New Holland T4.85 Service Manual page 72

Engine - Exhaust Gas Recirculation (EGR) - Diesel Particulate Filter (DPF) exhaust treatment
11. Remove the left-hand clamp (1) fastening the filter to
the machine.
12. Loosen the left-hand clamp (1) fastening the middle
and left parts of the filter.
13. Remove the left-hand part of the filter (1), with the
clamp (2), retrieving the copper seal.
14. Then, after you have loosened the right-hand clamp
(1), remove the central part of the filter (2).
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MOIL12APL109
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MOIL12APL105
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MOIL12APL110
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MOIL12APL108