HT80 データシートの表示（PDF） - Unspecified

部品番号

コンポーネント説明

メーカー

HT80

turbocharger

Unspecified 

HC5A/HX80/82/83/85/HT4B/4C/80 Service Repair Manual

Introduction

Installation Data

1. Holset Service receives many turbocharger returns that are no fault found. Before assuming the

turbocharger is not performing to specification always refer to the engine diagnostic system and the fault

finding chart of this manual to make all the recommended health checks.

2. It is important that intake and exhaust systems are fitted in accordance with the recommendations of

the Equipment and Engine manufacturers. Limiting mass inertia loading is critical to turbocharger wholelife

operation. Maximum engine vibration input must not exceed 8g.

3. The air filter must remove particles greater than 5µm at an efficiency of 95% and be of sufficient capacity

to match the air consumption of the engine. Recommended filters should always be used with a pressure

drop indicator. Intake systems must be capable of withstanding depressions up to 6.9 kPa (1.0 lbf/in2).

4. Hose and clip connections of intake manifold systems must be capable of withstanding the turbocharger

pressure ratio. V band clamps are preferred and must be used above 3:1 pressure ratio.

5. Exhaust systems must be capable of operating at exhaust back pressures of up to 10 kPa (1.5 lbf/in2).

This limit is increased to 13.4 kPa (2.0 lbf/in2) if a catalytic converter is fitted. Exhaust brake applications

are permitted to impose 450 kPa (65.3 lbf/in2) back pressure.

6. Oil should be filtered to 10µm with efficiency of 60% TWA (Time Weighted Average) /20 µm with efficiency

of 85% TWA. Efficiency assessed using ISO Standard 4572/SAE J 1858.

7. The oil quality must be as specified by the engine manufacturer and will be a minimum API SE - CD

(MIL - L - 2104C) specification. Improved life can be obtained by using super high performance diesel

(SHPD) oils, particularly in industrial applications which use extended oil drain periods.

8. Normal oil temperature is 95+/-5°C (203+/-9° F). It should not exceed 120°C (248° F) under any operating

condition.

9. Any pre-lube oil must be clean and meet the minimum CD classification.

10. The orientation of turbine housing, bearing housing and compressor cover is fixed according to

application. During installation, do not attempt to rotate these components. Inclined turbocharger

installation is not recommended. If an installed angle is necessary, oil inlet centreline must be +/- 10

degrees from vertical and rotor centreline +/- 5 degrees from horizontal.

11. Holset permits oil return pipes to decline at an overall angle of not less than 30 degrees below horizontal.

All turbocharger applications require a pipe of internal diameter greater than 25 mm which has

integrated connectors. To ensure oil returns into the engine under all operating conditions, the return

connection into the engine sump must not be submerged and the outlet flange of the turbocharger must

be 50 mm above the maximum oil level of the engine sump pan. Crankcase pressure should be limited

ideally to 0.8 kPa (0.12 lbf/in2) but 1.4 kPa (0.20 lbf/in2) can be accepted by reference to Holset.

12. Oil pressure of 150 kPa (20 lbf/in2) must show at the oil inlet within 3 - 4 seconds of engine firing to

prevent damage to turbocharger bearing system. A flexible supply pipe is recommended. Recommended

oil pressure at full load/ rated speed is 300 kPa (44 lbf/in2) although 600 kPa (88 lbf/in2) is permitted

during cold start up. Under idling conditions pressure should not fall below 70 kPa (10 lbf/in2).

14. Recommended oil flows for the turbochargers are 3.5 litre/min at idleand a minimum of 6 litre/min

above maximum torque speed.

15. Do not use liquid gasket substances or thread sealant as any excess can enter the turbocharger oil

system to obstruct flow.

16. Recommended coolant flows for the turbochargers are 6 litre/min at idle and 13 - 19 litre/min above

maximum torque speed.

Note:

100 kPa = 1 bar (14.5037 lbf/in2 =psi).

1:4

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