cat 259d speed sensor

[phil smith]

how do you replace speed sensor on a cat 259d

 

[Tyler d4c]

Nuts and bolts and wires

 

[Nige]

how do you replace speed sensor on a cat 259d

There is a metal tag with one bolt (#3) that holds the sensor (#1) in place. If it has never been out before it will most likely be pretty tight.

Question is, why do you want to replace the sensor.?

 

[phil smith]

code 2688-8 right drive motor speed sensor #2 adnormal frequency, pulse width or period comes up. I switched the wires from the left and right and it changed to 2687-8 right #1 its a 2022 model

 

[Nige]

I switched the wires from the left and right and it changed to 2687-8 right #1

If you switched the wires from left to right then the 2688-8 (RH #2) should have changed to 2686-8 (LH #2 sensor). You did interchange the complete 4-wire harness from left to right and vice versa, correct.?

 

[phil smith]

If you switched the wires from left to right then the 2688-8 (RH #2) should have changed to 2686-8 (LH #2 sensor). You did interchange the complete 4-wire harness from left to right and vice versa, correct.?

yes

 

[Nige]

Something doesn't make sense to me but if you are convinced it's a sensor then crack on.

 

[phil smith]

Something doesn't make sense to me but if you are convinced it's a sensor then crack on.

I am not convinced just not sure where else to go

 

[Nige]

Here's the troubeshooting procedure for 2688-8. Try that and see where it gets you.

 

[Tom3697]

Replacing the speed sensor on your Cat 259D is quite straightforward. That metal tag you mentioned, secured with a single bolt, holds the sensor in place. Even if you're unsure about it, trust me, it's definitely the speed sensor.

Here's what you need to do:
Find the speed sensor, usually mounted on the transmission on wheel hub. Disconnect the electrical connector from the sensor. Remove the single bolt holding the sensor in place. Gently pull out the old sensor from its housing. Put the new sensor in, making sure it's aligned correctly, and tighten the bolt. Reconnect the electrical connector. Test the sensor to make sure it's working properly.