Pilot Control Spring Mod

MattB4 · Jun 27, 2025

Installed the pilot spring mod to my TT-17. Bit of a guess how to get the boot off and on the left hand joystick I took off the plastic top of control cover (2 side Phillips screws, a 10mm bolt hidden under armrest stem and disconnect wires.) to find out I could simply pop the rubber boot off to get at the control plungers to add springs. Helped though for stretch fitting boot back on the base.

The right hand joystick I just worked the base of the boot off in the arm recess and added springs before working to stretch it back on. Not sure if I got it perfect but I will find out. Tight quarters in this cab unit.

Jay Flay · Jun 27, 2025

MattB4 said:
Installed the pilot spring mod to my TT-17. Bit of a guess how to get the boot off and on the left hand joystick I took off the plastic top of control cover (2 side Phillips screws, a 10mm bolt hidden under armrest stem and disconnect wires.) to find out I could simply pop the rubber boot off to get at the control plungers to add springs. Helped though for stretch fitting boot back on the base.

The right hand joystick I just worked the base of the boot off in the arm recess and added springs before working to stretch it back on. Not sure if I got it perfect but I will find out. Tight quarters in this cab unit.

Thanks for this update @MattB4 ! I have noticed that the majority of installs are around 5-15 minutes. Mine (AGT KU18e) was a bit more involved and probably took me 20 minutes or so. Nothing special needed as far as tools go. Looking forward to your thoughts after taking the kit for a spin.