Bolens Iseki G152, G154, G172, G174, TX1300, TX1500 Tractor Service Manual (P/N G152-001)

• Covers 1970s–1980s Bolens Iseki G152, G154, G172, G174, TX1300, and TX1500 compact tractor variants in both 2WD and 4WD configurations
• Original 127-page OEM publication, P/N G152-001 first edition
• Acts as the primary technical reference for the KE55, KE70, and KE75 diesel engine series used throughout the G-Series lineup
• Contains 48 exploded-view diagrams, 15 system-specific wiring schematics, and 12 detailed engine torque tables
• Delivers essential PDF data for workshop troubleshooting, heavy-duty repair, and mechanical diagnostics
• Details component-level teardowns for the fuel injection pump, steering system, front axle, differential gears, rotary hoe, and power take-off

Technical Documentation and Content

This Bolens Iseki G-Series service manual provides a comprehensive breakdown of major tractor assemblies, giving technicians the exact factory references needed for accurate diagnostics. By utilizing manufacturer-specified tolerances and clearances, this documentation directly accelerates bench work and prevents costly comebacks in the professional shop. Inside, you will find documented construction details for the engine, chassis, drivetrain, and hydraulic systems, visually supported by specific power train diagrams, lubrication charts, a cross section of the nozzle holder, and engine sectional views. Working on agricultural machinery involves significant physical hazards, so technicians must carefully review the integrated safety precautions before initiating any tear-down procedures. The publication outlines specific criteria for component removal, parts inspection, and reassembly standards covering the transmission, cooling, and electrical systems. Furthermore, the manual supplies step-by-step procedures that prevent expensive dealership visits, such as calibrating fuel injection timing via shims, adjusting drive pinion and ring gear backlash, centering brake shoes, and setting clutch pedal free play. It also includes a factory periodic maintenance chart to help shop owners schedule exact service intervals for engine oil, coolant, and hydraulic fluids.

Specification Highlights & Service Pitfalls

Precise engineering data is critical for proper tractor maintenance and reliable engine rebuilds. This manual delivers those exact figures directly from the manufacturer. For standard operation, engine compression pressure is rated at 455 psi (32 kg/cm²). Mechanics should note that the compression difference between cylinders must not exceed 35 psi (2.5 kg/cm²). Cylinder head bolt torque values range from 80 to 101 ft-lbs depending on the specific engine model. You will also find fluid capacities, such as the 4.2-liter coolant system requirement. Finally, the valve specification table dictates an intake valve clearance of 0.35 mm for cold engines.

Professionals overhauling these specific models must be aware of unique mechanical pitfalls outlined in the text. For instance, attempting to tap out the pressed-in piston pins on the KE55 and KE70 engine blocks with a hammer will severely distort the connecting rod; the factory strictly mandates utilizing a hydraulic press. Additionally, failing to perfectly align the main bearing oil holes with the crankcase marks prior to pressing them in will result in immediate oil starvation, as turning the bearing after installation is impossible.