Part of the Kubota Repair Manuals.
This Kubota Workshop Manual covers the GZ410 and GZ460 gasoline engines. It is the factory service manual, publication number 9Y011-02190, running 71 pages, and it documents both the engine mechanism and the servicing procedures a technician needs.
The manual opens with safety instructions, then full specifications, performance curves, and dimensions for each engine. The mechanism section explains the engine body, lubricating, cooling, fuel, ignition, and electric systems, while the servicing section covers engine identification, tightening torques, troubleshooting, servicing specifications, and a maintenance schedule from daily checks to every 1000 hours.
Use it to set valve clearance and torque values, diagnose a no-start or overheating fault, follow the maintenance intervals, or rebuild the engine body with the correct factory specifications for the GZ410 and GZ460.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Specifications | Engine Type and Dimensions, Performance Ratings, Engine Components, System Details | |
| Performance Curves | GZ410 Performance Curve, GZ460 Performance Curve, Performance Curve Legend | |
| Dimensions | Engine Dimensions - Top View, Engine Dimensions - Side View, Engine Dimensions - Front View | |
| Mechanism | Engine Body (Cylinder Head, Combustion Chamber, Camshaft, Crankcase, Piston and Piston Rings, Connecting Rod, Crankshaft, Balancer, Flywheel) | |
| Servicing | General (Engine Identification, Tightening Torques, Tightening Torques for Special Use Screws, Bolts and Nuts, Tightening Torques for General Use Screws, Troubleshooting, Servicing Specifications, Engine Body, Lubricating System, Cooling System, Ignition System, Starting System, Maintenance Check List, Long Term Storage, Check and Maintenance, Daily Check, Check Point of Initial 20 Hours, Check Point of Every 50 Hours, Check Points of Every 200 Hours, Check Points of Every 500 Hours, Check Point of Every 1000 Hours, Check Points of Every 2 Years, Special Tools) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Rocker arm lock nut torque | 7.8 to 12.7 N-m | p. 28 |
| Cylinder head bolt torque | 24.5 to 32.4 N-m | p. 28 |
| Oil filter cartridge torque | 14.7 to 20.6 N-m | p. 28 |
| Oil filter cartridge replacement interval | Every 200 hours | p. 37 |
| Battery type | 12 V, 24AH or equivalent | p. 6 |
| Thermostat valve Opening Temperature | 69.5 to 72.5 °C | p. 35 |
| Temperature at which Thermostat completely Opens | 85 °C | p. 35 |
| Radiator Cap Air Leakage (pressure fall time) | 10 seconds or more (for pressure fall from 88 to 74 kPa) | p. 35 |
| Radiator Water Tightness (test pressure) | 177 kPa | p. 35 |
| Compression Ratio | 9.2:1 | p. 6 |
| GZ410 | ||
| Total Displacement, GZ410 | 404 cm³ (24.65 cu.in.) | p. 6 |
| GZ460 | ||
| Total Displacement, GZ460 | 456 cm³ (27.83 cu.in.) | p. 6 |
