Hello All, This is my first post on the site and I believe I am in the right category if not could someone please let me know. Well to start off I have a JD 110 TLB at work and recently it came back that the engine coolant was over heating. So I checked it out sure enough very little coolant in the tanks. The Loader has a cab on it with A/C and Heat. Took that apart and found the leak for the coolant up there in the mechanical valve for the heater. The loader has not been taken care of very well in the last 4 or 5 years we've had it to say the least. It is used for loading trucks up with salt in the winter time so the oil cooler and coolant radiator were very clogged and rusted. I decided to replace them both and change out the hoses for the rad as well as thermostat and hydro/tranny oil and filters.
So I finally got the parts for it all and went to work. Took off the front grill and sides then removed the oil cooler and radiator after draining them both of fluids. then went to work to try and get the hydro filters off..... long story short they were not coming off. The smaller filter would finally spin but not come off figured the moisture/salt probably got to the threads and trashed them. Tried getting the suction side filter off and no dice. So I decided to get new oil filter heads for them. Ordered the heads and o-rings and all then finally came in and put them on yesterday. I got everything put together and filled up the coolant and hydro fluid back up today.
All seemed well after filling everything up checked for leaks and couldn't find anything severe. Only thing that is possibly leaking is a very small wet spot on one of the 2 pumps on the left side of the loader. They were both covered in dirty oil that had been there for a while prior to this, but I believe a hose blew on it that may have caused all of that. Obviously not ruling that out as not a problem but didn't seem to actually be leaking anywhere I could see. Also noticed a little bit of oil on the flexible hose coming from the smaller filter to what looked like into the tranny. Also don't think it was leaking just residual from taking it all apart to put the new oil filter heads on. So I cycled all the lines to make sure everything was working and there were no problems. The engine was also running cool with the new rad and fresh coolant.
After all of that I finally got everything back together thinking it was good. The machine ran for a while and had a guy drive it for a little spin and the temps were fine. So I figured all was well but told him to keep an eye on it and don't be to rough on it just yet to be sure. After about maybe 45 mins or so of use he was moving skids of sod around and he let me know the hydraulic temp was getting high. I checked it and it wasn't overheating exactly but it was getting fairly close to being in the yellow on the temp gauge. I had him stop and I turned the machine off then checked the hydro dip stick to see if the oil was bubbly/foamy. Just by pulling the dipstick the first time it had maybe like 3-4 tiny bubbles on it. Then wiped it off and checked again and maybe 1 or 2 tiny bubbles on it. So my guess is if there were a suction leak there would be a lot more bubbles? I'm not to familiar with hydraulic systems but do work on a lot of our equipment especially our plows in the winter time and have needed to put new gland nuts on the lift cylinders so I've messed with hydraulics just not overly familiar with them. Although being as this is a bigger piece of equipment and after I had taken the oil cooler and filter heads off I figured I'd write this up and get some input.
Also forgot to mention this before but this has done this for a while now long before all of this happened. and I'm not sure if its supposed to or it's just a common stupid problem. When you go to switch the loader from the bucket to the forks and move the Quik-tatch forwards or backwards. One of them moves faster then the other and I'm wondering if there is a restriction there that might cause the temperature to raise possiblly? Just thought I should mention that as a possible cause or issue.
I believe I ran down most of what I did and tried to sum it up a bit to make it as short and sweet as I could. I've been doing some googling trying to look up hydro overheating symptoms and what I've found hasn't been to much of a help so far but i'm keeping at it. I do have the post as overheating but it wasn't exactly overheating but it seemed to be running high for what I thought, and maybe it did run at that temp normally I just never noticed before. Any and all input is appreciated for this I'm wondering if I just put something back together wrong or missed something. Thank you so much for your replies I really appreciate it!