# Commission Delegated Regulation (EU) 2017/654 of 19 December 2016 supplementing Regulation (EU) 2016/1628 of the European Parliament and of the Council with regard to technical and general requirements relating to emission limits and type-approval for internal combustion engines for non-road mobile machinery, Appendix 2

Extent: E+W+S+N.I.

Installation requirements for equipment and auxiliaries
The complete inlet system shall be fitted as provided for the intended application:
(i) where there is a risk of an appreciable effect on the engine power;
(ii) when the manufacturer requests that this should be done.
In other cases, an equivalent system may be used and a check should be made to ascertain that the intake pressure does not differ by more than 100 Pa from the upper limit specified by the manufacturer for a clean air filter.
The complete exhaust system shall be fitted as provided for the intended application:
(i) where there is a risk of an appreciable effect on the engine power;
(ii) when the manufacturer requests that this should be done.
In other cases, an equivalent system may be installed provided the pressure measured does not differ by more than 1 000 Pa from the upper limit specified by the manufacturer.
If an exhaust system brake is incorporated in the engine, the throttle valve shall be fixed in the fully open position.
The fuel feed pressure may be adjusted, if necessary, to reproduce the pressure existing in the particular engine application (particularly when a ‘fuel return’ system is used).
The cooling-liquid circulation shall be operated by the engine water pump only. Cooling of the liquid may be produced by an external circuit, such that the pressure loss of this circuit and the pressure at the pump inlet remain substantially the same as those of the engine cooling system.
The thermostat may be fixed in the fully open position.
When the cooling fan or blower is fitted for the test, the power absorbed shall be added to the results, except for cooling fans of air cooled engines directly fitted on the crankshaft. The fan or blower power shall be determined at the speeds used for the test either by calculation from standard characteristics or by practical tests.
Charge air-cooled engines shall be tested with charge air cooling, whether liquid — or air-cooled, but if the manufacturer prefers, a test bench system may replace the air cooler. In either case, the measurement of power at each speed shall be made with the maximum pressure drop and the minimum temperature drop of the engine air across the charge air cooler on the test bench system as those specified by the manufacturer.
The power for electrical or other starting systems shall be provided from the test bed.
Number
Equipment and auxiliaries
Fitted for emission test
1
Inlet system
Inlet manifold
Yes
Crankcase emission control system
Yes
Air flow meter
Yes
Air filter
Yes
Inlet silencer
Yes
2
Exhaust system
Exhaust after-treatment system
Yes
Exhaust manifold
Yes
Connecting pipes
Yes
Silencer
Yes
Tail pipe
Yes
Exhaust brake
No
Pressure charging device
Yes
3
Fuel supply pump
Yes
4
Fuel injection equipment
Prefilter
Yes
Filter
Yes
Pump
Yes
5
High-pressure pipe
Yes
Injector
Yes
Electronic control unit, sensors, etc.
Yes
Governor/control system
Yes
Automatic full-load stop for the control rack depending on atmospheric conditions
Yes
6
Liquid-cooling equipment
Radiator
No
Fan
No
Fan cowl
No
Water pump
Yes
Thermostat
Yes
7
Air cooling
Cowl
No
Fan or Blower
No
Temperature-regulating device
No
8
Pressure charging equipment
Compressor driven either directly by the engine and/or by the exhaust system
Yes
Charge air cooler
Yes
Coolant pump or fan (engine-driven)
No
Coolant flow control device
Yes
9
Auxiliary test-bed fan
Yes, if necessary
10
Anti-pollution device
Yes
11
Starting equipment
Yes or test bed equipment
12
Lubricating oil pump
Yes
13
Certain auxiliaries whose definition is linked with the operation of the non-road mobile machinery and which may be mounted on the engine shall be removed for the test.
The following non-exhaustive list is given as an example:
(i) air compressor for brakes
(ii) power steering compressor
(iii) suspension compressor
(iv) air-conditioning system.
No

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Source: https://www.legislation.gov.uk/eur/2017/654/annex/VI/appendix/2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-654/annex-VI/appendix-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.