Looking for factory teardown procedures for your wheel loader? This 300-page Yanmar V3-5, V4-5 Service Manual PDF (OEM #52700020) gives you every spec needed to rebuild the V4-5HL (US) and standard variants. Open the technical data section and you get complete hydraulic circuit diagrams, full machine wiring schematics, and detailed engine troubleshooting tables. Inside, you will find step-by-step repair procedures covering everything from the H.S.T. pump and steering orbit roll to the direct injection fuel system. Verify the cylinder bore standard clearance sits exactly between 3.3070 and 3.3083 inches, then torque the Class 1 cylinder head bolts to 62.92 ft-lbf before startup. Keep your machine out of the expensive dealer bay. Grab this bookmarked digital file, open it directly on your shop tablet, and get the repair done right the first time.
What's Inside This Yanmar V3-5, V4-5, V4-5HL (US) Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | 6-16 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment |
| Technical Data | 17-32 | Specifications, External Drawings and Working Area (Canopy Type, Cabin Type), Hydraulic Circuit Diagram, Wiring Diagram, Mass List of Main Parts |
| Service Standards | 33-49 | Machine Performance, Engine Specifications, Controls, Undercarriage, Hydraulic Equipment, Implements (Front Implements) |
| Engine | 50-126 | Outline (Structural Drawing, Cooling Water, Lubricating Oil and Fuel, Fuel Injection System) |
| Structure and Operation | 127-144 | 5-1 Outline, 5-2 Component Parts, 5-3 Power Transmission Device, 5-4 Steering System, 5-5 Electrical Equipment |
| Hydraulic Equipment | 145-223 | 6-1 Hydraulic Pump (H.S.T.), 6-2 Hydraulic Motor (H.S.T.), 6-3 Troubleshooting for Hydraulic Pump and Motor (H.S.T.), 6-4 Control Valve, 6-5 Orbit Roll, 6-6 Hydraulic Cylinders |
| Adjustment and Repair | 224-283 | 7-1 Machine, 7-2 Hydraulic Pump (H.S.T.), 7-3 Front and Rear Axles, 7-4 Controls, 7-5 Adjustment of Pressure, 7-6 Loader Towing at Hydraulic Power Source Failure, 7-7 Cabin |
| Periodic Inspection and Servicing | 284-286 | 8-1 List of Periodic Inspection and Servicing |
| Fuel, Lube Oil and Grease Recommended | 287-288 | Fuel, Lube Oil, Grease, Transfer Oil, Hydraulic Oil, Cooling Water |
| Troubleshooting | 289-299 | Quick Reference Table for Troubleshooting, Troubleshooting Through Measurement of Compression Pressure |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydraulic hose (Union nut (PF) 1/8) tightening torque | 7.23 to 10.84 ft·lbf (9.8 to 14.7 N·m) | p. 47 |
| Cylinder head bolt (Class 1) tightening torque | 62.92 to 67.07 ft·lbf (85.3 to 91.2 N·m) | p. 48 |
| Cylinder bore dia. (L mark) Standard clearance | 3.3070 to 3.3083 in. (84.000 to 84.030 mm) | p. 36 |
| Operating mass | 7540 lbs (3420 kg) | p. 18 |
| Hydraulic hose 1/2 (Union nut (PF)) torque | 43.37 to 46.99 ft-lbf (58.8 to 63.7 N·m) | p. 48 |
Yanmar V3-5, V4-5, V4-5HL (US) Common Problems This Manual Covers
Yanmar V3-5, V4-5, and V4-5HL engine cranks slowly or refuses to start completely during cold weather operation. p. 289
Verify the battery voltage is at least 12 V as specified on page 21. Drain the engine oil pan and refill to the 5.81 L (5.5 US Gal) capacity detailed on page 288 using winter-grade oil. Replace the fuel filter element if past the 200 hrs interval.
Manual Section: Chapter 10 TroubleshootingLoader boom drops slowly under load with visible fluid dripping from the main control valve lines. p. 33
Inspect the primary hydraulic lines for leaks and check the 1/2 (Union nut (PF)) connections. Torque any loose hydraulic hose fittings to 43.37 to 46.99 ft-lbf (58.8 to 63.7 N·m) as shown on page 48. Wipe the area clean and cycle the loader to verify the repair.
Manual Section: Chapter 3 Service StandardsExcessive blowby and blue exhaust smoke under heavy acceleration indicating worn piston rings. p. 33
Measure the cylinder bore diameter to ensure it falls within the standard clearance of 3.3070 to 3.3083 in. (84.000 to 84.030 mm) listed on page 36. Inspect the intake valves and verify the seat angle is machined to exactly 120 degrees as shown on page 37.
Manual Section: Chapter 3 Service StandardsSteering wheel feels jerky and binds up when turning the machine at low engine speeds. p. 145
Check the hydraulic fluid level first. Inspect the orbit roll system and tighten all Hexagon head bolts (7T) and nuts (Coarse M8x1.25) to 16.67 to 20.95 ft·lbf (22.6 to 28.4 N·m) per page 49. Test steering response lock-to-lock to ensure smooth operation.
Manual Section: Chapter 6 Hydraulic EquipmentFrequently Asked Questions
What are the torque specifications for the disc bolts (wheel nuts) on a YANMAR V3-5/V4-5 wheel loader?
The tightening torque for the disc bolts (wheel nuts) on a YANMAR V3-5/V4-5 wheel loader is 253.0 ft·lbf (343 N·m). This specification is crucial for ensuring proper wheel assembly and safety during tire replacement. Always follow these instructions carefully.
What is the recommended engine oil capacity for the YANMAR V3-5 wheel loader?
The recommended engine oil capacity for the YANMAR V3-5 wheel loader's engine oil pan is 5.81 Qts (5.5 L). This information is found in the fuel, lube oil, and grease recommendations section of the manual.
What are the standard valve clearances for the intake and exhaust valves on the YANMAR engine?
The standard valve clearance for both intake and exhaust valves is 0.006 to 0.010 in. (0.15 to 0.25 mm). This measurement is taken when the engine is cold and is critical for proper engine operation.
What is the standard compression pressure for the YANMAR V3-5 engine at 250 RPM?
The standard compression pressure for the YANMAR V3-5 engine at 250 RPM is 449.5 to 478.5 PSI (3.1 to 3.3 MPa). This measurement is taken during a compression test to assess engine health.
What format is this manual in?
This is a 300-page searchable PDF ready for immediate download. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
Can I print specific sections of 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.
Can I find wiring schematics in this Yanmar V3-5, V4-5, V4-5HL (US) manual?
Yes, full electrical schematics are included with wire colors, connector locations, and circuit descriptions.
Document Quality
This document is a scanned PDF, not a native digital file. It includes an OCR layer, so you can search and copy text throughout the manual. Text quality is generally readable, though some smaller fonts exhibit slight blurriness and occasional fading typical of a scanned document. Diagrams and illustrations are raster images, meaning they may pixelate when magnified, but their labels are mostly clear. Pages are generally clean with minor scan artifacts and some slight skewing, and there are several blank filler pages present.
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