I have a Husqvarna yth2454 with hydrostat drive. My drive belt keeps coming off and it appears the transmission is tilted forward/down making the belt to come off the drive pulley to the top. the be

If your 1986 Cub Cadet Hydro 1210 is experiencing difficulty moving forward but works fine in reverse even after changing the transmission filter and fluid, there could be a few potential reasons for this issue. Here are some steps you can take to troubleshoot the problem:
1. **Check Drive Belt:** The drive belt is responsible for transferring power from the engine to the transmission. A worn or damaged drive belt can affect forward movement. Inspect the drive belt for any signs of wear, fraying, or damage. If the belt is in poor condition, consider replacing it.
2. **Check Tension of Drive Belt:** Ensure that the drive belt is properly tensioned. A loose drive belt can lead to slipping and difficulty in forward movement. Adjust the tension according to the manufacturer's specifications.
3. **Inspect Linkage and Connections:** Examine the linkage and connections between the control lever, transmission, and the drive system. Loose or misaligned linkage can result in improper engagement of gears, affecting forward movement.
4. **Hydrostatic Transmission Issues:** Since your Cub Cadet Hydro 1210 uses a hydrostatic transmission, there could be issues with the hydrostatic unit itself. Check for any signs of leaks, damaged hoses, or worn components in the hydrostatic transmission system.
5. **Transmission Oil Level and Quality:** Ensure that the transmission oil level is correct and that you're using the recommended type of oil. Poor-quality or incorrect transmission oil can lead to performance issues.
6. **Air in the Hydraulic System:** If there's air trapped in the hydraulic system, it can cause issues with the hydrostatic transmission. Bleed the hydraulic system to remove any air bubbles.
7. **Transmission Pulley and Sheaves:** Check the transmission pulley and sheaves for wear or damage. If these components are not functioning properly, they can affect the movement of the drive belt.
8. **Check for Obstructions:** Inspect the underside of the mower deck and the drive system for any debris, obstructions, or objects that might be interfering with the forward movement.
9. **Professional Inspection:** If none of the above steps resolve the issue, it might be a more complex problem requiring the expertise of a professional technician. They can perform a more in-depth diagnosis of the hydrostatic transmission system and identify any underlying issues.
Keep in mind that working with mechanical and hydraulic systems requires knowledge and expertise. If you're not comfortable performing these checks and repairs yourself, it's recommended to consult a qualified technician who has experience with Cub Cadet or similar equipment.

ever check the fluid level . they do not like air .

Check transmission drive belt and linkage from right foot pedal to transmission.

Have you checked the drive belt for transmission, 2 belts come off engine pulley, 1 for mower deck, the other for transmission

Which belt? The cutting deck belt or the belt which drives the mower?

Simply.no

Check to see if your drive belt has slipped off the pulley assembly, or if you have broken a pulley or the belt itself broke.

If the engine is running normally and the drive belt between the engine and the transmission is in good shape, most likely you have a failed hydrostatic transmission.

Assuming the engine is running and sounds good, you need to check the drive belt. With the engine OFF, make sure the topmost belt which goes from the engine to the top of the transmission is in place and snug. If it is there and in good shape, then I would suspect the hydrostatic transmission has failed. If the belt is not there, replace it; if it is loose, replace it. AGAIN DO NOT ATTEMPT TO PUT YOUR HANDS UP INSIDE A RUNNING MOWER.

husqvarna yth20k46
drive belt came off
fix
transmission boltes were not installed
replaced fix problem