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I have a d9g that wont allow me to engage any gears, the…

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hello I have a d9g...
hello I have a d9g that wont allow me to engage any gears, the gear box is full of oil, usual operator not available but sure it was parked without a problem only a few days ago and was wondering if there is a trick to this or a linkage or something I might have to manually operate to release safety valve or similar any advice would be greatly appreciated, thanks mik
Submitted: 2 years ago.Category: Construction and Road Equipment
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Answered in 7 hours by:
2/27/2016
Mechanic: catmastertech, Technician replied 2 years ago
catmastertech
catmastertech, Technician
Category: Construction and Road Equipment
Satisfied Customers: 2,578
Experience: Field service technician for CAT 19 years.
Verified

Hello,

Please post the full tractor serial number with your reply.

When you checked the "gear box", do mean the rear "bevel gear" compartment?

Did you check the transmission oil level too?

Or do you mean this a Direct Drive "manual" transmission and not a Powershift transmission?

If it is direct drive, is the clutch lever locking into position?

If this is a powershift, is the drive shaft turning?

The only trick to a powershift is to verify the linkage s going to neutral or the internal "safety valve" will not allow you to select a gear.

If the linkage is selecting neutral and all three speed, the problem could be inside the control valve is stuck.

No external release is on the transmission or the control valve.

The only thing left is the brake lock. It appears you have already checked for this issue but, I just want to verify you have seen the brake control rods are moving at the steering clutch housings and not just that the pedals are moving.

Beyond looking at these items, pressure testing is needed to see if the transmission pump is working and the pressures are correct to the transmission and torque converter.

Please provide as much detail as you can about these checks and I will be glad to help you as much as I can.

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