How do I check the hydraulic fluid on my T5d (T7) when the guage is broken? I just bought the machine and knew the guage was bad but didn't ask the PO about it since it was his fathers and he said he didn't know much about it. I figured it had a dipstick like the T5c that I had ran before. How does the guage come off does it just unscrew? I don't want to risk hurting the pump by running it without checking levels first.