Hunting for the correct replacement numbers for your rubber crawler carrier? This 126-page Yanmar C50R-3B Parts Catalog PDF (OEM #0CS10-M56000EN) breaks down every single assembly from the undercarriage to the dump vessel. You get highly detailed exploded diagrams showing exactly how the travel motors, hydraulic pumps, and turning frames fit together on the factory floor. Open up the chassis or drivetrain sections to find complete component lists alongside clear illustrations, making your parts ordering completely foolproof. Verify that the lower truck roller requires a P1.5 thread pitch bolt, or confirm you are installing the correct 45A main fuse for the wire harness. Stop wasting money on incorrect parts from vague aftermarket websites. Download this bookmarked file right to your phone, locate your exact hardware instantly, and get your machine back in the dirt.
What's Inside This Yanmar C50R-3B Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Reference Materials | 2-6 | Parts Catalog History, Model Name, Ref. No., Lev. (Level), Interchangeability Mark, Effective Machine No. |
| Frame | 9-10 | Bush, Seal, Dust, Cover, Bumper, Oil Sump |
| Frame(Turning) | 11 | Washer, Bolt, Cover, Bumper, Shim, Plate |
| Crawler Belt | 12 | - |
| Carrier Roller | 13 | Assy, Shell, Shaft, Seal, Bearing, Snap Ring |
| Truck Roller | 14 | Assy, Shell, Shaft, Roller Bearing, Seal, Floating, O-Ring |
| Idler | 15 | Assy, Shell, Shaft, Seal, Floating, O-Ring |
| Truck Adgusta | 16 | Slide Fork Assy, Fork, Pin, Boss, Cylinder Assy |
| Travel Device | 17 | - |
| Turning Bearing | 18 | - |
| Swivel Joint | 19 | - |
| Turning Frame | 20 | - |
| Turning Device | 21 | - |
| Travel Lever | 22-23 | - |
| Travel Lever Piping | 24 | - |
| Dump & Turning Lever | 25 | - |
| Engine & Related Device(1) | 26 | Foot Fl, Engine, Bracket, Absorber, Cleaner Assy, Air Intake Pipe, Silencer |
| Engine & Related Device(2) | 27 | Hose, Power Band, Tank, Sub, Sensor, Cock Assy |
| Engine & Related Device(3) | 28 | Bracket, Shroud Assy, Plate Assy, Radiator Assy, Guard, Fan, Cooler |
| Control Box | 29-30 | Switch, Horn, Pilot Box, Timer, Meter, Hour, Wire Harness |
| Engine Control | 31 | Lever, Wire Bracket, Grip, Tube, Band |
| Electric Part | 32 | Wire Harness, Diode, Fuse, Horn, Clamp, Guard |
| Battery | 33 | Cable, Cover, Switch, Relay, Hose |
| Vessel Center Lamp | 34 | Bracket, Switch, Clamp, Wire Harness, Lamp, Relay |
| Head Light | 35 | - |
| Back Light | 36 | - |
| Turn Signal Lamp | 37 | - |
| Wind Washer | 38 | - |
| Back Buzzer | 39 | - |
| Grease Piping | 40 | - |
| Valve | 41-42 | - |
| Valve(Turning) | 43-44 | - |
| Hyd.Oil Piping(1) | 45 | - |
| Hyd.Oil Piping(2) | 46 | - |
| Hyd.Oil Piping(1)(Turning) | 47 | - |
| Hyd.Oil Piping(2)(Turning) | 48 | - |
| Turning Dump Piping | 49 | - |
| Pump Driving | 50 | - |
| Hyd. Oil Tank | 51 | - |
| Hyd. Oil Tank(Turning Spec) | 52 | - |
| Fuel Oil Tank | 53 | - |
| Cover(1) | 54-55 | - |
| Cover(2) | 56-57 | - |
| Cover(3)(Side Cover:Left) | 58 | - |
| Balustrade | 59 | - |
| Back Mirror | 60 | - |
| Floor | 61 | - |
| Seat | 62 | - |
| Seat(Component Part) | 63 | - |
| Cabin(1) | 64 | - |
| Cabin(2) | 65 | - |
| Cabin(3) | 66-67 | - |
| Cabin(4) | 68 | - |
| Cabin(5) | 69 | - |
| Canopy | 70 | - |
| Heater(1) | 71-72 | - |
| Heater(2) | 73 | - |
| Defroster | 74 | - |
| Cooler(1) | 75 | - |
| Cooler(2)(Compressor) | 76 | - |
| Cooler(3)(Condenser)) | 77 | - |
| Cooler(41)(Cooler Unit) | 78 | - |
| Cooler(5)(Cooler Unit) | 79 | - |
| Cooler Bracket | 80 | - |
| Vessell | 81 | - |
| Vessell(Turning) | 82 | - |
| Dump Body | 83 | - |
| Rear Link | 84 | - |
| Open and Close Lever | 85 | - |
| Label | 86 | - |
| Label | 87 | - |
| Tool | 88 | - |
| Painted Color | 89 | - |
| Painted Color(Turning) | 90 | - |
| Control Valve(4-Range) | 91 | - |
| Control Valve(2-Range) | 92 | - |
| Block(1) | 93 | - |
| Block(2) | 94 | - |
| Block(3) | 95 | - |
| Block(4) | 96 | - |
| Remote Control Valve | 97 | - |
| Auto Tension Valve | 98 | - |
| Solenoid Valve(1-Range) | 99 | - |
| Solenoid Valve(2-Range) | 100 | - |
| Depression Valve | 101 | - |
| Swivel Selector | 102 | - |
| Swivel Joint | 103 | - |
| Dump Cylinder | 104 | - |
| Dump Cylinder(Turning) | 105 | Cylinder, Dump, Seal Set, Seal, Dust, Tube Assy, Piston |
