Tracking down the exact OEM replacement components for your crawler back-hoe is simple with this 121-page Yanmar SV08-1A Parts Catalog PDF (OEM #0CS10-M52103EN). Open the file to find highly detailed exploded views covering the complete turning motor, travel frame, and variable leg cylinder assemblies. You get complete electrical wiring diagrams, full hydraulic schematics for the main control valve, and factory part numbers for all regional variants including the US, AS, KR, NZ, and SA models. Verify the correct undercarriage components before ordering, noting the exact 53.5mm track roller diameter for Y-spec machines versus the 62mm S-spec roller. Stop ordering the wrong parts and waiting on returns. Grab this bookmarked download, match up your assemblies on screen, and get your excavator back in the dirt.
What's Inside This Yanmar SV08-1A Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Reference Materials | 2-7 | - |
| Label(Variable Leg : Link Type)(To Maf000) | 11-12 | Support Label, Label, Swing Lock Us Label, Caution Tag Assy, Lock Label, Hydraulic Oil Label, Turning Lock Label, Slope Label |
| 82.(1A)Label(Variable Leg : Link Type)(From Maf001) | 13-14 | Support Label, Label, Swing Lock Us Label, Caution Tag Assy, Lock Label, Hydraulic Oil Label, Turning Lock Label, Slope Label |
| 77.(1B)Label(Variable Leg : Slide Type)(To Maf000) | 15 | Support Label, W/ S Operation Label, Greasing Lavel, Swing Lock Us Label, Caution Tag Assy, Lock Label, Hydraulic Oil Label, Turning Lock Label |
| 83.(1C)Label(Variable Leg : Slide Type)(From Maf001) | 16-17 | Support Label, W/ S Operation Label, Greasing Lavel, Swing Lock Us Label, Caution Tag Assy, Lock Label, Hydraulic Oil Label, Turning Lock Label |
| Label(Kr)(To Maf000) | 18-19 | Support Label, Label, W/ S Operation Label, Swing Lock Us Label, Caution Tag Assy, Lock Label, Hydraulic Oil Label, Turning Lock Label |
| 84.(2A)Label(Kr)(From Maf001) | 20 | - |
| Label(Safety) | 21 | Caution Tag Assy, Slope Label, Reservoir Us Label, Transport Label, Battery Label, Neutral Label, Swing Area Label, Radiator Label |
| Muffler & Air Cleaner | 23 | Gasket, Air Cleaner Hose-B, Air Cleaner B N Hose, Air Cleaner Element, Element R, Cover Assy, Unload Valve, Air Cleaner Label |
| Accelerator | 24 | Accelerator Lever, Arm Assy, Accelerator Grip, Collar, Spring |
| Engine Mount(Us, As : to M18847, Kr : to M14655) | 25 | Cushion Rubber, Absorber 290K Rubber, Washer, Bolt |
| 68.(7A)Engine Mount(Us, As : From M18848, Kr : From M14656) | 26 | Absorber 290K Rubber, Washer, Bolt, Nut |
| Radiator & Mount | 27 | Cushion, Pressure Cap, Shroud Assy, Rubber Hose, Clip, Seal, Radiator Seal, Radiator Hose a |
| Fuel Tank | 28 | Fuel Strainer, Strainer Gasket, Fuel Tank Cap Assy, Vent Valve, Hose, Float, Rubber Plate, Drain Block |
| Fuel Piping | 29 | Fuel Pipe, Fuel Hose, Fuel Filter, Band, Band K |
| Battery | 30 | Battery Cord, Battery S Cord Assy, Rod |
| Wiring | 31 | Hose N Clip, Cover, -2P Diode, Housing, Fuse 40A, B 10A Fuse, Housing W, Stand Harness |
| Equipment | 32-33 | Fuse Bracket, Starter Switch Assy, Starter N Switch Assy, Lamp, 12V .4W Bulb, Buzzer, Work Lamp, Lamp Stay |
| Sprocket & Track Roller(Y Spec.) | 34 | Sprocket, Track Z Roller, Roller Shaft, TW254716 Seal, Ring |
| 75.(14A)Track Roller(S Spec.) | 35 | Oil 25X52X18 Seal, Ring, Ball, Bolt |
| Idler, Crawler Adjust & Crawler | 36 | Idler, Shaft Idler, Oil QLN306213 Seal, Ring, Rubber Crawler |
| Link Stand | 37-38 | Grommet, Support Assy, Support Assy N, Bush, 14X15 N Bush, Seal, Swivel Seal, Assist Bar |
| Stopper | 39 | Lever Knob, Lock Lever, Lock Link, Lock Pipe, Spring |
| Operation Lever(Right) | 40 | Lever Boot P, Knob Assy, Lever, Nc- Joint, Rod, Elbow, Joint |
