I noticed a difference between the transmissions on the X1120 and on the X900, X1100 and X1140. The cylinder at the top rear of the transmission housing on the X1120 is a different shape and has an external pipe connected to the end of it. I first saw the difference at the local dealer, and confirmed it in the parts listings. The parts diagrams show a different internal configuration. The X1120 unit appears to be simply a piston in a cylinder while the X900, X1100 and X1140 units appear to have several springs acting on a piston in a cylinder. In both cases the piston appears to act on the swash plate.
I think I've figured out the reason for the difference. The top speed for the X1120 is rated at 29 mph while the X900, X1100 and X1140 are rated at 25 mph. Inside the cylinder at the rear of the transmission is the piston which controls the swash plate of the hydraulic motor which powers the wheels. The motor swash plate position along with the pump swash plate position determines the output speed of the transmission. It appears, based on the parts listings, that the motor other than the control piston, pump, regulator and charge pump are identical for all the X models. Also identical are the transmission gears and the ring and pinion in the rear axle. So my guess is the difference in the motor control piston of the X1120 is to enable the higher top speed.
I think I've figured out the reason for the difference. The top speed for the X1120 is rated at 29 mph while the X900, X1100 and X1140 are rated at 25 mph. Inside the cylinder at the rear of the transmission is the piston which controls the swash plate of the hydraulic motor which powers the wheels. The motor swash plate position along with the pump swash plate position determines the output speed of the transmission. It appears, based on the parts listings, that the motor other than the control piston, pump, regulator and charge pump are identical for all the X models. Also identical are the transmission gears and the ring and pinion in the rear axle. So my guess is the difference in the motor control piston of the X1120 is to enable the higher top speed.
Transmission: X1120 vs X900/X1100/X1140
0 commentaires:
Enregistrer un commentaire