Most likely, the clutch master cylinder has failed. Usually, a clutch slave cylinder will leak. Try pumping the clutch several times to see if that makes a difference. If it does, replace the clutch master cylinder. Here are the directions for replacing the component. By the way, since it shifts normally with the engine off, the linkage is most likely fine. The attached pictures correlate with the directions.
Clutch Master Cylinder Replacement
Use fender covers to avoid damaging painted surfaces.
Do not spill brake fluid on the vehicle; it may damage the paint. If brake fluid does contact the paint, wash it off immediately with water.
1. Remove the brake fluid from the clutch master cylinder reservoir with a syringe.
2. Remove the retaining clip (A). Disconnect the clutch line (B). Plug or wrap the end of the clutch line with a shop towel to prevent brake fluid from coming out.
3. Disconnect the reservoir hose (C) from the clutch master cylinder. Plug or wrap the end of the reservoir hose with a shop towel to prevent brake fluid from coming out.
4. Pry out the lock pin (A), and pull the pedal pin (B) out of the yoke. Remove the master cylinder mounting nuts (C).
5. Remove the clutch master cylinder (A).
6. Remove the O-ring (B) and the clutch master cylinder seal (C) from the clutch master cylinder.
7. Install the clutch master cylinder seal (A), clutch master cylinder (B), and a new O-ring (C).
8. Install the pedal pin (A) and the lock pin (B), then tighten the master cylinder mounting nuts (C).
9. Connect the reservoir hose (A) and the clutch line (B). Make sure the tabs (C) on the reservoir hose clamp is pointed in the directions shown.
10. Install the retaining clip (A), and pry to open the tip of the retaining clip (B) with a screwdriver to prevent it from coming off.
11. Bleed the clutch master hydraulic system.
12. Make sure the fluid level in the reservoir is at the Max (upper) level line.
13. Check the clutch operation and check for leaking fluid.
14. Adjust the clutch pedal, clutch pedal position switch, and clutch interlock switch.
15. Test-drive the vehicle.
Let me know if you have questions or need help.
Images (Click to enlarge)
Wednesday, May 29th, 2019 AT 8:21 PM