08/12/19
Message Overview:
Fault Message:
HYD 2 HI TEMP
Fault Code:
0000H2HT
Associated CAS:
| Reporting LRU: | Data Acquisition Unit (DAU) 2 |
| System Description: | 29-30-00 |
| Schematic Diagram: | 29-12-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wiring Diagram: | 29-00-04 [ Global Express ] [ G5000 ] [ Global XRS ] |
Fault Description:
The temperature of Hydraulic System 2 fluid reaches 205°F (96°C) or higher.
Possible Causes:
- Left Wing Feed Fuel Tank
- Engine Driven Pump (EDP) 2A
- AC Motor Driven Pump (ACMP) 2B (B52)
- Hydraulic Fluid Filter Manifold
- Open Pressure Relief Valve
- Hydraulic Heat Exchanger Bypass Valve
- Hydraulic System 2 Reservoir Temperature Transducer (MT141)
- Hydraulic System 2 Filter Element
- Data Acquisition Unit (DAU) 2 (A18)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Quick Links:
| Pressure Refueling | AMM 12-11-01-650-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Quantity Check of the Hydraulic Fluid in the No. 1 and No. 2 Hydraulic Systems | AMM 12-12-00-610-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the Engine-Driven Hydraulic Pumps | AMM 29-12-01-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Engine-Driven Hydraulic Pumps | AMM 29-12-01-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the No. 1 and No. 2 Hydraulic-System AC-Motor-Driven Pumps | AMM 29-12-05-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the No. 1 and No. 2 Hydraulic-System AC-Motor-Driven Pumps | AMM 29-12-05-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the No. 1 and No. 2 Hydraulic-System Filter Manifolds | AMM 29-12-09-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the No. 1 and No. 2 Hydraulic-System Filter Manifolds | AMM 29-12-09-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the No. 1 and No. 2 Hydraulic-System Pressure-Filter Elements | AMM 29-12-13-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of No. 1 and No. 2 Hydraulic-System Pressure-Filter Elements | AMM 29-12-13-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the No. 1 and No. 2 Hydraulic-System Return-Filter Elements | AMM 29-12-17-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the No. 1 and No. 2 Hydraulic-System Return-Filter Elements | AMM 29-12-17-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the No. 1 and No. 2 Hydraulic-System Case-Drain Filter Elements | AMM 29-12-21-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the No. 1 and No. 2 Hydraulic-System Case-Drain Filter Elements | AMM 29-12-21-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the No. 1 and No. 2 Hydraulic-System Heat-Exchanger Bypass-Valves | AMM 29-12-45-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the No.1 and No.2 Hydraulic-System Heat-Exchanger Bypass-Valves | AMM 29-12-45-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the Hydraulic Temperature Transducers | AMM 29-33-01-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Hydraulic Temperature Transducers | AMM 29-33-01-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the Data Acquisition Units (DAU) | AMM 31-42-01-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Data Acquisition Units (DAU) | AMM 31-42-01-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wire Repair - Maintenance Practices - ALL | SPM 20-12-10-02 [ Global Express ] [ G5000 ] [ Global XRS ] |
Troubleshooting Recommendations:
- Carry out a quantity check of the hydraulic system 2.
- If system low quantity found, service system, check system for leaks and do close out.
- If quantity is good, continue with next step.
- Ensure fuel is present in the wing(s).
NOTE: Hydraulic system 1 fluid heat exchanger is located at the bottom of the right wing fuel tank. Low fuel quantity in the right wing fuel tank can cause high hydraulic fluid temperature. - Operate ACMP 2B and EDP 2A individually and note temperature indication.
- If high (above normal range) temperatures are noted with either pump, replace ACMP 2B and do close out.
- If normal temperature are noted with pump, continue with next step.
- Replace Hydraulic System 2 Filter Element.
- If system checks are good, do close out.
- If fault remains, continue with next step.
- Swap the reservoir temperature transducer 2 (MT141) with the reservoir temperature transducer 1 (MT138).
- If system checks are good, replace reservoir temperature transducer 2 and do close out.
- If fault remains, continue with next step.
- Perform wiring checks between Hyd System 2 Reservoir Temperature Transducer (MT141) and DAU 2.
- If wiring checks are not good, repair defective wiring as required and do close out.
- If wiring checks are good, continue with next step.
- Swap DAU 2 with DAU 4.
- If system checks are good, replace DAU 2 and do close out.
- If fault remains, continue with next step.
- Swap hydraulic filter manifolds.
- If system checks are good, replace defective hydraulic filter manifold and do close out.
- If fault remains, continue with next step.
- Replace heat-exchanger bypass-valve.
- Do close out.