Part of the Yanmar Repair Manuals.
All 697 pages of this Yanmar C30R-3 Crawler Carrier Service Manual (OEM #0BKC2-EN0060) come straight from the factory, covering the diesel engine, full HST hydraulic system, travel motor, swing motor, control valve, and wagon assemblies. Inside: wiring diagrams, a complete hydraulic circuit schematic tracing fluid routing through every pump and pilot valve, and a full error code diagnostic section for engine ECU and machine faults. You also get a service standards chapter loaded with torque tables for hydraulic fittings and engine fasteners, plus step-by-step adjustment and repair procedures across the engine, undercarriage, controls, hydraulic equipment, and wagon. Set the parking brake release pressure to 406 PSI (2.8 MPa) and fill the hydraulic system to 38L (three-side flaps wagon) or 40L (swing wagon type) before startup. Your carrier is down. Bookmarked for instant navigation, search any spec by keyword and get back to work.
What's Inside This Yanmar C30R-3 Manual
| System | Pages | Key Topics |
|---|---|---|
| Spine | 2 | - |
| General Cautions for Maintenance Work | 13-26 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment |
| Technical Data | 27-54 | 2-1 Specifications, 2-2 Outline Drawing and Working Area, 2-3 Weight List of Main Parts, 2-4 Power Transmission, 2-5 List of Periodic Inspection and Servicing, 2-6 Fuel |
| Service Standards | 55-84 | Machine Performance (Three-Side Flaps Wagon Type, Swing Wagon Type), Engine (Nominal and Allowable Values), Undercarriage, Controls, Hydraulic Cylinder, Work Implement |
| Engine | 85-259 | 4-1 Safety, 4-2 Engine, 4-3 Fuel System, 4-4 Cooling System, 4-5 Lubrication System, 4-6 Starter Motor, 4-7 Alternator, 4-8 Electronic Control System |
| Electric System | 260-315 | 5-1 Electric Equipment of Machine, 5-2 Circuit Description of Engine Start and Stop, 5-3 vCircuit Description of Engine Start and Stop, 5-4 Engine ECU (Engine Controller) |
| Hydraulic System | 316-522 | 6-1 Outline, 6-2 Component Parts, 6-3 Circuit Operation, 6-4 Hydraulic Pump (HST), 6-5 Travel Motor, 6-6 Swing Motor, 6-7 Control Valve, 6-8 Pilot Valve |
| Adjustment and Repair | 523-672 | 7-1 Engine and Electric Equipment, 7-2 Undercarriage, 7-3 Controls, 7-4 Hydraulic Equipment, 7-5 Wagon |
| Troubleshooting | 673-697 | 8-1 Troubleshooting |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydraulic oil capacity (Three-side flaps wagon type) | 10 Gals (38 L) | p. 39 |
| Hydraulic oil capacity (Swing wagon type) | 10.6 Gals (40 L) | p. 39 |
| Air cleaner filtration area | 12.8 sq.ft. (1.19 sq.m) | p. 30 |
| Air cleaner element replacement interval | Every 500 hrs | p. 37 |
| Parking brake release pressure | 406 PSI (2.8 MPa) | p. 27 |
| Hydraulic pump maximum working pressure | 4978 PSI (34.3 MPa) | p. 27 |
| Travel motor displacement (Low/High) | 2.06 in3/rev (33.8 cm3/rev) / 1.03 in3/rev (16.9 cm3/rev) | p. 28 |
| Track roller shaft A wear limit | Ø2.439 in. (Ø61.69 mm) | p. 66 |
| Sprocket A wear limit | 0.91 in. (23 mm) | p. 66 |
| Machine not moving straight after travel/brake service or hydraulic work | Perform air bleeding (follow steps 1 and 3 to 12 on page 21) and warm-up before travel if at low hydraulic oil temperatures. | p. 22 |
| Hydraulic oil overflow during air release | Hydraulic oil begins to overflow through the air breathers (3, 4, 5, and 6) | p. 21 |
| Rubber track A wear limit | 0.32 in. (8 mm) | p. 66 |
Yanmar C30R-3 Common Problems This Manual Covers
Yanmar C30R-3 won't travel straight after hydraulic or brake service, pulls hard to one side
Perform the air-bleeding cycle on page 21 repeatedly: run forward, then reverse travel until the machine tracks straight. Verify hydraulic oil is at the correct level for the 38 L (10 gal) total system capacity shown on page 39 after each cycle. Warm the machine to operating temperature before the final straight-travel test per page 22.
Manual Section: General Cautions for Maintenance Work p. 22Travel is weak, jerky, or carrier does not respond normally in forward or reverse
Verify charge relief pressure is at 2.8 MPa (406 PSI) as spec'd on page 27. Disconnect and reconnect the parking-brake solenoid harness, then test forward and reverse travel separately. If pressure holds but travel stays sluggish, inspect travel motor displacement against the 33.8 cm3/rev low-speed value on page 28 and work through the HST troubleshooting chart on page 673.
Manual Section: HST System Relationship Troubleshooting p. 673Hydraulic oil overflows through breathers during air bleeding after service, tank level drops
Follow the numbered air-release sequence; oil overflowing through breathers 3, 4, 5, and 6 on page 21 is the signal that each circuit is purged, not a sign of overfill. Stop at overflow, re-tighten each breather, then top up to the 38 L (10 gal) system capacity on page 39 and recheck level before startup.
Manual Section: General Cautions for Maintenance Work p. 21Parking brake solenoid harness disconnected during repairs, carrier won't release or move on one side
Reconnect the parking-brake solenoid harness fully before any travel test. Measure brake release pressure; it should reach 2.8 MPa (406 PSI) per the spec on page 27. If both tracks engage but one side drags or won't turn, run the complete travel-motor checks beginning on page 673 before condemning the solenoid or motor.
Manual Section: Travel Motor TroubleshootingRubber tracks worn below spec or undercarriage vibrating excessively during loaded carrier operation
Inspect rubber track lug height and replace if worn below the 0.32 in. (8 mm) wear limit on page 66. Measure track roller shaft diameter against the Ø61.69 mm minimum at the same time. On reassembly, torque sprocket bolts to 138 to 151 ft·lbf (186 to 206 N·m) per page 73.
Manual Section: Service Standards p. 66Frequently Asked Questions
How quickly can I access this Yanmar C30R-3 manual after buying?
A 697-page Service Manual in searchable PDF format (144 MB), available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Can I print specific sections of this Yanmar C30R-3 Service Manual?
Zero restrictions. The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
Does this Yanmar C30R-3 manual include hydraulic schematics?
Yes, complete hydraulic schematics with flow diagrams, valve configurations, and pressure specifications are included.
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