Category:
Light Commercial Vehicle / Truck Service Manual
Competitors:
Manuals for similar-class trucks from manufacturers like Mitsubishi Fuso, Hino, and Nissan Diesel (UD).
Value Proposition:
Provides in-depth technical information for the Isuzu NHR 4H Series engine, enabling efficient maintenance, troubleshooting, and repair.
Delivery Method:
Instant Download, eliminating shipping costs and delays.
Primary Focus:
Engine Workshop Service and Repair
Engine Component Overhaul:
Detailed instructions for disassembling, inspecting, measuring, and reassembling major engine components such as cylinder heads, pistons, connecting rods, crankshaft, and camshafts.
Type:
Workshop Service Repair Manual
Engine Mechanical:
Complete engine overhaul, disassembly, assembly, inspection, and testing.
Engine Management:
Fuel injection system, ignition system (if applicable), emissions control systems, sensors, actuators, and ECU diagnostics.
Cooling System:
Radiator, water pump, thermostat, hoses, fan, and coolant specifications.
Lubrication System:
Oil pump, oil filter, oil pan, oil passages, and lubrication intervals/specifications.
Air Intake System:
Air filter, intake manifold, turbocharger (if applicable), and intercooler.
Exhaust System:
Exhaust manifold, catalytic converter, muffler, and emissions components.
Turbocharger System:
Inspection, diagnosis, removal, and installation of the turbocharger and associated piping and intercooler.
Scheduled Maintenance:
Detailed instructions for routine maintenance tasks and service intervals.
Diagnostics:
Troubleshooting guides, diagnostic trouble codes (DTCs), and step-by-step diagnostic procedures.
Repair And Rebuild:
Comprehensive instructions for component removal, installation, repair, and complete engine rebuilds.
Torque Specifications:
Precise torque values for all critical fasteners and components.
Special Tools:
Identification and usage instructions for specialized tools required for specific repair procedures.
Timing Belt Chain:
Procedures for timing belt or timing chain inspection, replacement, and setting.
Electrical System Engine:
Engine-related electrical schematics, sensor testing, starter motor, alternator, and battery system diagnostics.
Emission System Repair:
Repair procedures for EGR systems, sensors related to emissions, and catalytic converters/DPFs if equipped.
Depth:
Comprehensive, covering everything from basic maintenance to complete engine overhauls and advanced diagnostics.
Diagnostic Tools:
Coverage of diagnostic trouble codes (DTCs) and methods for reading them, often implying the use of a scan tool or diagnostic connector.
Engine Family:
Isuzu 4H Series
Engine Type:
Typically Diesel, Inline-4 Cylinder (specific configurations vary by model year and application)
Engine Aspiraton:
Naturally Aspirated and Turbocharged variants exist within the 4H family.
Engine Block Material:
Typically cast iron block for durability in diesel applications.
Cylinder Head Material:
Typically aluminum alloy or cast iron.
Displacement Range:
Commonly 2.8L to 3.1L (e.g., 4JH1, 4JG2 - specific variants covered by the manual are implied by '4H Series')
Horsepower Range:
Varies by specific engine variant and market, typically 80-120 HP.
Torque Range:
Varies by specific engine variant and market, typically 150-200 lb-ft.
Injection System:
Likely Direct Injection, possibly Common Rail Diesel (CRDi) depending on the specific 4H variant and year.
Emission Control:
May include EGR (Exhaust Gas Recirculation), DPF (Diesel Particulate Filter), or other emission control technologies depending on year and region.
Transmission Type:
Manual Transmission (common in light commercial vehicles of this era).
Transmission Type Optional:
Some models might offer an Automatic Transmission option, depending on market and specific NHR configuration.
Gear Count:
Typically 5-speed manual transmissions for these models.
Chassis Type:
Cab-over (COE) or conventional chassis depending on NHR variant.
Gvw Range:
GVWR varies significantly by NHR model, often in the 3,500 kg to 7,000 kg (7,700 lbs to 15,400 lbs) range for light-duty applications.
Oil Change Interval:
Typically every 5,000 to 10,000 km (3,000 to 6,000 miles) or 6-12 months, subject to operating conditions. Specifics in manual.
Air Filter Interval:
Inspection every 10,000-20,000 km (6,000-12,000 miles), replacement as needed or based on contamination. Specifics in manual.
Fuel Filter Interval:
Typically every 20,000 to 40,000 km (12,000 to 24,000 miles) or annually. Specifics in manual.
Engine Oil Type:
API CI-4 or higher, SAE 15W-40 or 10W-30 diesel engine oil recommended. Exact viscosity depends on ambient temperature. Specifics in manual.
Coolant Type:
Ethylene glycol-based coolant with corrosion inhibitors. Typically a long-life or OAT (Organic Acid Technology) coolant. Specifics in manual.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid. Specifics in manual.
Transmission Fluid Type:
GL-4 or GL-5 gear oil for manual transmissions. Automatic transmission fluid (ATF) for automatics. Specifics in manual.
Coolant Capacity:
Coolant capacity varies by engine size and cooling system configuration, typically in the range of 7-10 liters. Exact capacity specified in manual.
Engine Oil Capacity:
Engine oil capacity for 4H series engines typically ranges from 5 to 8 liters. Exact capacity specified in manual.
Common Wear Items:
Glow plugs (diesel starting), fuel injectors, turbocharger seals (if equipped), EGR valve, clutch components, suspension bushings.
Diesel Specific Concerns:
Potential for carbon buildup in intake manifold and EGR system, injector nozzle clogging, diesel particulate filter regeneration issues (on newer models).
Turbocharger Failures:
Bearing wear, seal leaks, and actuator malfunctions are common potential issues if oil starvation or contamination occurs.
Brand Focus:
Isuzu is renowned globally for its expertise in diesel engines and commercial vehicles.
Series Context:
The NHR series is part of Isuzu's long-standing lineage of light-duty trucks and commercial vehicles, known for reliability and durability.
Nhr Variants:
The NHR series has seen various iterations, often distinguished by cabin styles (single, crew), wheelbase, and payload capacities, all powered by variations of the 4H diesel engine family.
Manufacturing Regions:
Isuzu vehicles, including the NHR series, are produced in various global locations, with significant manufacturing in Japan and other Asian countries.
