Part of the Kubota Repair Manuals.
This is the Kubota M135X-S workshop manual supplement (publication 9Y121-04100), covering the additional and altered functions of the M135X-S tractor compared with the base M135X. It runs 126 pages and is built around the V6108-TIE3 diesel engine, with the front suspension system as its main focus.The supplement documents the front axle structure and servicing, the hydraulic system that drives the front suspension including the pump, priority valve, suspension cylinder, valve and accumulator, and the electrical system with its suspension ECU and switch modes. You get servicing specifications, tightening torques, and step-by-step disassembly.Mechanics use this PDF alongside the base M135X workshop manual to service the suspension, hydraulic, and electrical hardware unique to the M135X-S, with grounded torque and pressure figures.
What's Inside This Kubota M135X-S Manual
| System | Pages | Key Topics |
|---|---|---|
| Si Information | 3-10 | Safety First, Safety Decals, Specifications, Dimensions |
| Sg General | 11-25 | Lubricants, Fuel and Coolant, Maintenance, Check and Maintenance (Check Point: 100 Hours, 1500 Hours, 2 Years), Special Tools (Tractor) |
| S6 Front Axle | 26-40 | Structure, 4-Wheel Drive Type, Front Suspension, Propeller Shaft, Drive Case, Preparation for Removing the Front Axle, Front Axle Case, Main Frame |
| S8 Hydraulic System | 41-92 | Structure, Suspension Cylinder Position, Hydraulic Circuit, Components (Hydraulic Pump, Flow Priority Valve, Suspension Cylinder, Suspension Valve, Accumulator) |
| S9 Electrical System | 93-126 | General (Front Suspension Outline, Outline, Front Suspension Control System), ECU (Connector), Suspension Switch (on Mode, Lock Mode, Auto Lock Mode) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Transmission case capacity | 60 L / 63.4 U.S.qts / 52.8 Imp.gals | p. 13 |
| Transmission case lubricant type | KUBOTA UDT or SUPER UDT fluid* | p. 13 |
| Pump for power steering flow rate (Above 60.0 L/min.) | 15.8 U.S.gals/min. / 13.2 Imp.gals/min. | p. 47 |
| Main Relief Valve Setting Pressure (Above 1000 min-1 (rpm)) | 16.7 to 17.5 MPa / 171 to 178 kgf/cm² / 2430 to 2530 psi | p. 66 |
| Engine Oil Capacity (with filter) | 14.6 L | p. 9 |
| Fuel Tank Capacity | 190 L | p. 9 |
| Max. lifting force (at lift points) | 2635 kg | p. 9 |
| Remote hydraulic control system pressure | 19.7 MPa | p. 9 |
| Front Frame Plate Allowable Concave Depth | 2.0 mm | p. 32 |
| Main Frame Pin Allowable O.D. | 33.000 mm | p. 32 |
| Flange yoke mounting screw torque (M14, 7T) | 124 to 147 N·m | p. 33 |
| Regulator Valve Setting Pressure (At Maximum Engine Speed) | 2.75 to 2.94 MPa | p. 66 |
Kubota M135X-S Common Problems This Manual Covers
Front suspension hydraulics weak or erratic
Low or contaminated hydraulic oil, a worn pump, or a valve fault leaves the front suspension soft or unresponsive. The hydraulic system section covers the pump, flow priority valve, suspension cylinder, valve, and accumulator with their setting pressures.
Manual Section: S8 Hydraulic System p. 41Suspension will not switch modes
A faulty switch or ECU signal keeps the front suspension from moving between ON, LOCK, and AUTO LOCK modes. The electrical system section maps the suspension ECU connector and the switch mode logic.
Manual Section: S9 Electrical System p. 93Front axle play or wear
Worn bushings, pins, or thrust collars introduce play in the 4-wheel-drive front axle over time. The front axle section gives servicing specifications, allowable wear limits, and the disassembly sequence.
Manual Section: S6 Front Axle p. 26Loose front axle or frame fasteners
Fasteners backed off to the wrong torque let the front frame and axle components shift under load. The front axle section lists the tightening torques, including the flange yoke mounting screw at 124 to 147 N-m.
Manual Section: S6 Front Axle p. 26Incorrect suspension accumulator charge
An accumulator charged outside its specified pressure changes ride quality and cylinder behavior. The hydraulic system section gives the accumulator extension pressure of 2.9 to 3.0 MPa and the regulator valve setting pressure.
Manual Section: S8 Hydraulic System p. 41Missed periodic service on the suspension system
Skipping the scheduled checks lets hydraulic and mechanical wear go unnoticed until a fault appears. The general section sets the check-and-maintenance points at 100 hours, 1500 hours, and 2 years.
Manual Section: Sg General p. 11Frequently Asked Questions
Is this the full M135X manual or a supplement?
It is the M135X-S workshop manual supplement, publication 9Y121-04100. It covers the functions unique to the M135X-S and refers you to the base M135X workshop manual (9Y021-02691) for shared content.
What systems does this supplement cover?
It covers the front axle, the hydraulic system driving the front suspension, and the electrical system with the suspension ECU and switches, plus general maintenance, specifications, and tightening torques. p. 26
What is the main relief valve setting pressure?
The hydraulic system section lists the main relief valve setting pressure at 16.7 to 17.5 MPa (2430 to 2530 psi) above 1000 rpm, along with the regulator and accumulator pressures. p. 41
Does it include front axle torque and wear specs?
Yes. The front axle section provides servicing specifications, allowable wear values such as the main frame pin outside diameter, and tightening torques for the axle and frame fasteners. p. 26
How will I receive this Kubota M135X-S Workshop Manual?
A 126-page Workshop Manual in searchable PDF, ready the moment checkout completes. Open it on a computer, tablet, or phone, with no shipping wait.
Am I able to print pages from this manual?
Yes. Print as many copies as you want, with no restrictions. Plenty of mechanics print just the section they need and carry it to the shop floor.
Can I find hydraulic circuit diagrams in this Kubota M135X-S manual?
Yes. The manual includes hydraulic circuit diagrams, system schematics, and component specifications with pressure ratings.
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