Part of the Hyundai Repair Manuals.
Every one of the 684 pages in this Hyundai R55-7 Service Manual PDF targets one machine: the R55-7 crawler excavator. You get full electrical circuit diagrams with connector pinouts, complete hydraulic schematics covering the main and pilot circuits, and a dedicated troubleshooting section that walks hydraulic, mechanical, and electrical faults from symptom to cause. Teardown and rebuild procedures cover the pump device, main control valve, swing and travel motors, turning joint, and every cylinder on the boom, arm, and bucket. Torque the steel track shoe bolts to 19 kgf·m and replace the chain once link pitch stretches past the 139 mm repair limit. Your excavator is down and the clock is running. This bookmarked PDF opens on any device; jump straight to the spec, then get back in the seat.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 1-31 | Safety Hints, Specifications |
| Structure and Function | 32-81 | Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever |
| Hydraulic System | 82-112 | Hydraulic Circuit, Main Circuit, Pilot Circuit |
| Electrical System | 113-162 | Component Location, Monitoring System, Electrical Circuit |
| Troubleshooting | 163-201 | Before Troubleshooting, Hydraulic and Mechanical System |
| Maintenance Standard | 202-239 | Operational Performance Test, Major Components, Track and Work Equipment |
| Disassembly and Assembly | 240-394 | Precaution, Tightening Torque, Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever, Turning Joint |
| Introduction Guide | 395-396 | Bolt Specifications, Standard Torque Values, Metric Fasteners, Cleaning Components |
| Engine System | 397-399 | Engine Mounting, Cooling System, Fuel Tank Mounting, Electric Components |
| Electric System | 400 | Electric Components Mounting, Travel Alarm, Battery Relay, Fuel Filler Pump |
| Hydraulic System | 401 | Hydraulic Components Mounting, Main Control Valve, Cylinders, Turning Joint |
| Undercarriage | 402-403 | Adjust Component, Idler, Track Chain, Swing Bearing |
| Structure | 404 | Cab Mounting, Door Latch, Cowling Mounting, Counterweight |
| Work Equipment Mounting Torque | 405 | Boom Cylinder, Arm Cylinder, Bucket Cylinder, Side Cutter |
| Yanmar TNV Engine, Service Manual | 406-559 | Engine Troubleshooting, Lubrication System, Cooling System, Fuel Injection Pump, Turbocharger, Service Standards, Engine Tightening Torque, Disassembly and Reassembly |
| Yanmar TNV Engine, Starting Motor | 560-595 | Starting Motor Construction, Performance Test, Disassembly and Inspection, Brush and Commutator Wear Limits |
| Yanmar TNV Engine, Alternator | 596-620 | Alternator Construction, Output Characteristics, Disassembly and Inspection, Rotor and Stator Checks |
| Yanmar TNV Engine, Fuel Injection Pump Service | 621-684 | Safe Servicing, General Information, Injection Pump Disassembly, Adjustment of Fuel Injection Pump, Injection Timing |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Battery specification | 12V x 100Ah | p. 139 |
| Fuel cut-off rated full current | 12V 33A | p. 142 |
| Fuel cut-off rated hold current | 12V 0.8A | p. 142 |
| Tightening torque (Steel shoe) | 19 ± 1.0 kgf·m | p. 232 |
| Link pitch (Steel shoe) | 135 mm (Standard), 139 mm (Repair limit) | p. 232 |
| Outside diameter of bushing (Steel shoe) | 35 mm (Standard), 31 mm (Repair limit) | p. 232 |
| Engine and accessories mounting tightening torque (Item 1: M8x1.25) | 2.5±0.5 kgf·m (18.1±3.6 lbf·ft) | p. 397 |
| Water separator tightening torque | 15-20 Nm (1.5-2.0 kgf-m) | p. 455 |
| Fuel filter tightening torque | 20-24 Nm (2.0-2.4 kgf-m) | p. 456 |
| Operating weight | 5700 kg | p. 21 |
| Swing speed | 9.6 rpm | p. 29 |
| Engine oil quantity | 9.2 L | p. 28 |
