Pre-Assembled Brake Master Vacuum Assembly with Diesel-Specific Vacuum System and Tandem Hydraulic Circuit for ISUZU NKR77 4JH1

The brake master vacuum assembly (also referred to as brake booster assembly or vacuum servo unit) carrying OEM numbers 8-97162798-1 and 8971627981 integrates the vacuum brake booster and the hydraulic master cylinder into a single pre‑assembled unit. It is a direct bolt‑on replacement for ISUZU NKR77 series light‑duty trucks powered by the 4JH1 3.0L turbo‑diesel engine, as well as related chassis such as NLR85, NPR75, and certain 100P/600P variants.

This ISUZU NKR77 brake master vacuum assembly 8-97162798-1 directly replaces the factory unit in the following configurations:

The NKR77 was widely exported to Southeast Asia, the Middle East, Africa, Latin America, and Australia under various badges. The 4JH1 engine is known for its reliability, but the brake booster diaphragm – subjected to constant vacuum cycling – is a wear component that typically requires replacement between 200,000 and 350,000 km.

• Pre‑Assembled Unit Saves Workshop Labor Time – Ready for bolt‑on installation, reducing labor time by approximately 30–40 minutes
• Diesel‑Specific Vacuum System Compatibility – Designed for engine‑driven vacuum pumps with lower vacuum reserve levels
• Tandem Hydraulic Circuit – Fail‑Safe Design – Dual‑circuit design maintains braking function if one circuit fails
• Pushrod Projection Pre‑Set – Factory specification eliminates adjustment steps and prevents brake drag
• ISO/TS16949 Certified Manufacturing – Automotive industry quality standard with batch traceability
• Corrosion‑Resistant Materials – Coating tested to 96 hours salt spray with no red rust
• Compatible with ISUZU Engine‑Driven Vacuum Pump – No adapter or hose modification required

• One assembly addresses both vacuum booster and master cylinder failures
• Covers multiple ISUZU chassis with one SKU
• No core return hassle – new assembly, no deposit required
• Reduces diagnostic time for hard brake pedal complaints
• Sealed packaging for export with moisture-resistant VCI bag

• Individual packaging: VCI sealed bag inside foam‑lined carton
• Carton dimensions: 33 * 28 * 22 cm (approximate) per unit
• Net weight: Approximately 3.2–3.5 kg; gross weight (with packaging): approximately 4.8 kg
• Master carton: 6 units per export carton (palletizable)
• Lead time: 3–7 working days for stock orders; 15–20 days for production orders above 100 pieces
• Minimum order quantity: 1 piece (sample order available)
• Shipping methods: FedEx, UPS, DHL for samples and small orders; sea freight (LCL/FCL) from Shanghai, Ningbo, or Guangzhou ports
• H/S Code: 8413.30

The ISUZU NKR77 4JH1 brake master vacuum assembly 8-97162798-1 is a pre‑assembled, OEM‑specification replacement that combines the vacuum brake booster and tandem master cylinder into a single unit. It is a direct fit for 2002–2006 NKR77, NLR85, NPR75, 100P TC, and 600P trucks powered by the 4JH1 3.0L turbo‑diesel engine. Pre‑set pushrod projection and ISO/TS16949 certified manufacturing ensure consistent quality. One SKU covers multiple ISUZU chassis.

Order a sample unit today to verify fitment on your NKR77 chassis – the same assembly fits all 4JH1‑powered NKR77 trucks regardless of export market.