Need factory-level depth on your Yanmar C50R-5 Crawler Carrier? This 589-page service manual covers the complete 4TNV94CHT turbocharged engine, HST drive system, hydraulic pump assemblies, and full electrical controls for the C50R-5. Inside: hydraulic circuit diagrams with full pump, travel motor, swing motor, and control valve routing; wiring diagrams covering the Engine ECU, T-ECU, LCD monitor, and alarm systems. You also get a complete troubleshooting section with HST fault diagnosis, DPF error codes, and a torque table for every critical fastener on the machine. Torque the track roller nuts to 294 to 324 N·m, swap fuel filters at 250-hour intervals, and replace the hydraulic line filter every 500 hours. Your machine is down. One download, keyword search, bookmarked sections. Pull it up on your phone and get back to work.
What's Inside This Yanmar C50R-5 Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | 12-27 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment |
| Technical Data | 28-47 | Specifications, Outside Drawing (Three-Side Flaps Wagon Type Model, Scoop-End Wagon Type Model, Swing Wagon Type Model), Main Parts Mass Chart, Power Transmission Mechanism |
| Service Standards | 48-71 | Machine Performance (Reference Value Table, Methods for Inspecting Performance), Engine, Servicing Standards for Parts of Undercarriage, Control Equipment |
| Engine | 72-259 | 4-1 Safety, 4-2 Engine, 4-3 Fuel System, 4-4 Cooling System, 4-5 Lubrication System, 4-6 Turbocharger, 4-7 Starter Motor, 4-8 Alternator |
| Electric System | 260-321 | Electrical Equipment of the Machine (Parts Layout of Electrical Equipment, LCD Monitor and Alarm Systems), Descriptions of Engine Start/Stop Circuit |
| Hydraulic System | 322-493 | 6-1 Outline, 6-2 Hydraulic Pump, 6-3 Gear Pump, 6-4 Travel Motor, 6-5 Swing Motor, 6-6 Control Valve, 6-7 Remote Control Valve, 6-8 Swivel Selector |
| Service Procedures for Individual Components | 494-575 | Engine Related Components (Radiator and Fan Belt, Fuel Tank, Removing and Installing the Engine, Removing and Installing the Engine ECU, Removing and Installing the T-ECU, Removing and Installing the DPF, Removing and Installing the Starting Motor) |
| Troubleshooting | 576-588 | 8-1 Troubleshooting, 8-2 HST Troubleshooting |
| Page Vierge | 589 | - |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Nuts installing track roller tightening torque | 217 to 238.7 ft·lbf (294 to 324 N·m) | p. 61 |
| Fuel oil Pre-filter replacement interval | Every 250 hours | p. 38 |
| Fuel oil filter element replacement interval | Every 250 hours | p. 38 |
| Hydraulic system suction filter cleaning interval | Every 250 hours | p. 38 |
| Hydraulic system line filter replacement interval | Every 500 hours | p. 38 |
| Hydraulic system return filter replacement interval | Every 500 hours | p. 38 |
| Hydraulic oil tank return filter replacement interval | Every 1000 hrs. (After first 50 hrs.) | p. 48 |
| Coolant check and resupply interval | Every 250 hours | p. 38 |
| YANMAR Super Long-Life Coolant (LLC anti-freeze) replacement interval | Every 2 years (autumn) | p. 39 |
| Track roller & shaft A diameter Standard | ø10.63 (270) in. (mm) | p. 56 |
| Track roller & shaft A diameter Allowable limit | ø10.24 (260) in. (mm) | p. 56 |
| Fuel temperature sensor installation tightening torque | 22 ± 2 N·m | p. 63 |
Yanmar C50R-5 Common Problems This Manual Covers
Yanmar C50R-5 loses travel power or stalls under load during operation p. 576
Check the HST troubleshooting procedures starting at page 576. Verify charge pressure reads 450 +73/-0 PSI (3.1 +0.5/-0 MPa) at the test port. If pressure is low, inspect the hydraulic suction filter for blockage (service every 250 hours per page 38) and check for air ingestion at pump inlet fittings.
