This 232-page Yanmar B55W-1 operation manual PDF (OEM #022-00035E) covers your Hydraulic Wheel Excavator from initial break-in through every scheduled service interval. Open it and you get maintenance intervals running from the 10-hour daily check all the way to the 12,000-hour six-year service, a full lubrication chart with fluid capacity tables, and troubleshooting coverage across the engine, hydraulic system, swing, electrical, travel, steering, and brakes. Cab controls get equally thorough treatment: the steering console, instrument panel, fuse box locations, and a rated lift capacity table for digging-mode operations. Torque the pump mounting bolts to 12 kgf.m (86.8 ibf.ft), and swap the hydraulic oil return filter at 250 hours the first time, then every 500 hours. No more hunting for specs that may or may not match your machine. Bookmarked by section so you can jump straight to what you need; download it now and bring it to the shop floor.
What's Inside This Yanmar B55W-1 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 7-50 | To the Operator of a Yanmar Excavator, Location of Safety Labels, Summary of Safety Precautions for Lifting in Digging Mode, Unauthorized Modifications, Before Starting Engine |
| Operating Controls | 51-96 | Component Locations, Operator's Area, Operational Controls and Panels, Steering Console, Instrument Panel, Heating and Air-Conditioning System, Stereo |
| Operation | 97-142 | To Handle a New Excavator, Starting and Stopping the Engine, Safety Lever, Travel, Operating Instructions, Operating Precautions, Parking Excavator, Towing Procedure |
| Inspection, Maintenance and Adjustment | 143-210 | Preliminary Work Machine Setup for Maintenance, Table of Recommended Lubricants, Fluid Capacities, Lubrication and Service Chart, Maintenance Intervals, 10 Hour / Daily Service |
| Transportation | 211-214 | Short Distance Self-Powered Travel, Trailer Loading/Unloading Procedures |
| Troubleshooting | 215-220 | Engine, Hydraulic System, Swing System, Electrical System, Travel System, Steering, Brakes |
| Specification | 221-226 | Standard Specification, General Dimensions, Working Range, Approximate Weight of Workload Materials |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine Vibration dampening mount bolts (Front) | 7.7 kgf.m / 55.7 ibf.ft | p. 207 |
| Radiator mounting bolt | 11 kgf.m / 80 ibf.ft | p. 207 |
| Hydraulic oil return filter replacement interval | first 250 hours, then every 500 hours | p. 170 |
| Pilot filter replacement interval | first 250 hours, then every 500 hours | p. 170 |
| Fuel filter replacement interval | every 500 hours / 3 months of service | p. 168 |
| Fuel filter installation torque | Screw filter on head until gasket contacts head, turn filter 1/2 turn more | p. 173 |
| Outer air cleaner element replacement interval | every 500 hours / 3 months of service | p. 170 |
| Inner air cleaner element replacement | whenever a new outer element is installed | p. 175 |
| Hydraulic oil tank level capacity | 72 liters (19.02 U.S. gal.) | p. 148 |
| Hydraulic oil system capacity | 125 liters (33.02 U.S. gal.) | p. 148 |
| Battery charging state (sufficiently charged) | GREEN | p. 195 |
| Battery charging state (insufficiently charged) | BLACK | p. 195 |
Yanmar B55W-1 Common Problems This Manual Covers
Yanmar B55W-1 hydraulic pump whines at high RPM, bucket and boom lift weak under load p. 215
Check hydraulic oil level against the sight gauge; the tank holds 72 liters (19.02 U.S. gal.). If level is correct, inspect the suction line for air ingestion and verify the return filter is current: first change at 250 hours, then every 500 hours (page 174). Follow the hydraulic troubleshooting chart at page 215 for pump failure and low-pressure diagnostics.
