OPERATION DETAILED CONTROLS AND GAUGES 4. Hold the top grip with your right hand, pull it to the front to remove the top of the front window from the frame, then set it on the rail of the top roller. 5. From the inside of the operator's cab, hold the bottom grip with the left hand and the top grip with right hand, pull up the upper windshield, and push it in fully until it is locked by catch (C). 6. Lock securely with lock pins (A) at the left and right sides. 3-19