After readjusting the primary chain, the gear rod may need re-setting. Loosen the lock nut at the bottom end of the rod and detach the top joint of the gear rod. Readjust the bottom joint by screwing it up or down as may be needed until with the outside striking lever on the gearbox in 2nd speed position the gear lever fits snugly into the 2nd gear position in the gate on the tank.