Part of the Kubota Repair Manuals.
This Kubota Service Manual covers the angle dozer unit for the KX121-3 and KX161-3 excavators, publication number 97899-60550, in 24 pages. It is the factory workshop coverage for the KTC angle dozer blade, aimed at technicians servicing the blade and its hydraulics.
Inside you get machine quality specifications, dozer lubrication points, dozer and angle lever force and stroke figures, and a full breakdown of the control valve, including relief pressure settings and fitting torque values. The rotary joint assembly, hose connections, undercarriage parts, and the complete hydraulic circuit with relief pressures for the travel motor, swivel motor, and pump are all documented.
Use it when the dozer blade will not hold under load, the angle function drifts, or a fitting leaks after service. The manual downloads as a PDF and prints any page, so the pressure and torque numbers are on hand at the machine.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Machine Quality Specifications | 4 | Main Specifications, Dimensions, Working Performance, Hydraulic Performance, Lever Operating Force & Stroke |
| Lubrication Point of Angle Dozer | 5 | Boom Bottom Linkage, Arm Bottom Linkage, Bucket Link Pin, Boom Cylinder Boss, Dozer Cylinder Boss, Angle Pin |
| Dozer Lever | 6-8 | Dozer Angle Operation, Angle |
| Control Valve | 9-14 | Specifications, General View of Control Valve, Control Valve Circuit Diagram, Angle Section, Adaptor Installation |
| Rotary Joint | 15-17 | Assembling of the Rotary Joint, Adaptor Installation, Hose Connection |
| Under Carriage | 18-20 | Angle Dozer, No. Part No. Part Name, View E, View D |
| Hydraulic Circuit | 21-24 | KX121-3 Hydraulic Circuit, Relief Pressure, Travel Motor, Swivel Motor, Pump |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| KX121-3 | ||
| Spool stroke (Mechanism operating section) | 7 mm 0.28 in | p. 9 |
| Spool stroke (Pilot operating section) | 7 mm 0.28 in | p. 9 |
| Tightening torque for fitting with 2-PF1/2 JIS O-PING TYPE (T2,T3) | 28.8~32.5 ft lbs | p. 11 |
| Tightening torque for fitting with 20-PF3/8 JIS O-RING TYPE (A1~A10,B1~B10) | 19.9~22.1 ft lbs | p. 11 |
| Hose, hydraulic (050) length | 460 mm | p. 17 |
| Hose, hydraulic (050) cap size | G1/4 - G1/4 | p. 17 |
| KX121-3 Angle blade type | ||
| Operating weight (Canopy) | 9080 lbs | p. 3 |
