Part of the Yanmar Repair Manuals.
Chase a C30R-2 that will not travel straight and you end up at the HST pump with a pressure gauge, needing the relief valve set point before anything you measure means a thing. That number, 27.46 MPa on the high pressure side, is in this book, along with the rest of the figures Yanmar published for the C30R-2 crawler carrier and its 3TNV88-FFW diesel.
The 344 page factory service manual works through the engine (valve clearance, injector pop pressure, main and rod bearing torque), the HST piston pump and motor, travel controls, tracks, and vehicle electrics, with removal and installation steps, service standards, and troubleshooting charts for machine, engine, and panel electrics.
It downloads as a bookmarked PDF in English. Print the pages you need, take them to the bench, and put the engine or the pump back together to the factory clearances.
What's Inside This Yanmar C30R-2 Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | 9-21 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment |
| Technical Data | 23-35 | Machine Specifications, Machine Dimensions, Power Transmission Mechanical Diagram, Hydraulic Circuit Diagram, Electric Wiring Diagram, Weight of Components |
| Service Standards | 37-53 | Machine Performance, Power Train Equipment, Undercarriage, Control Devices, Hydraulic Cylinder, Work Implement |
| Engine | 55-140 | General (How to Read This Manual, Engine External Views, Structural Description, Exhaust Gas Emission Regulation) |
| Structure and Operation | 141-156 | Component Parts Overview, Power Transmission Mechanism, Steering Mechanism, Auxiliary Equipment for Brake, Engine Start/Stop Circuit, Hydraulic Equipment Layout |
| Hydraulic Equipment | 157-223 | H.S.T. Piston Pump, H.S.T. Piston Motor, H.S.T. Troubleshooting, Control Valve Operation, Flow Divider, Pressure Adjustment |
| Adjustment and Repair | 225-310 | Electric Equipment of Vehicle, Undercarriage Removal/Installation, Controls Assembly/Adjustment, Power Transmission Removal/Installation, Hydraulic Equipment Removal/Installation |
| Periodic Inspection and Servicing | 311-314 | Daily Checks, 50/100/250/500/1000 Hour Service Intervals, Engine Oil, Fuel System, Cooling System, Hydraulic System, Undercarriage, Steering Equipment |
| Fuel, Lube Oil and Grease Recommended | 315-317 | Fuel Types, Engine Oil Grades, Hydraulic Fluid Types, Transfer Case Oil, Final Case Oil, Fluid Capacities, Antifreeze Mixture Ratios |
| Troubleshooting | 319-342 | Non-Breakdowns, Precautions for H.S.T. Troubleshooting, Machine and Engine Troubleshooting Charts, Electrical Equipment on Panel Troubleshooting Charts |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Track roller nut tightening torque | 393 to 441 N•m (40 to 45 kgf-m) | p. 245 |
| Engine mount vibroisolating rubber nut M12 tightening torque | 45 to 58 N•m | p. 51 |
| Engine to engine mount M10x30 (10.9T) bolt tightening torque | 64 to 73 N•m | p. 51 |
| Hydraulic suction filter / return filter replacement interval | 1st time (then regularly) | p. 313 |
| Fuel filter filtration area | 310 cm2 | p. 28 |
| Fuel filter element replacement interval | Every 250 hours | p. 87 |
| Hydraulic oil tank capacity | 5.0 Gal. (19 L) <Tank: 3.4 Gal. (13 L), Others: 1.6 Gal. (6 L)> | p. 26 |
| Hydraulic fluid type | ISO VG46 | p. 317 |
| Traveling speed (Forward Low 1st) | 0 to 2.5 MPH (0 to 4 km/hr) | p. 25 |
| Track deviation standard | 20 in. (500 mm) or less | p. 39 |
| Hydraulic cylinder air release procedure (extension/retraction distance) | 1.97 to 3.9 in. (50 to 100 mm) | p. 21 |
| Hydraulic cylinder air release procedure (slow extension/retraction repetitions) | 4 to 5 times | p. 21 |
Yanmar C30R-2 Common Problems This Manual Covers
Machine will not travel straight
When the C30R-2 pulls to one side or wanders on takeoff, the fault usually sits in the HST circuit or the travel control adjustment. The Hydraulic Equipment section walks through HST troubleshooting and pressure adjustment for the piston pump and motor.
Manual Section: Hydraulic Equipment p. 157Weak travel until the oil warms
Cold hydraulic oil makes the drive feel down on power until the machine reaches operating temperature. The Troubleshooting section separates non-breakdowns like this from real faults before you start pulling components.
Manual Section: Troubleshooting p. 319Hard starting or low engine power
On the 3TNV88-FFW, check compression, valve clearance, and injector pop pressure (standard is 2850 to 2950 PSI) before condemning the injection pump. The Engine section carries the inspection and adjustment procedures plus a quick reference troubleshooting table.
Manual Section: Engine p. 55Thrown tracks or worn track rollers
Track deviation beyond spec and loose roller hardware lead to thrown tracks and fast roller wear. Adjustment and Repair covers track component removal and installation, including the track roller nut torque of 393 to 441 N-m.
Manual Section: Adjustment and Repair p. 225Spongy hydraulics after component replacement
Air left in the circuit after changing a pump, cylinder, or hose shows up as jerky, spongy response. The cautions at the front of the manual give the exact air release routine: slow cylinder strokes four to five times, then full strokes three to four times.
Manual Section: General Cautions for Maintenance Work p. 9Electrical faults and panel warning lights
Corroded connectors and a failing parking brake solenoid can mimic hydraulic trouble and stop travel outright. Trace the circuit with the electric wiring diagram in Technical Data, then confirm the fault against the panel troubleshooting charts.
Manual Section: Technical Data p. 23Contaminated oil and clogged filters
Skipped filter changes put grit through the HST loop, and the pump pays for it. Periodic Inspection and Servicing lays out the daily checks and the 50 through 1000 hour intervals, with the fuel filter element due every 250 hours.
Manual Section: Periodic Inspection and Servicing p. 311Frequently Asked Questions
Which machine and engine does this manual cover?
The Yanmar C30R-2 crawler carrier with the 3TNV88-FFW diesel engine. All 344 pages are in English and cover the engine, HST hydraulics, travel controls, tracks, and vehicle electrical system for this model.
Does it include a wiring diagram?
Yes. The Technical Data section includes the electric wiring diagram along with the hydraulic circuit diagram, power transmission diagram, machine specifications, dimensions, and component weights. p. 23
Does it cover the HST pump and motor?
Yes. The Hydraulic Equipment section covers the HST piston pump and motor, control valve operation, the flow divider, pressure adjustment, and HST troubleshooting, including relief valve set pressures of 27.46 MPa high and 1.96 MPa low. p. 157
Are torque specs and service limits included?
Yes. Service Standards lists tightening torques for the machine and engine plus wear limits for the power train, tracks, controls, and hydraulic cylinders. Engine rebuild figures, such as main bearing cap bolt torque of 69.0 to 76.0 ft-lbf, appear in the Engine section. p. 37
What do I get after purchasing this Yanmar C30R-2 manual?
Immediate download of the complete 344-page searchable Service Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Are there any print restrictions on this manual?
Yes, print as many copies as you want, and there are no restrictions. Many mechanics print the section they need and bring it to the shop floor.
Are there hydraulic schematics in this Yanmar C30R-2 manual?
Included. Hydraulic system schematics cover all circuits, control valves, and component specifications for the Yanmar C30R-2.
Reviews
There are no reviews yet.