Fixing your compact excavator starts with the right factory data. All 332 pages of this Yanmar SV08-1 Service Manual PDF (OEM #4460106) focus on getting your machine back to the dirt. Inside, you get complete hydraulic circuit schematics covering both fixed and variable track gauge types, plus detailed teardown steps for the trochoid pump and cylinders. Open to the extensive troubleshooting section to quickly diagnose sluggish control valves, and reference full wiring diagrams to trace stubborn electrical faults. Set the travel motor main assembly bolts to 27.5-30.4 Nm and confirm the 6.6L hydraulic tank is filled with ISO VG46 oil before testing the boom swing. Guessing at clearances only leads to broken parts. Grab this bookmarked download, pull it up on your phone in the shop, and get back to turning wrenches.
What's Inside This Yanmar SV08-1 Manual
| System | Pages | Key Topics |
|---|---|---|
| Chapter 1 General Cautions for Maintenance Work | 7-18 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment |
| Chapter 2 Technical Data | 19-30 | Specifications, Outline Drawing and Working Area, Weight List of Main Parts, Lifting Capacity List (B08-3, B08-3V) |
| Chapter 3 Service Standards | 31-48 | Machine Performance, Engine, Undercarriage (Rubber Crawler Specifications), Controls, Hydraulic Equipment (Hydraulic Cylinders) |
| Chapter 4 Engine | 49-93 | Measurement |
| Chapter 5 Hydraulic System | 94-126 | Outline (Control Valve Operation), Hydraulic Circuit Schematic (Variable Track Gauge Type Specifications, Fixed Track Gauge Type Specifications) |
| Chapter 6 Hydraulic Equipment | 127-216 | Hydraulic Pump, Control Valve, Swing Motor, Valve Block, Travel Motor |
| Chapter 7 Adjustment and Repair | 217-294 | Electrical Equipment, Undercarriage, Controls, Swing Bearing, Hydraulic Equipment, Work Implements |
| Chapter 8 Periodic Inspection and Servicing | 295-297 | Swing Gear Case, Travel Reduction Gear, Transmission, Differential Gear, Hydraulic Pump, Swing Gears, Swing Bearings, Track Gauge Change Cylinder |
| Chapter 9 Fuel, Lube Oil and Grease Recommended | 298-299 | Engine oil, Travel reduction gear, Hydraulic oil, Fuel, Engine cooling water, Idler, Track roller, Carrier roller |
| Chapter 10 Troubleshooting | 300-329 | Bucket, Arm, Upperstructure, Travel Motor, Hydraulic Oil Tank, Engine, Electrical Equipment, Control Valve |
| Chapter 11 Reference Data | 330-331 | bucket, bucket arm, bucket link, arm-stick, bucket pin, cylinder, hydraulic pump |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Travel motor main assembly bolts tightening torque | 27.5 to 30.4 Nm | p. 204 |
| Work Implements M10 bolt tightening torque | 44.1 to 58.8 Nm | p. 294 |
| Hydraulic hose (SAE J517, 100R1) 02 working pressure | 17.2 MPa | p. 14 |
| Hydraulic oil type | YANMAR SUPER HYDRO. OIL (ISO VG46) | p. 299 |
| Hydraulic oil tank capacity | 6.6 L | p. 299 |
| Engine oil type | Engine oil SAE 10W30, CD class | p. 299 |
| Engine oil pan capacity | 1.8 L | p. 299 |
| Engine cooling water type | YANMAR genuine long-life coolant (LLC) 30 % added | p. 299 |
| Radiator coolant capacity | 1.6 L | p. 299 |
| Battery type | 44B-19L | p. 26 |
| Battery voltage - 5 hrs rate capacity | 12-30 V-Ah | p. 26 |
| Air cleaner type | Cyclone type | p. 26 |
Yanmar SV08-1 Common Problems This Manual Covers
Yanmar SV08-1 boom and bucket moving slowly or completely unresponsive during normal operation
Inspect the hydraulic oil tank sight glass and fill with exactly 6.6 L of YANMAR SUPER HYDRO. OIL (ISO VG46) as detailed on page 299. Check all hoses for leaks and verify the system relief set pressure holds steady at 18.6 MPa.
