Transmission pressure light issue

[toothandclaw88]

I keep seeing the transmission pressure light on on my JCB 220T. The fluid looks good and is full and it shifts fine without any slipping.
any ideas what might be going on? Thanks everyone

 

[dust-free_mojo]

I keep seeing the transmission pressure light on on my JCB 220T. The fluid looks good and is full and it shifts fine without any slipping.
any ideas what might be going on? Thanks everyone

Most likely, it's either a faulty sensor or a wiring issue to that sensor. I'd start by checking the wiring for any damage, then consider swapping the sensor if that looks fine.

 

[oldmacjohn75]

What about the filter and the pickup screen? If they're clogged you'll get the light warning

 

[FamilyGuy]

It might just be a bad sensor or if not, then it's a clogged filter messing with the reading. Even if it shifts fine, that light means that something is wrong in the pressure reading circuit. Go check the pickup screen and swap the sensor if the wiring checks out.

 

[sanitrix_]

Does the light turn on when you hit certain RPMs or when the load's at a specific point?

 

[k00l-aid]

Had the same issue on my 2018 JCB 220T last season. Turned out to be a faulty pressure sensor near the top of the transmission. Swapped it out and the warning disappeared. Check the sensor before diving into anything bigger.

 

[MandRaith]

On a machine like a JCB 220T, a transmission pressure warning light that comes on when the engine is off but goes away when it's running is a very specific type of diagnostic signal. It's often not a major mechanical problem, but rather an electrical one. Since your machine is working fine, the best and most logical first step is to focus on the electrical side of the problem. A new pressure switch is a relatively cheap part, and it's the most likely culprit. If that doesn't fix it, then you can move on to checking the wiring and, as a last resort, the internals of the transmission.

 

[dykeens]

On a machine like a JCB 220T, a transmission pressure warning light that comes on when the engine is off but goes away when it's running is a very specific type of diagnostic signal. It's often not a major mechanical problem, but rather an electrical one. Since your machine is working fine, the best and most logical first step is to focus on the electrical side of the problem. A new pressure switch is a relatively cheap part, and it's the most likely culprit. If that doesn't fix it, then you can move on to checking the wiring and, as a last resort, the internals of the transmission.

Appreciate the insight! I'm helping my cousin troubleshoot his 220T and we noticed that warning light too and were worried it meant a big fix. Good to know it's likely electrical. Is swapping the pressure switch something we can do without pulling the cab? And when checking wiring, are there common spots where it tends to wear or short out?