake Master Cylinder Assembly |
| Car Model: | ISUZU NKR55 | Engine Model: | ISUZU 4JB1 |
| Condition: | 100% Brand New | Size: | Standard |
| Weight: | Standard | Origin: | China Mainland |
| Main Market: | Middle East, Asia, Africa, South America, North America & Europe | ||
| Package: | Neutral Packing Or Make It As Requested | ||
| Material: | High-strength aluminum alloy & precision bearings | ||
| Installation: | Direct OEM replacement | Quality Standard: | OEM equivalent / ISO quality control |
This ISUZU NKR55 brake master cylinder assembly directly replaces the factory unit in the following configurations:
| Chassis | Engine | Years | Notes |
|---|---|---|---|
| ISUZU NKR55 | 4JB1 (naturally aspirated) | 1988-1994 | Light cab‑over, standard GVWR |
| ISUZU NKR55E | 4JB1‑T (turbo) | 1990-1998 | Turbocharged variant |
| ISUZU NKR55G | 4JB1 | 1992-1998 | Updated chassis |
| ISUZU NKR57 | 4JB1 | 1988-1994 | Slightly longer wheelbase - same master cylinder |
| ISUZU NPR (early) | 4JB1 | 1988-1994 | Some NPR trucks share this cylinder |
| ISUZU KB / Rodeo | 4JB1‑T | 1990-1998 | Pickup trucks with 2.8L diesel |
Contains two independent pistons in series. If one circuit fails due to leakage, the other circuit retains hydraulic pressure for reduced but functional braking.
Die‑cast aluminum body prevents rust and extends service life in coastal or winter‑salt regions. Bore is anodized or hard‑coated for wear resistance.
Formulated EPDM rubber seals resist swelling and hardening caused by moisture absorption - the primary cause of seal failure in older master cylinders.
Includes provision for brake fluid level sensor with translucent reservoir for visual fluid level checking. Capacity: approx. 0.3-0.4 liters.
Four‑stud mounting flange matches NKR55 firewall exactly. Installation typically takes under one hour with no adapter plates or line bending required.
Each unit undergoes hydraulic pressure testing at 1,200 psi (83 bar) for 60 seconds while submerged. Certifie of conformance available for wholesale orders.
| QC Item | Verifiion Method |
|---|---|
| Bore diameter and finish | Air gauge and profilometer - 23.81 mm ±0.02 mm, Ra ≤ 0.4 µm |
| Piston seal integrity | Low‑pressure test: 2 bar applied to outlet; measure pressure decay over 10 seconds |
| High‑pressure external leakage | 1,200 psi for 60 seconds, submerged in test fluid - zero bubbles |
| Reservoir attachment seal | Vacuum test on reservoir chamber - no air ingestion |
| Port thread accuracy | Go/No‑go gauges for M10 × 1.0 threads |
| Pushrod bore alignment | Fixture check - clevis/fork interface square to mounting flange |
| Return spring force | Spring dynamometer - force measured at 50% compression |
| Material certifiion | Spectrography on housing batch - aluminum alloy grade |
Manufacturing facility holds ISO 9001:2015 certifiion with 12‑month warranty against manufacturing defects. Certifie of analysis with batch traceability available for wholesale orders.
The ISUZU NKR55 4JB1 brake master cylinder assembly 8-97224374-0 / 8-97315164-0 is a new, OEM‑specifiion tandem master cylinder. Its aluminum housing resists corrosion, EPDM seals handle glycol brake fluid, and the 23.81 mm bore matches the original hydraulic circuit. One assembly covers NKR55, NKR55E, NKR55G, and NKR57 chassis. ISO 9001 certified with 12‑month warranty and batch traceability.
Order a sample unit today to verify fitment on your NKR55 - the same assembly fits all 4JB1‑powered trucks regardless of export market.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter,Trading Company,Seller
Year Established:
2005
Total Annual:
8000000-10000000
Employee Number:
100~150
Ecer Certification：
Verified Supplier
Yimi (Guangzhou) Automotive Parts Co., Ltd. Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ... Yimi (Guangzhou) Automotive Parts Co., Ltd. Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ...
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