Manual Section: Hydraulic System TroubleshootingEngine cranks slowly or refuses to start, electrical gauges flicker during operation p. 195
Check the battery indicator window on page 195: GREEN means charged, BLACK means charge now, TRANSPARENT means replace. Always replace batteries in pairs. Clean and tighten all terminal connections firmly (page 194). Inspect wiring connectors for corrosion, especially after wet operation, and tighten all electrical connections per page 35. Follow electrical troubleshooting at page 215.
Manual Section: Electrical System TroubleshootingWheels travel sluggish or one side noticeably weaker, machine pulls hard to one side p. 215
Verify hydraulic fluid level; the full system holds 125 liters (33.02 U.S. gal.). Check tire pressure at 5.25 kg/cm2 per the specification on page 202. Inspect travel motor mounting bolts and torque to 9.5-10.5 kgf.m (69-76 ibf.ft) per page 207. For contaminated fluid or motor failure, work through travel system troubleshooting at page 215.
Manual Section: Travel System TroubleshootingSwing motion jerky or upper structure rotates slowly and stops under load p. 215
Inspect swing motor mounting bolts and torque to 10.9 kgf.m (79 ibf.ft); also check swing reduction gearbox bolts at 27 kgf.m (195 ibf.ft), both listed on page 207. Verify swing gear lubrication is current. For brake drag, motor seizure, or gear failure, work through swing system troubleshooting beginning at page 215.
Manual Section: Swing System TroubleshootingAll hydraulic functions progressively slower, noisier, and weaker across a full shift p. 174
Replace hydraulic return filter and pilot filter on schedule: first at 250 hours, then every 500 hours (pages 174, 175). Drain and refill with fresh oil; non-Yanmar brands require a 1000-hour change interval (page 146), while Yanmar Genuine Oil extends that to 2000 hours (page 137). If high temperature and sluggish response persist, follow the hydraulic troubleshooting chart at page 215.
Manual Section: Hydraulic System TroubleshootingEngine smokes, idles rough, or loses digging power progressively through the day p. 215
Replace the outer air cleaner element every 500 hours; install a new inner element each time the outer is changed (page 175). Change engine oil every 250 hours with the pan and filter holding 9.2 liters (page 148). Check fan belt deflection at 8-12 mm (page 160). For no-start, rough idle, and low-power diagnostics, start at page 215.
Manual Section: Engine TroubleshootingFrequently Asked Questions
What do Yanmar B55W-1 fault codes mean?
The manual describes various warning lights and their meanings. For instance, the Fuel Level Warning Light comes on when the fuel is about 12 liters or less, indicating the tank should be filled immediately. The Engine Overheat Warning Light indicates excessively high coolant temperature, requiring the engine to run at idle until the temperature drops to the white range. The Troubleshooting section also lists problems and their causes for various systems.
What are the torque specs for Yanmar B55W-1 track motor bolts?
The torque specification for the Travel motor mounting bolts (track motor bolts) on the Yanmar B55W-1 is 9.5 - 10.5 kgf.m (69 - 76 ibf.ft). This information is found in the Bolt and Nut Inspection table.
What are the torque specs for Yanmar B55W-1 bucket pin bolts?
When adjusting bucket shimming, the bolts for the bucket attachment point should be torqued to 42 N•m / 4.3 kg•m (31 ft lbs). This ensures proper clearance and prevents excessive wear or noise.
How to check Yanmar B55W-1 error codes
To check error codes, turn the starter switch to the "I" (ON) position. All warning lights on the instrument panel should light up and the warning buzzer should sound for 2 seconds as part of an automatic inspection. If any lights do not come on, they should be replaced or repaired.
What are the replacement specifications for hydraulic filters?
The hydraulic oil return filter should be replaced after the first 250 hours of operation or rebuild, and then every 500 hours thereafter. The pilot filter should also be changed after the first 250 hours on a new machine and every 500 hours thereafter.
What do I get after purchasing this Yanmar B55W-1 manual?
This is a 232-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.
Is this Yanmar B55W-1 Operation Manual printable?
There are no print restrictions. The PDF is DRM-free — print whatever sections you need for the shop. Standard letter or A4 paper works.
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