Part of the Hyundai Repair Manuals.
Every one of the 574 pages in this Hyundai R95W-3 Service Manual PDF is aimed at a single machine: the R95W-3 wheeled excavator, from the main pump to the rear axles. You get full hydraulic circuit schematics, electrical wiring diagrams with component locations, and exploded views covering the main control valve, swing motor, travel reduction gear, and transmission. A complete troubleshooting section walks the hydraulic and mechanical systems fault by fault, backed by a metric bolt torque chart and operational performance tests for checking a tired machine against factory numbers. Set the pilot relief valve at 40 kg/cm2, then pull the turning joint mounting bolts to 29.7 kgf.m before you button anything up. Tired of guessing which relief valve is bleeding your pressure? Bookmarked and keyword-searchable; download it, pull it up beside the machine, and get back to work.
What's Inside This Hyundai R95W-3 Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 1-28 | Safety Hints, Specifications |
| Structure and Function | 29-102 | Pump Device, Swing Device, Main Control Valve, Travel Device, Rcv Lever |
| Hydraulic System | 103-131 | Hydraulic Circuit, Main Circuit |
| Electrical System | 132-190 | Component Location, Monitoring System, Electrical Circuit |
| Troubleshooting | 191-228 | Before Troubleshooting, Hydraulic and Mechanical System |
| Maintenance Standard | 229-239 | Operational Performance Test, Major Components, Track and Work Equipment |
| Precaution and Tightening Torque | 240-246 | Removal Work, Installation Work, Tightening Torque, Metric Bolt Torque Chart |
| Pump Device | 247-252 | Removal, Installation, Main Pump Disassembly, Gear Pump Disassembly |
| Main Control Valve | 253-288 | Tools and Jig, Disassembly, Assembly, Relief Valve, Port Plug |
| Swing Device | 289-304 | Relief Valve, Swing Motor Removal, Swing Motor Disassembly, Swing Motor Assembly |
| Travel Device and Reduction Gear | 305-314 | Reduction Gear Removal, Reduction Gear Disassembly, Reduction Gear Assembly, Motor Unit, Regulator |
| Rcv Lever and Accelerator Pedal | 315-343 | Rcv Lever Disassembly, Rcv Lever Assembly, Accelerator Pedal Disassembly, Accelerator Pedal Assembly |
| Turning Joint, Steering Valve, and Transmission | 344-430 | Turning Joint Removal, Steering Valve Disassembly, Transmission Removal, Transmission Disassembly, Transmission Assembly |
| Axles and Work Equipment | 431-574 | Front Axle Removal, Rear Axle Removal, Steering Cylinder, Bucket Cylinder, Arm Cylinder, Boom Cylinder |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Bypass check valve setting pressure | 1.5kg/cm2 (21psi) | p. 105 |
| Bypass relief valve opening pressure | 3.0kg/cm2 (43psi) | p. 105 |
| Fuel low level lamp threshold | 22 L | p. 141 |
| Turning joint mounting bolt, nut | 29.7±3.2 kgf·m | p. 244 |
| Main pump mounting bolt | 12.2±1.3 kgf·m | p. 244 |
| Engine Oil Capacity | 10L | p. 28 |
| Hydraulic Tank Capacity | 90L | p. 28 |
| Engine Rated Gross Horse Power | 77Hp | p. 24 |
| Main Pump Rated Pressure | 280kgf/cm2 | p. 24 |
| Swing Motor Relief Pressure | 190kgf/cm2 | p. 25 |
| Travel Motor Relief Pressure | 280kgf/cm2 | p. 25 |
Hyundai R95W-3 Common Problems This Manual Covers
Hyundai R95W-3 hydraulic functions weak and slow, boom loses lifting power under load
Check hydraulic oil level first; the tank holds 90 L and low fluid starves the pump. Test main pump output against the 280 kgf/cm2 rated pressure listed on page 24. If pump pressure holds but functions stay weak, measure pilot pressure; compare pilot pressure against the pilot circuit relief setting in the hydraulic system section.
Manual Section: Attachment System Troubleshooting p. 24Hydraulic oil overheats and turns cloudy after an hour of steady digging
Drain a sample and inspect for water or air contamination; cloudy oil means cavitation or moisture in the system. Verify the tank is filled to its 90 L capacity per page 28 and replace clogged return filters. Measure drain oil pressure at the motors; anything above the 1.5 kg/cm2 (21 psi) limit on page 106 points to internal leakage heating the oil.
Manual Section: Hydraulic System Troubleshooting p. 28Swing speed low and upper structure drifts after stopping on a slope
Test swing motor relief pressure; the spec is 190 kgf/cm2 on page 25. Low readings point to a worn relief valve or motor seals, and disassembly procedures start on page 289. Verify the swing parking brake releases fully and inspect the brake valve before condemning the motor itself.
Manual Section: Swing System Troubleshooting p. 25Engine cranks but will not start, monitor panel flickers or goes blank
Check battery voltage and clean both ground connections before chasing wiring. Verify actual fuel level; the low fuel lamp only trips below 22 L per page 141, and a faulty gauge can mask an empty tank. Test the safety solenoid circuit against the wiring diagram, then check the start relay and fuses.
Manual Section: Electrical System Troubleshooting p. 141Whining or grinding noise from the main pump, gets worse at high idle
Check for cavitation first: verify oil level in the 90 L hydraulic tank and inspect the suction line for collapsed hoses or air leaks at the fittings. If the noise continues, pump disassembly and inspection procedures start on page 247. Torque the main pump mounting bolts to 12.2 kgf·m per page 244 on reinstall.
Manual Section: Drive System Troubleshooting p. 244Frequently Asked Questions
What is the tightening torque for the engine mounting bolts on the Hyundai R95W-3?
The tightening torque for the engine mounting bolts (engine-bracket) is 10.0 ± 0.5 kgf·m (72.3 ± 3.6 lbf·ft). For the engine mounting bolts (bracket-frame), the torque is 48.0 ± 2.0 kgf·m (347 ± 14.5 lbf·ft). p. 244
What is the oil change interval for the axle on the Hyundai R95W-3?
The oil change interval for the axle is 500 hours for the first change, and every 1000 hours or at least once a year thereafter. p. 433
What is the procedure for bleeding air from the hydraulic pump after installation?
After installation, remove the air vent plug (2EA), tighten it lightly, start the engine at low idling, check that oil comes out from the plug, and then tighten the plug fully. Finally, run the engine at low idling for 3 to 5 minutes to circulate the oil. p. 248
What is the minimum thickness for the braking disks on the Hyundai R95W-3?
The minimum thickness (S) for the braking disks is 4.5mm. If the thickness is below this, the braking disks and intermediate disks should be replaced. p. 435
What is the tightening torque for the transmission mounting bolts?
The tightening torque for the transmission mounting bolts (M20) is 44 ± 2 kgf·m (318 ± 14 lbf·ft). p. 380
How is this Hyundai R95W-3 Service Manual delivered?
A single searchable PDF file of 574 pages, downloadable right after payment. Nothing ships, nothing waits in the mail.
Can I print a copy of this Hyundai R95W-3 Service Manual for the shop?
Printing is allowed without restriction. Pull the pages you need for the job and bin them when they get greasy.
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