Manual Section: HST TroubleshootingEngine temperature warning activates, coolant level drops repeatedly after extended operation p. 38
Check coolant level against the 18.0 Qts. (17 L) radiator capacity (page 40) and top up with Yanmar Super Long-Life Coolant, due for full replacement every 2 years in autumn (page 39). Inspect the fan belt for wear and tension. If the warning repeats, clean the radiator core and verify coolant flow at the sub tank, capacity 1.1 Qts. (1 L).
Manual Section: Cooling SystemEngine loses power gradually or runs rough, fuel filters past service interval p. 38
Replace the fuel pre-filter and filter element every 250 hours per the maintenance schedule on page 38. Torque new filter mounting bolts to 35-43 N·m (page 167). After swapping filters, prime the fuel system by cranking briefly, then verify full power returns at rated 2500 rpm. A dirty strainer typically starves the engine before the gauge drops.
Manual Section: Fuel SystemPoor tracking, one side pulls, or traction drops across uneven ground p. 57
Inspect sprocket tooth height against the 1.77 in. (45 mm) standard on page 57; replace when worn to 1.46 in. (37 mm). Measure track roller shaft diameter (standard ø10.63/270 mm, limit ø10.24/260 mm). Torque track roller mounting nuts to 217-238.7 ft·lbf (294-324 N·m, page 61) and confirm the hydraulic auto-tensioner shows no oil leaks.
Manual Section: Servicing Standards for Parts of UndercarriageLCD monitor shows alarm or instrument fault code, machine behavior changes unexpectedly p. 260
Note the exact fault code displayed and cross-reference it using the error code reference at page 14. Check the wiring diagram on page 45 to trace the affected sensor circuit. Inspect coolant temperature and fuel temperature sensor torque (22 ± 2 N·m, page 63) and connector seating before replacing any sensor or ECU.
Manual Section: Electric SystemHydraulic system pressure drops or performance degrades noticeably after extended use p. 38
Replace the hydraulic line filter and return filter every 500 hours, and clean the suction filter every 250 hours per page 38. Measure main hydraulic pressure at the test port: standard is 4980 +87/-0 PSI (34.3 +0.6/-0 MPa, page 48). Full hydraulic oil replacement is due every 1000 hours; fluid capacity details are on page 40.
Manual Section: Hydraulic SystemFrequently Asked Questions
What is the travel speed of the Yanmar C50R-5 tracked dumper?
The travel speed for the Yanmar C50R-5 tracked dumper is 0 to 5.72 MPH (0 to 9.2 km/hr) for both forward and reverse. This specification is listed under the main specifications of the machine in the technical data section.
What are the torque specs for the Yanmar C50R-5 engine and track components?
The manual provides detailed torque specifications for various components. For engine parts, cylinder head bolts are tightened to 135 ± 5.0 ft·lbf (13.8 ± 0.5 N·m) and connecting rod bolts to 54 +5 ft·lbf (5.5 +0.5 N·m). For track components, nuts installing track rollers require 217 to 238.7 ft·lbf (294 to 324 N·m), and bolts installing travel motors require 177.9 ft·lbf (241 N·m). General bolt torque values are also provided based on size.
What do Yanmar C50R-5 error codes mean?
The Yanmar C50R-5 service manual provides a comprehensive list of machine error codes, their classifications, descriptions, detection criteria, probable causes, and corrective measures in Section 5-6 "Error codes". For example, error code 9 indicates an "Impossible to sense ACC key" due to issues like poor connector fit or faulty wiring, with corrective actions including checking the connector, harness, ECU, and main controller.
How do I calibrate or relearn the hydrostatic transmission on a Yanmar C50R-5?
To calibrate the hydrostatic transmission (HST) pump on a Yanmar C50R-5, perform a neutral adjustment of the pump. This involves raising the wagon, installing pressure gauges, starting the engine, and adjusting the tie bolt (16) until the pressures on both sides of the turbo piston are equal, with a tightening torque of 20.7 to 37.6 ft·lbf (28 to 51 N·m). Additionally, the displacement limiter of the remote hydraulic control can be adjusted to control travel motor speed, with a setscrew tightening torque of 14.5 to 20.3 ft·lbf (20 to 27 N·m).
What do I get after purchasing this Yanmar C50R-5 manual?
Immediate download of the complete 589-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. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Are there wiring harness diagrams in this Yanmar C50R-5 manual?
Yes. You'll find full electrical schematics with wire routing diagrams, connector identification, and circuit descriptions.
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