parking brake noisy

[uffda]

ON MY 743, WHEN I USE THE PARKING BRAKE IT IS REALLY LOUD AND COMES FROM UNDER THE CAB. WHAT IS CAUSING THIS? DON'T THINK IT SHOULD BE THIS LOUD

 

[brdgbldr]

ON MY 743, WHEN I USE THE PARKING BRAKE IT IS REALLY LOUD AND COMES FROM UNDER THE CAB. WHAT IS CAUSING THIS? DON'T THINK IT SHOULD BE THIS LOUD

What do you mean by loud?
What kind of noise is it making?

The brake works by two pads squeezing a disk that, when the machine has stopped, does not spin. So no noise should be coming from the brake when it is engaged. Unless the machine is trying to move with the brake on, which then the noise could be the relief valve engaging or if the brake pads are worn and the machine moves when the brake is on then the brakes could make noise.

Does your machine creep when the levers are in neutral?

 

[uffda]

I worked on the creep today and got it pretty good. The brake sound is coming from the pump area. I read another discussion where there is bronze filter that should be cleaned. It sounds like this could be the problem,

 

[brdgbldr]

I worked on the creep today and got it pretty good. The brake sound is coming from the pump area. I read another discussion where there is bronze filter that should be cleaned. It sounds like this could be the problem,

Here is a link to the parts catalog:

Bobcat Parts Catalog - Find Diagrams for Your Equipment - Bobcat Company

Locate all parts and component information about your Bobcat equipment with detailed visual diagrams and illustrations with parts numbers and add to your list.

partscatalog.bobcat.com

Enter your serial number and search "filter". Then take a look at the hydrostatic system. There will be a box at the top that says "View Search Results Only". Check the box and only the parts descriptions with the word "filter" will show.

 

[laurencen]

guessing when you apply the brake the creep is prevented and the noise is the relief valve opening, creep is not enough to stall the motor

 

[uffda]

guessing when you apply the brake the creep is prevented and the noise is the relief valve opening, creep is not enough to stall the motor

Could there be something wrong with the relief valve? Should it be taken out and cleaned?

 

[brdgbldr]

Could there be something wrong with the relief valve? Should it be taken out and cleaned?

If there was something wrong with your relief valve you would probably hear the noise all the time under load.

The hydrostatic pump has a couple of relief valves. The springs can break or just wear out making them weak.