My s150 has 930 hrs on it and I did the 1000 hr service last year, with help from folk on here. But, I did not change the coolant and am wondering how ugly that it. Do I just drain and fill or is a flush the way to go? Should I just get Bobcat coolant? I have read some issues of people mixing incompatible fluids and causing issues. Any advice?
What kind of coolant is it? and what is the engine recommendation? Bobcat didn't make the coolant or the engine, so I wouldn't buy bobcat coolant or listen to anything they say about it. Anytime I drain coolant, check the color and the bottom of the bucket, if you see anything you don't like, fill it with rainwater or distilled water and run it a few hours, then drain and repeat if it's still not clean enough.
My manual says it has purple propylene glycol. I will verify. Just stick with this?
Most diesel or gas engines use ethylene glycol coolants. I understand that propylene glycol is a more environmentally friendly coolant to use. What ever you decide to do, you will want to either use a compatible propylene glycol or perform a complete flush and fill with ethylene glycol. If it was me, I would stay using the Bobcat recommended propylene glycol. Here is an interesting article on glycol coolants: https://www.fleetmaintenance.com/in...emicals/article/21002279/which-glycol-is-best
I recommend sticking with the Bobcat polypropylene glycol. It’s pre-mixed and your machine cooling capacity is small. And, just do a drain and fill. I doubt it needs a “flush”. So much easier than changing chemistries.
OK. Great. Thank you. I will just stick with the Bobcat pre-mix. I have enough other broken stuff to keep me busy. I'll keep this simple. Thanks.