Target User:
Owners, operators, and mechanics of Bolens Iseki G152, G154, G172, and G174 diesel tractors requiring in-depth service information.
Value Proposition:
Provides essential technical data for maintaining and repairing these specific tractor models, crucial for maximizing uptime and ensuring optimal performance. Essential for DIY repairs and workshop diagnostics.
Manual Utility:
Detailed illustrations, exploded views, schematics, and step-by-step instructions make complex procedures accessible.
Engine Systems:
Diesel engine overhaul, fuel system (injection pump, injectors, filters), cooling system, lubrication system, air intake system, exhaust system, starting system, electrical system (alternator, starter).
Transmission Systems:
Gearbox overhaul, clutch service, PTO operation and maintenance, differential and final drives.
Hydraulic Systems:
Hydraulic pump, control valve, cylinders (lift, steering), hydraulic fluid specifications, troubleshooting and repair.
Chassis And Steering:
Front axle, rear axle, steering system (mechanical/power assisted), braking system (drum/disc, adjustment, hydraulic components).
Electrical Systems:
Wiring diagrams, lighting system, instrument panel, battery maintenance, fuse/relay identification.
Body And Operator Station:
Fender maintenance, seat adjustment, operator controls layout and function.
Maintenance Procedures:
Routine checks, oil changes, filter replacements, lubrication points, coolant checks, battery care, tire pressure.
Repair Procedures:
Step-by-step disassembly, inspection, repair, and reassembly instructions for all major components.
Troubleshooting Guides:
Diagnostic tables and procedures for common problems and their solutions.
Adjustment Procedures:
Valve adjustments, brake adjustments, clutch pedal adjustment, PTO engagement.
Torque Specifications:
Precise torque values for critical fasteners during assembly and disassembly.
Depth Of Coverage:
Detailed, comprehensive coverage suitable for professional technicians and experienced DIY mechanics. Includes internal component specifications and overhaul procedures.
Engine Type:
3-Cylinder, 4-Stroke, Water-Cooled Diesel Engine
Engine Models Covered:
Likely Iseki E380 series or similar small displacement diesel engines (e.g., E385).
Estimated Horsepower:
Approx. 15 HP for G152/G154, Approx. 17 HP for G172/G174. (Actual specifications depend on specific engine variant).
Displacement:
Typically around 1.3L to 1.7L (dependent on specific engine model).
Injection System:
Direct Injection with Rotary Injection Pump (e.g., Bosch VE or similar).
Fuel Filter Type:
Spin-on or Cartridge type diesel filter.
Transmission Type:
Manual Synchromesh Transmission with High/Low range (e.g., 8-speed forward, 2-speed reverse).
Optional Transmission:
Creep speed gear option or shuttle shift transmission may be available on some variants.
Pto Speeds:
Standard 540 RPM PTO, potentially a 540/1000 RPM dual speed option.
Transmission Fluid:
Universal Tractor Transmission Fluid (UTTF) or API GL-4 gear oil meeting specified viscosity (e.g., SAE 80W-90 or SAE 10W-30 depending on temperature).
Rollover Protection:
ROPS (Roll-Over Protective Structure) is standard or an available option, requiring seatbelt use.
Braking System:
Internal expanding shoe brakes (drum brakes) on rear wheels, foot-operated with independent or linked operation.
Operator Seat:
Suspended or adjustable operator seat with safety belts.
Infotainment System:
N/A (Basic utility tractor, no infotainment features).
Driver Assistance Features:
N/A (Basic utility tractor, no electronic driver assistance).
Connectivity Options:
N/A (No electronic connectivity features).
Engine Oil Change:
Every 100 or 250 operating hours, or annually (refer to manual for exact interval).
Fuel Filter Replacement:
Every 250 operating hours or as needed.
Air Filter Cleaning Replacement:
Check every 50 hours, clean/replace as needed, typically replace every 250-500 hours.
Engine Oil Type:
API CD/CE/CF or higher, SAE 10W-30 or 15W-40 diesel engine oil.
Engine Oil Capacity:
Approx. 4.5 - 5.5 Liters (check dipstick).
Coolant Type:
Ethylene Glycol based antifreeze/coolant (50/50 mix with distilled water).
Hydraulic Fluid Type:
Universal Tractor Transmission Fluid (UTTF) or ISO VG 46 hydraulic oil if specified.
Common Wear Items:
Clutch wear, PTO clutch wear, hydraulic pump wear, starter motor brushes, coolant seals/hoses, seat suspension components.
Fuel System Potential:
Clogged fuel filters, injector pump issues due to fuel quality, air in fuel lines.
Electrical Issues:
Corroded connections, faulty starter solenoids, battery terminal issues.
Brand Origin:
Bolens, an American brand with a long history in garden tractors and compact equipment, partnered with Iseki of Japan for many of its tractor models.
Common Era:
These models are generally from the late 1980s to early 2000s, representing a generation of reliable, compact utility tractors.
Manufacturing Location:
Likely manufactured in Japan by Iseki for the Bolens brand.
