JCB 85Z-2 Mini Excavator

The JCB 85Z-2 Mini Excavator is a versatile and reliable machine; however, like any heavy equipment, it can experience issues over time. Below are some common problems associated with this excavator, along with possible causes and solutions:

1. Hydraulic System Issues

Problems:
- Slow or unresponsive hydraulic movement.
- Leaking hydraulic fluid.
- Overheating of hydraulic fluid.
Causes:
- Contaminated or low hydraulic oil.
- Clogged filters or faulty seals.
- Air in the hydraulic system.
Solutions:
- Regularly check and maintain hydraulic fluid levels and quality.
- Replace clogged filters and worn-out seals promptly.
- Bleed the hydraulic system to remove air.

2. Engine Starting Problems

Problems:
- Difficulty starting the engine.
- Engine cranks but does not start.
Causes:
- Battery issues (low charge or faulty connections).
- Blocked fuel filters or air filters.
- Faulty starter motor or ignition system.
Solutions:
- Inspect and clean battery terminals, and charge or replace the battery if needed.
- Replace fuel and air filters regularly.
- Check the starter motor and ignition system for faults.

3. Track or Undercarriage Wear

Problems:
- Uneven track wear or slipping.
- Difficulty in manoeuvring.
Causes:
- Misalignment of tracks.
- Insufficient track tension.
Solutions:
- Adjust track tension according to the manufacturer’s guidelines.
- Regularly inspect and align tracks.
- Replace worn-out tracks promptly.

4. Electrical System Malfunctions

Problems:
- Non-functional controls or dashboard indicators.
- Blown fuses or wiring issues.
Causes:
- Corroded wiring connections.
- Damaged or loose electrical components.
Solutions:
- Inspect and repair corroded connections.
- Replace blown fuses and damaged wiring.
- Ensure all electrical components are properly secured.

5. Overheating Engine

Problems:
- Engine overheating during operation.
Causes:
- Low coolant levels.
- Clogged radiator or cooling system.
- Faulty thermostat or water pump.
Solutions:
- Regularly check and top off coolant levels.
- Clean the radiator and cooling system periodically.
- Replace a faulty thermostat or water pump.

6. Boom or Arm Movement Problems

Problems:
- Erratic or jerky movements.
- Difficulty holding positions.
Causes:
- Worn-out hydraulic cylinders or seals.
- Insufficient hydraulic fluid pressure.
Solutions:
- Replace damaged hydraulic cylinders or seals.
- Inspect and maintain proper hydraulic pressure levels.

7. Fuel System Issues

Problems:
- Loss of power or stalling during operation.
Causes:
- Dirty fuel or clogged injectors.
- Air in the fuel lines.
Solutions:
- Use clean and high-quality fuel.
- Clean or replace fuel injectors as needed.
- Bleed air from the fuel system.

8. Cab Comfort and Control Problems

Problems:
- AC or heater not functioning properly.
- Unresponsive control levers or joystick.
Causes:
- Faulty HVAC system components.
- Damaged or worn control linkages.
Solutions:
- Inspect and repair HVAC components.
- Lubricate or replace control linkages if necessary.

Preventive Maintenance Tips

Regular Inspections: Conduct daily checks on vital components, such as the hydraulic system, engine, tracks, and electrical wiring.
Scheduled Servicing: Adhere to the manufacturer’s recommended maintenance schedule.
Operator Training: Ensure operators are trained to use the machine correctly and report any issues promptly.
Proper Storage: Store the excavator in a clean and dry environment to prevent corrosion and wear.

By addressing these issues early and maintaining a proactive approach to maintenance, the JCB 85Z-2 Mini Excavator can deliver optimal performance and longevity. For persistent problems, consult a professional technician- That’s us!

Spares & parts bibliography

For all spares and parts we recommend our sister company – HTS Spares

For all JCB excavator parts: JCB Style Excavator Spares | All products shown are quality replacement parts and are not genuine JCB products.