Hydraulic Oil- dipstick/filler 204s/304

The filler/dipstick is on top of the tank under the seat towards the back. Some are combined filler dipsticks, some are separate, some do not have a dipstick. 

If you do not have a dipstick the oil needs to be about an inch below the top of the tank. On the top of the tank under the seat, towards the front is a triangular plate which when removed gives better access into the tank to check the oil level.

​The oil must be ISO 32, this is critical, anything else such as universal oil will cause the hydraulics to become sluggish.