Manual Section: Work Implement Operation IssuesEngine temperature running abnormally high or steam escaping from the radiator area p. 306
Test the radiator cap pressure to confirm it holds 88.3 ± 14.7 kPa. Inspect the cooling fins for debris blockages. Drain the system and refill the radiator with exactly 1.6 L of coolant mixture as shown on page 299. Check V-belt tension slack.
Manual Section: General Machine and Engine TroubleshootingHydraulic lines showing severe dry rot, cracking, or active fluid leaks near the pump p. 14
Replace damaged lines using SAE J517, 100R1 spec hoses rated for 17.2 MPa working pressure as specified on page 14. Clean all fittings thoroughly before installation. Cycle the cylinders fully to bleed trapped air from the hydraulic circuit before returning to service.
Manual Section: Chapter 1 General Cautions for Maintenance WorkBucket and blade linkage pins clunking or shifting excessively during heavy digging p. 294
Torque all loose work implement M10 bolts to 44.1 to 58.8 Nm as outlined on page 294. Inspect the linkage pins for uneven wear or galling. Apply fresh grease to all pivot points until clean grease pushes out of the joints.
Manual Section: Chapter 7 Adjustment and RepairTrack drive assembly shifting under load or making a metallic clunking sound while driving
Verify the travel motor main assembly bolts are secure. Torque the mounting hardware strictly to 27.5 to 30.4 Nm according to page 204. Inspect the drive sprockets for worn teeth and adjust the rubber track tension if excessive slack is present.
Manual Section: Travel Equipment TroubleshootingFrequently Asked Questions
How do I reset the hydraulic pressure on a YANMAR SV08-1 mini excavator?
To reset the hydraulic pressure, first ensure the engine is at rated speed and the hydraulic oil temperature is between 50 to 60°C. Install a pressure gauge with a capacity of 34.3 MPa. For system relief valves, retract the arm or bucket cylinder to its stroke end and hold the control lever. If the measured value is not the set pressure (18.6 MPa), loosen nut (M14) 7 and turn adjust screw 8 to set the pressure, then tighten the nut. For circuit relief valves, extend the arm cylinder or retract the boom cylinder to its stroke end, hold the control lever, and adjust if the pressure is lower than the system relief valve pressure, then tighten nut (M14) 7.
What are the replacement specifications for hydraulic hoses on the YANMAR SV08-1?
Yanmar Construction Machinery uses two types of hydraulic hoses: standard parts (Yanmar Industrial Standards) and special parts. Specifications include hose diameter, inner diameter, outer diameter, and working pressure. For example, a SAE J517, 100R1 type hose with a 02 hose dia has an inner diameter of 6.3 mm, an outer diameter of 13.5 mm, and a working pressure of 17.2 MPa. The manual also provides details on fitting combinations and total length units.
What are the recommended specifications for hydraulic oil in the YANMAR SV08-1?
The recommended hydraulic oil for the YANMAR SV08-1 is YANMAR SUPER HYDRO. OIL (ISO VG46). The hydraulic oil system has a tank capacity of 6.6 L, with an additional 4.4 L for other parts, totaling 11 L. The manual specifies that the oil level should be checked at the midpoint between the upper and lower limits of the oil level gauge when the machine is on firm, flat ground, with the bucket and arm cylinder rods retracted to maximum, and the bucket and blade lowered to the ground.
What is the engine oil capacity for the YANMAR SV08-1?
The engine oil pan capacity for the YANMAR SV08-1 is 1.8 L. The recommended engine oil types include SAE 10WCD, SAE 10W-30CD, and SAE 15W-40CD, with specific recommendations based on ambient temperature ranges from -20°C to 30°C.
How quickly can I access this Yanmar SV08-1 manual after buying?
A 332-page Service Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Can I print this Yanmar SV08-1 manual?
The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
Can I find wiring schematics in this Yanmar SV08-1 manual?
Yes, full electrical schematics are included with wire colors, connector locations, and circuit descriptions.
Document Quality
This document is a scanned PDF with an OCR text layer, allowing you to search and copy text throughout. The text quality is crisp and easy to read on all pages. Diagrams and illustrations are raster images; while generally clear, some labels may lose sharpness at high zoom. The pages are clean with no noticeable scan artifacts, stains, or skewed content. Please note that several pages are largely blank, serving as chapter title pages.
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