TW125 in feed roller issue

[Gordon S]

Hi all,

 

I have a Timberwolf TW125 and am struggling with an issue.

 

The in feed rollers started to pause for a long time (5-10 seconds) while the stress control took over. It would then start to take material again.

 

Now the rollers start to roll once the machine is started but immediately stop once material is fed. The engine sounds fine and the revs are high. The switches work but it feels like rollers lack power/force to feed. 

 

If anyone has any ideas of where to start it would be appreciated.

 

many thanks

 

Gordon

[Mick Dempsey]

Belts sound loose. 

[Mark Bolam]

Just about to say have you checked the belt tension?

Mick beat me to it.

[Gordon S]

20 minutes ago, Mick Dempsey said:

Belts sound loose. 

Thanks for the replies,

 

I did give them a ping test a couple of days ago and they seemed tight but I'll go back and check properly.

[Mick Dempsey]

36 minutes ago, Gordon S said:

Thanks for the replies,

 

I did give them a ping test a couple of days ago and they seemed tight but I'll go back and check properly.

Ok then, maybe not.

[ABtrees]

On 16/06/2025 at 18:11, Gordon S said:

Thanks for the replies,

 

I did give them a ping test a couple of days ago and they seemed tight but I'll go back and check properly.

 

'Ping test .....'

 

I was having this exact same problem on a TW125.  Spoke to a thoroughly helpful chap (on the TW stand at the Arbshow) whose rule of thumb advice was to try to turn each belt (at the mid point) through 90 degrees.  You should only just be able to do this = roughly the right tension  !

 

Worked a treat for mine - they were a bit loose - tightened them up and now working fine again. Good luck.

AB

[Conner]

Had something similar on a 150. The splines had worn in the roller coupling. Turned due to friction when not loaded but stopped when loaded. Took a little bit of finding. 

[GA Groundcare]

47 minutes ago, Conner said:

Had something similar on a 150. The splines had worn in the roller coupling. Turned due to friction when not loaded but stopped when loaded. Took a little bit of finding. 

You would only get one roller stopping unless both splines were shot at the same time. Quite common those splines going, largely the reason they moved to replaceable couplings. As you say, can take a bit of finding the first time. Next time you know where to dive into straight away

 

Edited 22 hours ago by GA Groundcare

[GA Groundcare]

On 16/06/2025 at 17:43, Gordon S said:

Hi all,

 

I have a Timberwolf TW125 and am struggling with an issue.

 

The in feed rollers started to pause for a long time (5-10 seconds) while the stress control took over. It would then start to take material again.

 

Now the rollers start to roll once the machine is started but immediately stop once material is fed. The engine sounds fine and the revs are high. The switches work but it feels like rollers lack power/force to feed. 

 

If anyone has any ideas of where to start it would be appreciated.

 

many thanks

 

Gordon

 

Sounds like the O rings have failed on the pressure relief valve. Locate your hydraulic valve block with the solenoid coils and remove the PRV. Think its like a 22mm spanner from memory.

 

Also, get a volt meter and check to see if you still have 12v on the forward hirchsmann plug when the rollers are stopping.

 

As others have said, check your drive belts. Both flywheel and hydraulic pump. The hydraulic pump belt on the old TW125 are quite fiddly to tension.