Park the self loading concrete mixer on a horizontal surface and tighten the handbrake.
Let the engine idle for a few minutes.
Press the brake pedal, turn the lever to reverse, forward, etc., and stay in each gear for a few seconds to fill the torque converter and all shift actuators with hydraulic oil, and finally turn the control lever to the parking position.
Remove the automatic transmission dipstick from the filler tube, insert the cleaned dipstick into the filler tube and pull it out to check the oil level on the dipstick.
Please check the oil level and oil quality of the gearbox before checking or eliminating the shortcomings of the self loading concrete mixer. Place the shift lever in the P position, operate the engine at idle for at least a few minutes, the oil reaches the normal operating temperature, and the vehicle is parked on a horizontal surface to ensure the oil level between the differential and the throttle. Transmission is usually secure.