| Operation Lever(Right)(Kr) | 41 | Lever Boot P, Knob Assy, Lever, Nc- Joint, Base Assy, Arm, Spring, Rod |
| Operation Lever(Left) | 42 | Lever Boot P, Knob Assy, Lever, L Link Assy, Nc- Joint, Rod, Elbow, Joint |
| Operation Lever(Left)(Kr) | 43 | Lever Boot P, Knob Assy, Lever, L Link Assy, Nc- Joint, Rod, Elbow |
| Travel Lever & Blade Lever | 44 | Track Lever, Bush, Blade Link, Blade Lever, Drive Grip, Blade Grip, Grease PT1 Nipple, Spool Rod a |
| Travel Lever & Blade Lever(Kr) | 45 | Track Lever, Bush, Blade Link, Blade Lever, Drive Grip, Blade Grip, Grease PT1 Nipple, Spool Rod a |
| Link | 46 | 14X10 Bush, Ring, Grease MT6X1 Nipple, W Band |
| Swing Pedal | 47 | Swing Shaft Assy, Spring, Spool Rod |
| P.T.O. Pedal | 48 | PTO Shaft Assy, PTO Pedal, Spring, Spool Rod, PTO Lock Assy |
| Variable Leg Lever | 49 | Variable Lever, Bush, 14X15 N Bush, Lever Knob, Grease C Nipple, Link |
| Travel Frame(Variable Leg : Link Type) | 50 | Tree Clip, Center Frame Assy, Crawler Frame, Bracket Assy, Link, Lock Plate, Grease PT1 Nipple, Grease B Nipple |
| Travel Frame(Variable Leg : Slide Type)(Kr) | 51 | Lower Center Frame, Crawler Frame, Stopper Bolt Assy, Stopper Nut Assy, Plate, Motor Cover |
| 78.(29A)Travel Frame(Variable Leg : Slide Type)(As, Nz) | 52 | Crawler Frame, Stopper Bolt Assy, Stopper Nut Assy, Plate, Tree Clip, Motor Cover |
| Turning Frame & Turning Bearing | 53 | Turning Frame Assy, 35X45 Bush, Frame Cover, Turning Bearing, Seal Set, PTO Cover, PTO Assy S Cover L, Radiator Seal |
| Step & Turning Lock | 54 | 5X18X35 Knob, Step Seal, Insulator, Pin |
| Seat & Seat Mount | 55 | Seat Bracket, Seat Cushion, Bolt, Pin |
| ROPS & Seat Belt | 56 | Spring, Seat Belt Assy, Seat Belt Assy R, Seat Belt Assy N, ROPS Base Assy, ROPS S Base Assy, ROPS Roof Assy, ROPS S Roof Assy |
| Bonnet | 57-58 | Rubber, Bonnet Assy, Trim, Bonnet B Pad, Insulator, Insulator N, Lever Knob, Bonnet Arm Assy |
| Hydraulic Pump & Joint | 59 | Pump, Pump R, Seal Set, Bolt |
| Boom Cylinder | 60 | Boom Cylinder Assy, Head -, 25X25 Bush, Boom Tube, Boom S Tube, Boom Rod Assy, RGU50 Gasket Assy, - Collar |
| Arm Cylinder | 61 | RGU50 Gasket Assy, Arm Tube, Arm Rod Assy, Piston 18X28, Head B W/ Bush, 25X25 Bush, Head 50B Seal Set |
| Bucket Cylinder | 62 | Cylinder Assy, Bucket Tube, Head, 25X25 Bush, Bucket Rod Assy, Piston, Gasket, Head Seal Set |
| Swing Cylinder | 63 | Swing Cylinder Assy, RGU55 Gasket Assy, Head Cmp, 30X30 Bush, Piston, Swing Tube Assy, Swing S Tube Assy, Bush |
| Blade Cylinder | 64 | Blade Cylinder Assy, RGU50 Gasket Assy, Piston 18X28, Head B W/ Bush, 25X25 Bush, Blade Tube, Head 50B Seal Set, Blade Rod Assy |
| Variable Leg Cylinder(Link Type) | 65 | Cover Assy, Variable Cylinder, RGU50 Gasket Assy, Piston 18X28, Head B W/ Bush, 25X25 Bush, Head 50B Seal Set, Variable Tube |
| Variable Leg Cylinder(Slide Type) | 66 | Cylinder Assy, Head 50B Seal Set, RGU50 Gasket Assy, Variable Tube Assy, Piston 18X28, Head B W/ Bush, 25X25 Bush |
| Travel Motor | 67-68 | Travel Motor Cmp, Base Plate Assy, Body Assy N, Ring, Spring, Needle, Snap Ring, Cover |
| Turning Motor(N Spec.)(To M19874) | 69 | O-Ring, Bolt |
| 76.(44A)Turning Motor(E Spec.)(From M19875) | 70 | Spring, Plate, Valve Plate, 2K Drive, Jiroller, Retaining Ring, Shaft Face Seal, Inner Face Seal |
| Swivel Joint(Y Spec.)(Variable Leg : Link Type)(To M17687) | 71 | Swivel Assy Z, Swivel Hub, Swivel Shaft, Swivel Flange, Swivel Spacer, Ring, Swivel Seal Set, Seal |
| 70.(45A)Swivel Joint(N Spec.)(Variable Leg : Link Type)(From M17688) | 72 | Duct Cover, Ring, O-Ring, Washer |
| Swivel Joint(Y Spec.)(Variable Leg : Slide Type)(To M17682) | 73 | Swivel Assy Z, Swivel Seal Set, Seal, Buck Up Ring, Swivel Hub, Swivel Shaft, Swivel Flange, Swivel Spacer |
