Cat 252b3 squealing

[Nige]

Sorry to ask but you never mentioned the level. Symptoms indicate possibly sucking air in the pump inlet. There is a large diameter hose from the base of the hydraulic tank to the pump (marked 12 in the diagram) secured by a hose clamp at each end. Are the clamps tight..? You will most likely need the cab up to gain access to this hose.

 

[Jimww]

Can the machine be started with the cab up?

 

[caterpillarmech]

You can start it normally and then raise the cab.

 

[Nige]

Please be VERY careful if running the machine with the cab up. I got word of a fatal accident on a skid steer only this week where a mechanic who was testing a machine with the engine running and the cab up caught his coveralls on a control lever and the hydraulic movement crushed him.

 

[ol' Grump]

Belt dressing seems to help a bit on old belts. .for a while.

 

[Oxbow]

Belt dressing seems to help a bit on old belts. .for a while.

Thanks.

 

[Nige]

I'm sure the subject of belt tension/condition was brought up before but I don't think the OP ever replied to say if it had been checked or not.

 

[Jimww]

I start up the machine it squeals until hydraulic pressure builds up then it stop until I start to drive it and only when driving not when using arms and bucket. Is this normal ??

 

[Nige]

Hydraulic pressure should be up within 1-2 seconds of starting the engine. Is this how long the noise lasts for when you first start up..? If the noise was related to the hydraulic system I would expect it to make the noise both travelling and also when using the bucket functions.

 

[Jimww]

No noise when using bucket

 

[Jimww]

Only makes noise 2 to 3 second when you start it and when you start to drive then stops when you stop

 

[Jimww]

Does any know anything about theses machines two they have to separate pumps to the bucket and to the drive ??