| Truck Shoe Cylinder | 106 | Cylinder Assy, Seal Set, Tube, Rod, Piston, Bush |
| Travel Motor | 107-108 | Traver Motor, Seal Set, Cylinder Block Kit, Gear, Reduction, Bearing |
| Turning Motor | 109-110 | Assy, Seal Set, Housing Assy, Gear, Bearing, Piston |
| Hyd. Oil Pump | 111-112 | HST Pump, Seal |
| Gear Pump | 113 | - |
| Radio | 114 | - |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Fuse Rating | 45A | p. 32 |
| Handrail Length | 440mm | p. 59 |
| U-Bolt Assembly Size | 32A | p. 83 |
| Bolt Thread Pitch | P1.5 | p. 14 |
| Pin Spring Dimension | 8X 36 | p. 22 |
Yanmar C50R-3B Common Problems This Manual Covers
Need replacement 450x110x74 rubber tracks for Yanmar C50R-3B after severe wear in abrasive ground conditions p. 12
Check the Crawler Belt diagram on page 12 to identify the exact replacement part number. Locate the assembly for the standard 450x110x74 rubber tracks. Verify the track link count matches your machine setup, and cross-reference the part number with your serial range before ordering.
Manual Section: Crawler BeltMain electrical system dead and need to identify the correct replacement main harness fuses p. 32
Inspect the Electric Part exploded view on page 32 to find the main wiring harness layout. Identify the correct part numbers for the 45A and 75A main fuses. Match the fuse block diagram to your machine to order the exact OEM replacement components.
Manual Section: Electric PartLoose or missing truck roller mounting hardware accompanied by severe undercarriage vibration and noise p. 14
Review the Truck Roller components list on page 14. Find the specific part numbers for the mounting bolts and verify the P1.5 bolt thread pitch. Order the matching washers, seals, and floating O-rings shown in the diagram to complete the roller assembly replacement.
Manual Section: Truck RollerBroken dump body hardware making the rear link assembly rattle heavily during material transport p. 83
Examine the Dump Body parts diagram on page 83. Locate the correct part number for the 32A U-Bolt Assembly Size. Check the adjacent exploded view to find replacement nuts, brackets, and related mounting hardware needed to secure the dump body properly.
Manual Section: Dump BodyFrequently Asked Questions
How do you fix need replacement 450x110x74 rubber tracks after severe wear in abrasive ground conditions?
Check the Crawler Belt diagram on page 12 to identify the exact replacement part number. Locate the assembly for the standard 450x110x74 rubber tracks. Verify the track link count matches your machine setup, and cross-reference the part number with your serial range before ordering.
How do you fix main electrical system dead and need to identify the correct replacement main harness fuses?
Inspect the Electric Part exploded view on page 32 to find the main wiring harness layout. Identify the correct part numbers for the 45A and 75A main fuses. Match the fuse block diagram to your machine to order the exact OEM replacement components.
How do you fix worn truck roller mounting bolts and seals to stop undercarriage oil leaks?
Review the Truck Roller components list on page 14. Find the specific part numbers for the mounting bolts and verify the P1.5 bolt thread pitch. Order the matching washers, seals, and floating O-rings shown in the diagram to complete the roller assembly.
How do you identify the correct swivel joint seal kit parts for a hydraulic leak at the center joint?
Refer to the Swivel Joint section on page 19 for the complete component breakdown. The catalog lists the joint seal set, O-rings, and housing parts with individual part numbers. Use the exploded diagram to confirm the seal orientation before disassembly, then cross-reference part numbers against your machine serial range.
How do you source the correct travel motor seal set and reduction gear parts for a C50R-3B that has lost drive power?
Turn to pages 107-108 for the Travel Motor exploded diagram. The catalog itemizes the seal set, cylinder block kit, reduction gear assembly, and bearing components with OEM part numbers. Locate your specific failure component in the illustration and verify the part number against your machine serial number range before ordering.
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