| 69.(46A)Swivel Joint(N Spec.)(Variable Leg : Slide Type)(From M17683) | 74 | Ring, Duct Cover, O-Ring, Washer |
| Control Valve(1/3)(Variable Leg : Link Type) | 75-76 | Section Assy, Option Section Assy, Bac Up Ring, Valve Stay, Spring Cap, Optional Spool Assy, Swing Section Assy, Valve Spring |
| Control Valve(2/3)(Variable Leg : Link Type) | 77-78 | Bucket Section Assy, Bac Up Ring, Valve Spring, Valve Stay, Spring Cap, Check Valve, Bucket Spool Assy, Travel Section Assy |
| Control Valve(3/3)(Variable Leg : Link Type) | 79 | Arm Section Assy, Bac Up Ring, Valve Spring, Valve Stay, Spring Cap, Arm Spool Assy, Check Valve, Section Assy |
| 71.(49A)Control Valve(1/3)(Variable Leg : Slide Type)(Kr) | 80-81 | Section Assy, Bac Up Ring, Valve Stay, Spring Cap, Valve Spring, Check Valve, Swing Section Assy, Swing Spool Assy |
| 72.(49B)Control Valve(2/3)(Variable Leg : Slide Type)(Kr) | 82-83 | Bucket Section Assy, Bac Up Ring, Valve Spring, Valve Stay, Spring Cap, Check Valve, Bucket Spool Assy, Travel Section Assy |
| 73.(49C)Control Valve(3/3)(Variable Leg : Slide Type)(Kr) | 84 | Arm Section Assy, Bac Up Ring, Valve Spring, Valve Stay, Spring Cap, Arm Spool Assy, Check Valve, Section Assy |
| 79.(49D)Control Valve(1/3)(Variable Leg : Slide Type)(As, Nz) | 85-86 | Section Assy, Swing Section Assy, Bac Up Ring, Valve Spring, Valve Stay, Spring Cap, Swing Spool Assy, Check Valve |
| 80.(49E)Control Valve(2/3)(Variable Leg : Slide Type)(As, Nz) | 87-88 | Bucket Section Assy, Bac Up Ring, Valve Spring, Valve Stay, Spring Cap, Check Valve, Bucket Spool Assy, Travel Section Assy |
| 81.(49F)Control Valve(3/3)(Variable Leg : Slide Type)(As, Nz) | 89 | Travel Section Assy, Bac Up Ring, Valve Stay, Spring Cap, Travel Spool Assy, Arm Section Assy, Valve Spring, Arm Spool Assy |
| Check Valve(Variable Leg : Link Type) | 90 | Check Valve Assy, Piston, O-Ring, Bolt |
| Hyd. Oil Tank | 91 | Return Strainer, Filter Element, Suction Filter, Reserver Cap, Gauge Assy, Reservoir Us Label |
| Tank - Pump - Control Valve | 92 | PF3 Connector, Joint Assy, Adapter, Hose |
| Control Valve - Turning Motor & Swing Cylinder | 93 | Elbow, Adapter, PF1/2X1 Connector, Rgi- Joint, Band, Hose, Hose Cover |
| Control Valve - Swivel Joint(Variable Leg : Link Type) | 94 | Elbow, Adapter, Rgi- Joint, Band |
| Control Valve - Swivel Joint(Variable Leg : Slide Type) | 95 | Elbow, Adapter, Rgi- Joint, Band |
| Return | 96 | Check Valve Assy, 90RGI- Joint, Elbow S, Elbow Nipple, - Nipple, 8X1 Connector, Hose Cover, Hose |
| P.T.O.(Frame End) | 97 | Joint, PF1/4PF3 Connector, PTO Bracket, Elbow, Hose, Connector Assy, - Nipple |
| Travel Frame(Variable Leg : Link Type) | 98 | Connector, G1/ -G1 Joint, Joint, 3X1 Connector, PT1 Joint, Rgi- Joint, Hose |
| Travel Frame(Variable Leg : Slide Type) | 99 | Connector, G1/ -G1 Joint, 3X1 Connector, Rgi- Joint, Joint |
| Boom | 100 | Elbow, Adapter, Rgi- Joint, Hose, Rubber Plate, Hose B Support, 9X18 Collar, Hose Cover |
| P.T.O.(Boom End) | 101 | Joint, Adapter, Elbow, 90RGI- Joint, Swivel Joint Elbow, Boom Pipe Retainer, Boom Pipe S Retainer, PTO Tube |
| Greasing | 102 | Hose, Grease Joint, PT1 Connector, Grease PT1 Nipple |
| Boom & Boom Bracket | 103 | Boom Assy, Grease C Nipple, Boom Bracket, Boom S Bracket, Ring |
| Arm | 104 | Arm Assy, S Arm Assy, Boom Label, Grease C Nipple |
| Bucket Arm & Link | 105 | Bucket Link, Bucket Arm, Bucket S Arm, Grease PT1 Nipple |
| Bucket | 106 | Bucket Assy, Side Cutter, Teeth Assy, Grease PT1 Nipple |
| Blade | 107 | Blade Assy, Grease PT1 Nipple, Grease B Nipple, Assy W Brade |
| Label Kit(For Canada)(Optional) | 108 | Servicing Tag Assy, Radiator Cap Label, Grease Label, Oil Label, Fuse Ca Label, Lift Ca Label, Swing Lock Ca Label, Greasing Label |
