2013 Liugong clg856 wheel loader. Gear shifting issues.

[ador]

Forward /Reverse 100%working good.the problem is when I turn the gear shift switch to 2nd,3rd and 4th not functioning.there's current 24V from switch to TCM.but no current output from tcm going to shift solinoid valve..can you please share your experience about this problem? How about a shift solinoid wiring diagram,can you share it to me please?thank U so much.

 

[Bigbert]

Hi Ador,

the transmission is a 4WG200? EST25 TCM?
Loader moves in auto mode? Not in position 2nd, 3rd, 4th?

 

[ador]

Transmission serial number

 

[ador]

Transmission serial numberView attachment 333005

 

[ador]

TCM

 

[ador]

Yes, it moves on reverse/forward auto mode.but in 2nd,3rd a d 4th gear no response.i removed the solinoid valve cover and check the solinoid valve 1x1 by energizing it with 24V supply,I heard a strong click sound.does it mean solinoid valves are OK?

 

[Bigbert]

Ador, so it seems transmission is mechanically and hydraulically fine. I'd assume the issue is gear switch. DW2 or DW3? Basically same apart from reinforced design.
I'll share a manual with some info in PN.

 

[ador]

Hello, sir Bigbert.thank U so much for sharing two manuals.english and German version.though I can't understand the German version,but I will use the Google lens/ translate so that I can read it.i will update/ message you if what will be the result.thank U so much.

 

[ador]

Hi,Bigbert.i checked the signal from shift switch, there's 24V supply going to tcm.but no power output from tcm to shift solinoid.how much voltage from tcm should these valves need to open?

 

[Bigbert]

Ador, see page 85 "DW2" diagram: A2 is gear switch. Your gear switch looks like page 89, right?
The AD 1...7 need to give 24 V signals to TCM, according to pattern shown page 89. Pin 2 (ED1) needs a 24 V from main harness. TCM getting a separate 24 V from main harness.
The solenoids need 24 V, too, from TCM.
But check signals from gear switch. Gear switch divides the 24 V (ED1) to various AD's.