Test Procedures
19
Test Procedures
Preparation of Vehicle Prior to Tests
This is a guidance note, similar to that which will be found in the Vehicle and Operator
Services Agency (VOSA) inspection manual.
Checks on Vehicle Before Tests
As a general precaution, check:
1.
That the vehicle has enough engine oil.
2.
The coolant level is correctly topped up.
3.
There is sufficient fuel to carry out the test.
4.
There are NO defects or suspected faults. It is advised to seek advice from a
qualified automotive service engineer and have them rectify any faults in
advance of the test.
5.
Confirm the engine is at normal operating temperature.
For cars and light commercial vehicles (Category A) it is preferred to use an oil
temperature probe inserted into the dipstick tube of the engine.
6.
There are no obvious signs that the fuel injection pump governor has been
tampered with (e.g. seals are in place).
7.
The condition of the camshaft belt (where visible).
8.
Raise engine to around 2500 rpm or half the maximum engine speed, if it is
lower. Hold it steady for 30 seconds to ensure the system is properly purged.
9.
Raise engine speed slowly to establish operation of governor, by monitoring
engine speed and its stabilised maximum.
Visual Test
Applies to all cars and light commercial vehicles up to and including 3500 Kg, first
used before 1st August 1979 (Category A).
The test will be a visual one, it does not require a diesel smoke meter test. Follow the
visual inspection outlined in the VOSA inspection manual.
Metered Smoke Test
Applies to all cars and light commercial vehicles up to and including 3500 Kg, first
used after 1st August 1979 (Category A). This also applies to all heavy goods vehicles
and large passenger vehicles.
The vehicle must be tested using a metered smoke test.
Содержание OmiSmoke
Страница 2: ......
