Part of the Hyundai Repair Manuals.
Wrenching on a Hyundai R145 series? This 517-page Hyundai R145CR-9, R145CRD-9, R145LCR-9 service manual PDF covers all three crawler excavator variants, from the pump device and main control valve down to the undercarriage. Inside: full electrical circuit diagrams with connector pinouts, hydraulic schematics for the main and pilot circuits, and troubleshooting trees for the hydraulic, electrical, and mechatronics systems, self-diagnostic codes included. You also get operational performance test standards, exploded assembly views, and step-by-step disassembly procedures for the swing device, travel motor, and turning joint. Torque the track roller mounting bolts to 29.6 kgf·m (214 lbf·ft) and the main pump socket bolts to 22 kgf·m (159 lbf·ft), straight from the factory tables. Your excavator is down; forum guesses won't lift it. Bookmarked and text-searchable, the PDF opens on your phone right at the machine. Download it and get back to digging.
What's Inside This Hyundai R145CR-9, R145CRD-9, R145LCR-9 Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 1-38 | Safety Hints, Specifications |
| Structure and Function | 39-115 | Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever, Rcv Pedal |
| Hydraulic System | 116-148 | Hydraulic Circuit, Main Circuit, Pilot Circuit, Single Operation, Combined Operation |
| Electrical System | 149-199 | Component Location, Electrical Circuit, Electrical Component Specification, Connectors |
| Mechatronics System | 200-249 | Outline, Mode Selection System, Automatic Deceleration System, Monitoring System |
| Troubleshooting | 250-319 | Before Troubleshooting, Hydraulic and Mechanical System, Electrical System, Mechatronics System |
| Maintenance Standard | 320-354 | Operational Performance Test, Major Components, Track and Work Equipment |
| Disassembly and Assembly | 355-502 | Precaution, Tightening Torque, Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever, Turning Joint |
| Component Mounting Torque | 503-517 | Introduction Guide, Engine System, Electric System, Undercarriage, Structure, Work Equipment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Bypass relief valve opening pressure | 1.5 kgf/cm2 | p. 119 |
| Battery | 12V x 80Ah (2EA) | p. 171 |
| Play between piston (1) & shoe caulking section (3) | 0-0.1 mm | p. 341 |
| Track roller mounting bolt | 29.6 ± 3.2 kgf·m (214 ± 23.1 lbf·ft) | p. 359 |
| Main pump mounting socket bolt | 22 ± 1.0 kgf·m (159 ± 7.2 lbf·ft) | p. 359 |
| Pipe and hose (flare type) 1/4" thread | 4 kgf·m (28.9 lbf·ft) | p. 361 |
| Pipe and hose (flare type) 3/8" thread | 5 kgf·m (36.2 lbf·ft) | p. 361 |
| Tightening torque for track roller bolts (Item 7) | 29.7±4.4 kgf·m (215±31.8 lbf·ft) | p. 512 |
| Tightening torque for main pump mounting bolts (Item 10) | 22±1.0 kgf·m (159±7.2 lbf·ft) | p. 509 |
| Travel Speed (low/high) | 3.2/5.5 km/hr | p. 23 |
| R145CR-9 | ||
| Operating Weight | 14600 kg | p. 23 |
| R145CRD-9 | ||
| Operating Weight | 15400 kg | p. 24 |
Hyundai R145CR-9, R145CRD-9, R145LCR-9 Common Problems This Manual Covers
Hyundai R145CR-9 hydraulic pump whines after removal and reinstall, bucket lift weak and slow
Check hydraulic oil level with all cylinders retracted before startup; the tank holds 96 L, listed on page 38. Bleed air from the pump housing, torque the main pump mounting bolts to 22 kgf\u00b7m per page 509, and clean the suction strainer if the whine continues at low idle.
Manual Section: Hydraulic and Mechanical System Troubleshooting p. 254All hydraulic functions weak under load, relief valve squeals when circuits stall
Test main relief pressure with a gauge on the pump test port; spec is 350 kgf/cm2, shown on page 36. If pressure reads low, adjust or replace the relief valve before condemning the pump, then work through the diagnostic steps starting to isolate the circuit.
Manual Section: Hydraulic and Mechanical System TroubleshootingEngine warning lamp blinks, cluster shows communication error between MCU and engine ECM
Check the machine error code table on page 215 and write down every stored code before clearing anything. Inspect the CAN wiring between the MCU and engine ECM for chafing and corroded pins using the wiring diagram on page 152. Verify supply voltage from both 12V x 80Ah batteries and clean the ground connections.
Manual Section: Machine Error Codes Table p. 215Hydraulic hose fittings around the boom base seep oil after winter storage
Release residual pressure before loosening any fitting; cycle all controls with the engine off. Retorque flare fittings to the values on page 361: 4 kgf\u00b7m for 1/4 inch thread, 9.5 kgf\u00b7m for 1/2 inch. Replace any hose with a cracked outer cover and recheck level in the 96 L tank.
Manual Section: Disassembly and Assembly p. 361Engine cranks slowly in cold weather and won't start without a jump
Test both 12V x 80Ah batteries under load; the spec is listed on page 171. Charge slowly if voltage is down, and never charge a frozen battery. Clean and tighten the terminals and ground straps, then check engine oil viscosity for the season; the crankcase holds 17.5 L, page 35.
Manual Section: Electrical System TroubleshootingFrequently Asked Questions
How do I clear fault codes on the Hyundai R145CR-9?
To clear logged faults, navigate to the 'Monitoring' menu on the cluster, select 'Logged fault', and then select the 'Delete fault' option. The system will prompt you to confirm the deletion of all logged faults. p. 214
Where is the diagnostic connector located on the Hyundai R145CRD-9?
The diagnostic connector (RS232 & J1939 service socket) is identified as component number 21 on the component location diagram for the electrical system. p. 150
What is the tightening torque for the engine mounting bolts on the R145CR-9?
The engine mounting bolt (engine-bracket) requires a tightening torque of 10 ± 1.0 kgf·m (72.3 ± 7.2 lbf·ft). p. 359
What is the hydraulic tank capacity for the R145CR-9?
The hydraulic tank capacity is 96 liters (25.4 U.S. gal). p. 362
What is the standard tightening torque for a PF 1/2 plug?
The standard tightening torque for a PF 1/2 plug is 10.0 kgf·m (72.3 lbf·ft). p. 367
Is this Hyundai R145CR-9 Service Manual a digital download?
A single searchable PDF file of 517 pages, downloadable right after payment. Nothing ships, nothing waits in the mail.
Is this Hyundai R145CR-9 Service Manual printable?
Zero restrictions. The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
Reviews
There are no reviews yet.