Chris
I am also an Yanmar ea2400 owner. Great little tractor and has accounted for itself very well in the 160 hours since I bought it brand new. I bought it from Sota Tractors in 2012 when they were one of several businesses that had the rights to retail new Yanmar tractors in Australia. Sometime since then these rights were granted solely to Tractor World in Nerang Qld. Despite its name, it seems to be a small outfit - they have a small outlet in Mittagong and, I think, somewhere in Victoria. I can't get much info from their website and I don't think they don't seem to operate a mobile service. I have used them for the filters needed to carry out routine maintenance on the tractor. Information on carring out routine maintenance is well covered in the owners manual - if you don't have this then look up the manual for a Yanmar SC2400 tractor - it's the US version of exactly the same tractor (except for the fel because of our safety laws requiring that loaders are self levelling). Or ask Tractor World - they should send you an online version for free. Attached is a link to a detailed technical manual for a Yanmar SC2450 (same as SC2400 with the addition of a backhoe).
Sc2450 Sc Series Sub-Compact Tractor - Technical Manual
John