6/13/2019 1:06 PM
We have encountered a similar situation with our 2500Es. I presume they have similar hydraulic reservoirs. This situation only occurred when they were new and after fluid/filter changes. The problem ceases after 2-3 days of oil expansion/contraction. We have been told that due to the design of the main tank and expansion tank, it takes a few days to "burp" the air pocket from the main tank. We just keep topping off until things stabilize. There is a hex plug on the top of the main tank. I reckon maybe one could fill the main tank through it and then bring the expansion tank to the proper level afterwards as a different approach. Hope this helps.