1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your MAKO AIRTEK 21M8-50011 Monitor. This monitor is designed as a replacement part for Hyundai Excavator models R60-7 and R55-7. Please read this manual thoroughly before installation and use to ensure safe and efficient operation.
2. Safety Information
WARNING: Improper installation or use can lead to equipment damage or personal injury.
- Always disconnect the excavator's battery before performing any electrical work or installation.
- Ensure all connections are secure and properly insulated to prevent short circuits.
- Only qualified personnel should perform installation and maintenance procedures.
- Do not attempt to modify the monitor or its wiring.
- Keep the monitor free from moisture, dust, and extreme temperatures.
3. Package Contents
Verify that all items are present and undamaged upon opening the package:
- MAKO AIRTEK 21M8-50011 Monitor
- User Manual (this document)
- (Note: Mounting hardware and specific wiring harnesses may be sold separately or integrated with the excavator.)
4. Product Overview
The MAKO AIRTEK 21M8-50011 Monitor provides critical operational data for your Hyundai excavator. Familiarize yourself with the monitor's components.
4.1 Front View

Image 1: Front View of Monitor
This image displays the front panel of the MAKO AIRTEK 21M8-50011 monitor. Key features visible include the central RPM gauge (0-35 x 100rpm), an hour meter display below the RPM gauge, and smaller gauges for temperature (C-H) and fuel level (E-F) at the top. Below the main gauges are several indicator lights and three prominent control buttons labeled 'PRE HEATER' and 'SPEED', along with 'H' and 'M' buttons at the bottom. The overall casing is grey and dark green.
4.2 Rear View

Image 2: Rear View of Monitor
This image shows the back panel of the MAKO AIRTEK 21M8-50011 monitor. A white product label is visible, indicating the model number '21M8-50011' and other manufacturing details. Several electrical connector ports are present, designed for integration with the excavator's wiring harness. The back casing is black with mounting points visible.
5. Setup and Installation
Installation of the monitor requires careful attention to electrical connections and mounting. It is recommended that installation be performed by a certified technician.
- Preparation: Ensure the excavator is turned off and the battery is disconnected. Access the existing monitor location in the excavator's cabin.
- Removal of Old Monitor: Carefully disconnect all wiring harnesses and remove any mounting screws securing the old monitor. Gently extract the old unit.
- Mounting the New Monitor: Position the MAKO AIRTEK 21M8-50011 Monitor into the designated slot. Secure it using appropriate mounting hardware (not included, typically reused from the original unit or purchased separately). Ensure it is firmly seated and does not vibrate.
- Wiring Connections: Connect the excavator's wiring harnesses to the corresponding ports on the rear of the new monitor. Refer to the excavator's service manual for specific wiring diagrams if necessary. Ensure all connections are snug and correctly oriented.
- Final Checks: Once all connections are made, reconnect the excavator's battery. Turn the ignition to the 'ON' position (without starting the engine) to verify the monitor powers on and displays correctly. Check for any error codes or unusual behavior.
- Engine Start: If initial checks are satisfactory, start the excavator engine and observe the monitor's readings (RPM, temperature, fuel, hours) to ensure they are accurate and responsive.
Tip: Please provide your nameplate information to ensure you have the correct product for your specific excavator model.
6. Operating Instructions
The monitor displays vital operational parameters of your excavator. Understanding these displays and controls is crucial for efficient machine management.
6.1 Display Readings
- RPM Gauge: Indicates engine revolutions per minute (x100rpm).
- Hour Meter: Displays the total operating hours of the excavator.
- Temperature Gauge: Shows engine coolant temperature (C for Cold, H for Hot).
- Fuel Gauge: Indicates the fuel level in the tank (E for Empty, F for Full).
- Indicator Lights: Various warning and status lights (e.g., oil pressure, battery charge, hydraulic filter) are located around the main gauges. Consult your excavator's primary manual for specific light meanings.
6.2 Control Buttons
- PRE HEATER: Activates the engine pre-heating system, typically used in cold weather conditions to aid engine starting.
- SPEED: Adjusts engine speed or operating mode settings. Refer to your excavator's primary manual for detailed functions of this button.
- H / M Buttons: These buttons are generally used for navigating menus, adjusting settings, or confirming selections within the monitor's interface. Their specific functions may vary based on the excavator's software version.
7. Maintenance
Proper maintenance ensures the longevity and accuracy of your monitor.
- Cleaning: Use a soft, damp cloth to clean the monitor screen and casing. Avoid abrasive cleaners or solvents that could damage the display or plastic.
- Inspection: Periodically check all wiring connections to the monitor for looseness or corrosion. Ensure the monitor is securely mounted.
- Environmental Protection: Protect the monitor from direct sunlight for extended periods and extreme temperature fluctuations when the excavator is not in use.
8. Troubleshooting
This section addresses common issues you might encounter with your monitor.
| Problem | Possible Cause | Solution |
|---|---|---|
| Monitor does not power on. | No power supply; Loose wiring connection; Blown fuse. | Check battery connection. Inspect wiring harnesses for secure connection. Check excavator's fuse box for a blown fuse related to the monitor. |
| Incorrect or erratic readings. | Faulty sensor; Loose connection; Electrical interference. | Verify sensor connections. Consult excavator service manual for sensor testing. Ensure proper grounding. |
| Buttons are unresponsive. | Software glitch; Physical damage. | Try restarting the excavator (power cycle). Inspect buttons for physical damage. |
| Display is dim or flickering. | Power supply issue; Internal fault. | Check power connections. If problem persists, contact support. |
If you encounter issues not listed here or if the suggested solutions do not resolve the problem, please contact MAKO AIRTEK customer support.
9. Specifications
| Feature | Detail |
|---|---|
| Model Number | 21M8-50011 |
| Compatibility | Hyundai Excavator R60-7, R55-7 |
| Manufacturer | MAKO AIRTEK |
| ASIN | B0BGXPS1P7 |
| First Available | September 30, 2022 |
10. Warranty and Support
MAKO AIRTEK is committed to providing reliable products and customer service.
- Service: We offer 24/7 support for your after-sale problems.
- Contact: If you have any problems or questions, please do not hesitate to contact us. We aim to reply within 1 business day (not including public holidays).
- Work Hours: Monday to Friday.
For assistance, please refer to the contact information provided with your purchase or on the MAKO AIRTEK official website.