Table of contents: Removal and installation ↓ Examination ↓
Removal and installation
WARNINGS:
- Avoid contact of oils and greases with the vacuum hose and valve.
- Place the hose on the fittings as shown in the figure.
- When installing the valve, ensure correct orientation.
Examination
Vacuum hoses must not have cracks, signs of abrasion or destruction.
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The valve must hold a vacuum when a vacuum pump is connected to it from the booster side.
Vacuum sensor (diesel engines). Check the resistance between the sensor contacts. If the vacuum at the sensor input is less than 26.7 kPa (200 mmHg.) the contacts must be closed, and if the vacuum is more than 33.3 kPa (250 mmHg.) — open.
Vacuum pump (diesel engine). Connect a vacuum gauge and check the vacuum at the pump outlet.
For the CD20 engine it should be at least 86.6 kPa (650 mm Hg.) at a rotation speed of 1000 min⁻¹, and for the CD20E engine - not less than 93.3 kPa (700 mm Hg.) at idle (800 min⁻¹).