| Support Kit(Link Stand)(Optional)(Repair Parts) | 109 | Support Kit, Bush, Seal, 14X15 Bush |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Track roller diameter (Y specification) | 53.5mm | p. 34 |
| Track roller diameter (S specification) | 62mm | p. 34 |
Yanmar SV08-1A Common Problems This Manual Covers
Yanmar SV08-1A undercarriage clunking noise when tramming, track rollers visibly worn and leaking grease. p. 34
Inspect the Drivetrain Parts Diagram on page 34 to find the correct Y specification track roller assembly. Measure your existing rollers to confirm the 53.5mm diameter before ordering. Cross-reference the shaft, seal, and bearing part numbers to rebuild or replace the entire unit.
Manual Section: Sprocket & Track Roller(Y Spec.)Lower rollers seized up after working in deep mud, tracks repeatedly jumping off the front idler. p. 35
Check the exploded view on page 35 to identify the S specification track roller components. Verify your machine uses the larger 62mm diameter rollers. Match the specific oil seal, ball bearing, and shaft part numbers to your serial number range before contacting your parts supplier.
Manual Section: 75.(14A)Track Roller(S Spec.)Hydraulic fluid pooling under the center turning joint, hoses chafed and weeping fluid. p. 94
Locate the control valve to swivel joint piping diagram on page 94. Identify the correct hose assemblies and the RGI-1/4 threaded joint adapters. Order the exact replacement O-rings and elbows listed in the catalog to ensure a leak-free repair on the variable leg link type frame.
Manual Section: Control Valve - Swivel Joint(Variable Leg : Link Type)Frequently Asked Questions
What are the replacement specifications for track tension components?
For track rollers, the Y specification has a diameter (D) of 53.5mm, and the S specification has a diameter (D) of 62mm. Specific components for the idler and crawler adjust include the SHAFT IDLER (GRAY:49) with part number 172449-37110-1, and the SEAL, OIL QLN306213.2 with part number 1A1060-48300.
What are the replacement specifications for rubber hoses?
The manual provides specific part numbers for various rubber hoses. For example, the HOSE A, AIR CREANER is part number 172A20-11510, and the HOSE, RUBBER is part number 172446-13480. The HOSE,FO 80 is identified by part number 172A29-14600, and the HOSE, FUEL by part number 172734-14620.
How do you fix yanmar SV08-1A undercarriage clunking noise when tramming, track rollers visibly worn and leaking grease?
Inspect the Drivetrain Parts Diagram on page 34 to find the correct Y specification track roller assembly. Measure your existing rollers to confirm the 53.5mm diameter before ordering. Cross-reference the shaft, seal, and bearing part numbers to rebuild or replace the entire unit.
How do you fix lower rollers seized up after working in deep mud, tracks repeatedly jumping off the front idler?
Check the exploded view on page 35 to identify the S specification track roller components. Verify your machine uses the larger 62mm diameter rollers. Match the specific oil seal, ball bearing, and shaft part numbers to your serial number range before contacting your parts supplier.
Is this Yanmar SV08-1A Parts Catalog a digital download?
Instant PDF download. You get the full 121-page searchable Parts Catalog immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Are there any print restrictions on this manual?
This PDF is completely DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
Are hydraulic system diagrams in this Yanmar SV08-1A Parts Catalog?
Yes, this Yanmar SV08-1A Parts Catalog includes a hydraulic system diagram.
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