Instalation manuals can be downloaded from here:

This kit replaces the original motor with a high quality coreless motor offering improved low speed control. Can be fitted to the following models using the X7098, X7412, X7420, X7535 and X7796 motors.

• Class A1X

• Terrier

• Rocket

• Ruston Hornsby Diesel Shunter 48DS and 88DS

• 4WDH Sentinel

The following loco part numbers are covered by this kit:

R3427, R3428, R3429, R3550, R3615, R3640, R3693, R3693X, R3694, R3694X, R3695, R3695X, R3704, R3705, R3706, R3707, R3767, R3767X, R3768, R3768X, R3780, R3780X, R3781, R3781X, R3782, R3782X, R3783, R3783X, R3809, R3810, R3811, R3811X, R3812, R3812X, R3852, R3853, R3894, R3895, R3896, R3897, R3943, R30012, R30013, R30083, R30084, R30085, R30122

Replaces the following motors: X803, X1385, X8438