1204F - DEF System Supplement
2.5 DEF Tank
2.5.1 General
• The DEF tank is an emissions related component and should be selected from Perkins
product offering.
• The tank must be selected to suit the operational use of the machine- equivalent to a
minimum of 4% of fuel consumption (1:1 DEF to Diesel fuel refill rate). Ref 5.4.1
• The DEF tank should be identified with the correct symbol on the fluid container or Fill
point. The symbol markings should be in accordance to ISO 22241 and ISO 2575.
• The colour is to be associated with the DEF fill point or cap should be blue as
referenced in the standard.
• The DEF tank feed line must be submersed in all operating conditions.
• The DEF tank assembly must not be modified in any way from the supplied condition
2.5.2 Positioning
• The DEF tank must be mounted in a location to meet the temperature requirements of the
DEF fluid and the DEF tank as tabulated in section 4.3.1
• All temperatures must be tested in accordance with the defined test procedure
• The DEF tank must not be mounted in a location that is prone to dust or debris build up;
• Which could cause physical damage to the tank or attached components.
• Which could collect around the tank filler cap.
• The tank filler and drainage plug should be distanced or isolated from components which
are not resistant to DEF in the event of spillage.
• The DEF tank must be positioned so that it is easily accessible for servicing, replenishing,
draining and replacing the DEF.
• The DEF tank location must not risk contamination of the DEF with service fluids i.e. under
oil or fuel filters
• The DEF tank must be protected from impact and projectiles
• The DEF tank must be protected from side loading
• The DEF tank drainage plug must be accessible
A&I manual Publication TPD 1832 – Production issue 3. Page 8 of 41
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