I have a less than year old Cat 289D with about 300 hours and have an issue that I suspect is a problem. Specifically, when you put it under load, like pushing a pile of gravel, it makes a loud whining noise that I am guessing is the hydraulic pump. The more the load, the louder it gets. There is no noise when just grading or normal light usage. It did this same thing about a month ago and I changed the hydraulic filter and it seemed to get better. Obviously, I checked the hydraulic fluid level and that is fine. Is this normal or should I be calling Cat to come check it out. Thanks for any advice.
Can you hear or feel the pump destroke or does the machine die if you keep pushing it into the pile?
Speak to your customer service rep. If there's a problem developing you need to at least bring it to their attention before it gets to one year old.
Is it still under warranty..? If yes (even if no) call your dealer sooner rather than later.
Not at all normal. Call CAT and get it looked at ASAP ! ....
Thanks for all the responses. I guess I will be calling Cat.
Check the air to air boots and clamps . Escaping boost pressure will make an awful squeal , and usually happens under load when boost pressure maxs out.