I have a Yale forklift (1998) GLC 050 serial #E187V03031U that I purchased recently. I want to change fluids , but I've been unable to determine which type of hydraulic fluid is required in the lift and also the transmission. I've spoken to three different dealers and gotten three different answers. Can anyone clarify from that serial number what type of hydraulic fluid should be used in the transmission (and in the lift) and approximately how much fluid is used in a full hydraulic fluid servicing?. It does have a spin on oil filter for the transmission. (I was asked that question by a previous dealer). Thanks in advance.