Def Filler Cap; Def Tank Header - Perkins 1200F Series Supplement Manual

4.2.2 DEF Filler Cap

The DEF cap is designed such that it cannot be installed on other type of tanks (fuel, coolant, etc)
and conversely, other caps cannot be used on the DEF tank. The cap shall be UV resistant and
resistant to splashing from diesel, coolant, DEF, hydraulic fluid, motor oil and water.
•
The cap shall be coloured blue and the symbol and marking is done according to ISO 22241-
1 and ISO 2575.
•
The cap shall meet cleanliness requirements of ISO 22241-3.
The DEF cap features are:
•
Cap lanyard
•
Design clearances require 90° turn to remove cap
•
Open venting to eliminate the build-up of pressure in the tank as gases/fluids expand as
temperature increases per DEF Pump specifications.
• Cap Filter with Filtration Value - 100μ with a 4µ hydrophobic membrane.

4.2.3 DEF tank header

The tank header can be supplied installed in the DEF tank as part or supplied loose for fitment to an
OEM designed tank (both in same engine option).
Fig 4.3 below shows the different elements that go to make up the Perkins DEF tank header
The correct fitment of the coolant lines to the DEF tank header is critical to ensure the venting of air
and thawing efficiency. Arrows are cast into the header to identify inlet/outlet and customer lines
should be marked or labelled to ensure the correct match is made.
DEF level
and temp
sensor
assembly
DEF Connector
Coolant Connectors
A&I manual Publication TPD 1832 – Production issue 3.
DEF tank
heating tube
(engine coolant
flow internally)
DEF suction filter
on pick up
Fig 4.3 – DEF Tank header
Inlet
5/16" SAE J2044 quick connect
(return from injector)
5/8" un-barbed outer diameter
(from engine)
Table 4.1- DEF tank header customer connections
1204F - DEF System Supplement
DEF outlet
Coolant inlet
Outlet
3/8" SAE J2044 quick connect
(supply to delivery system)
5/8" un-barbed outer diameter
(return to engine)
Electrical connection
flying lead – 375mm long
DEF inlet
Coolant outlet
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