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Yimi (Guangzhou) Automotive Parts Co, Ltd

  • China,Guangzhou
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China ISUZU NKR55 4JB1 Clutch Slave Cylinder Repair Kit with 22.22 mm Bore OEM Fit NBR
China ISUZU NKR55 4JB1 Clutch Slave Cylinder Repair Kit with 22.22 mm Bore OEM Fit NBR

  1. China ISUZU NKR55 4JB1 Clutch Slave Cylinder Repair Kit with 22.22 mm Bore OEM Fit NBR

ISUZU NKR55 4JB1 Clutch Slave Cylinder Repair Kit with 22.22 mm Bore OEM Fit NBR

  1. MOQ: 20 PCS
  2. Price: Negotiable
  3. Get Latest Price
Cylinder Bore Size 22.22 mm (7/8 inch)
Delivery Time 5-8 Work Days
Net Weight 0.08 kg
Packaging Details Neutral Package or as customers’ request
Payment Terms T/T
Push Rod Play 2 mm (0.1 in)
Fluid Compatibility DOT 3 / DOT 4 brake fluid
Temperature Range −40°C to +120°C
Bolt Torque 37 N·m (3.8 kgf·m / 27 lb ft)
Supply Ability 10000 pcs/month
Kit Contents Cup seals + dust boots + related seals
Material NBR (Nitrile) / EPDM Rubber
Model Number NKR55 4JB1
Brand Name YIMI
Place of Origin CHINA
Certification ISO/TS16949

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  1. Product Details
  2. Company Details

Product Specification

Cylinder Bore Size 22.22 mm (7/8 inch) Delivery Time 5-8 Work Days
Net Weight 0.08 kg Packaging Details Neutral Package or as customers’ request
Payment Terms T/T Push Rod Play 2 mm (0.1 in)
Fluid Compatibility DOT 3 / DOT 4 brake fluid Temperature Range −40°C to +120°C
Bolt Torque 37 N·m (3.8 kgf·m / 27 lb ft) Supply Ability 10000 pcs/month
Kit Contents Cup seals + dust boots + related seals Material NBR (Nitrile) / EPDM Rubber
Model Number NKR55 4JB1 Brand Name YIMI
Place of Origin CHINA Certification ISO/TS16949
High Light 22.22 mm Bore Clutch Slave Cylinder Repair Kit ,OEM Fit Hydraulic Clutch Sealing Kit ,NBR/EPDM Rubber Clutch Slave Cylinder Seal Kit
ISUZU NKR55 4JB1 Clutch Slave Cylinder Repair Kit 5-87831402-1 5878314021 OEM Fit
Product Overview

Clutch Slave Cylinder Repair Kit 5-87831402-1 5878314021 for ISUZU NKR55 4JB1 — Verified OEM Fit 22.2 mm Bore Hydraulic Clutch Sealing Kit

This repair kit is a verified direct-fit replacement for ISUZU NKR55 light trucks equipped with the 4JB1 diesel engine. This critical hydraulic sealing component restores clutch hydraulic pressure and ensures smooth, reliable clutch disengagement.

Working Principle

The clutch slave cylinder repair kit functions as the primary hydraulic seal within the clutch slave cylinder. It converts hydraulic pressure from the clutch master cylinder into mechanical force that pushes the clutch release fork, disengaging the clutch disc from the flywheel. The cup-shaped seal features a precisely angled sealing lip that expands under hydraulic pressure — the greater the pedal force, the tighter the seal.

Failure Symptoms
  • Clutch fluid seepage past the dust boot — visible fluid traces on the slave cylinder body or bell housing
  • Spongy or sinking clutch pedal — internal fluid bypass caused by worn or hardened cup seals reduces hydraulic pressure
  • Difficulty engaging or disengaging gears — insufficient slave cylinder travel prevents full clutch release
  • Clutch fluid contamination — degraded rubber particles from worn seals contaminate the clutch fluid
Critical Inspection Note: ISUZU service manuals require that when rebuilding a clutch slave cylinder, all seals and dust boots must be replaced as a complete kit. Prior to installation, inspect the cylinder bore for scoring or pitting — if damaged, replace the entire slave cylinder assembly. Always use clean DOT 3 or DOT 4 brake fluid and bleed the system thoroughly after installation.
Technical Specifications
Verification Item Data / Standard Source / Method
Part Number (Short) 5-87831402-1 ISUZU OEM Parts Database
Factory Number 5878314021 ISUZU OEM Parts Database
Engine Compatibility 4JB1 / 4JB1-T (2.8L, 4-cylinder, OHV, DI) ISUZU application catalog
Cylinder Bore Size 22.22 mm (7/8 inch) ISUZU workshop specification
Material NBR (Nitrile) / EPDM Rubber Material certificate
Slave Cylinder Bolt Torque 37 N·m (3.8 kgf·m / 27 lb ft) ISUZU NKR 4J Series Workshop Manual
Net Weight (per kit) 0.08 kg Product specification
Certification ISO/TS 16949 Third-party system audit
ISUZU Clutch Slave Cylinder Repair Kit 5-87831402-1
Product Details

Part Number: 5-87831402-1 5878314021

Product Name: Clutch Slave Cylinder Repair Kit

Car Model: NKR55

Engine Model: 4JB1

Condition: 100% Brand New

Material: High-strength aluminum alloy & precision bearings

Vehicle Compatibility
Brand Model Chassis Engine Years
ISUZU ELF NKR55 4JB1 1986–1993
ISUZU ELF NKR55 4JB1 1996–2007
ISUZU ELF 100 NHR 4JB1 1984–1990
Important Fitment Notes: This repair kit is designed for the 22.22 mm (7/8 inch) clutch slave cylinder bore. Confirm the bore diameter of your slave cylinder before ordering. The 4JB1 clutch slave cylinder uses a different bore size from the US-model 4JB1 engines. For right-hand drive (RHD) vehicles, the slave cylinder orientation may differ.
Fitment Verification: To ensure 100% accurate matching, please provide the VIN or chassis number before ordering. We will verify it through the ISUZU global EPC system.
Features & Benefits
Feature Benefit + Verification Signal
NBR / EPDM Rubber Compound Exceptional resistance to DOT 3 and DOT 4 brake fluid swelling, heat degradation, and compression set
OEM-Exact Lip Geometry (22.22 mm) Cup-shaped sealing lip expands under hydraulic pressure for a tighter seal as clutch pedal force increases
Complete Kit Coverage Includes all seals and dust boots needed for a professional clutch slave cylinder rebuild
ISO/TS 16949 Quality System Full traceability with material certificates and batch inspection reports
Installation Guidelines
  1. Disassembly: Remove the slave cylinder from the transmission. Remove the push rod, boot, and piston assembly.
  2. Inspection: Inspect the cylinder bore for scoring, pitting, or corrosion. If damaged, replace the entire assembly.
  3. Cleaning: Clean all components with clean brake fluid or approved brake cleaner.
  4. Lubrication: Coat the new seals and cylinder bore with clean brake fluid before assembly.
  5. Assembly: Install the new cup seal with the sealing lip facing the hydraulic pressure source.
  6. Installation: Install the slave cylinder onto the transmission. Tighten bolts to 37 N·m.
  7. Adjustment: Verify push rod play is approximately 2 mm (0.1 in).
  8. Bleeding: Bleed the clutch hydraulic system completely to remove air.
  9. Pedal Test: Pump the clutch pedal several times to verify proper operation.
Maintenance Schedule
  • Every 10,000 km: Check clutch fluid level and condition
  • Every 40,000–50,000 km: Inspect clutch operation and slave cylinder travel
  • Every 2 years: Replace clutch fluid regardless of mileage
  • When clutch pedal feels spongy: Inspect slave cylinder seals immediately

Company Details

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,

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 from Quality China Factory
  • 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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  • Yimi (Guangzhou) Automotive Parts Co, Ltd
  • Unit 1313, Building 5, Changsheng DDP Fashion Center, No. 17 Dachi Road, Tancun, Shijing Subdistrict, Baiyun District, Guangzhou City.
  • https://www.isuzucarsparts.com/

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