Hi all, just joined and first post. We acquired a 540 skidder with a ruptured hyd oil cooler, so repaired it and now trying to flush and top up the hydraulic system. We bought a TM1003 pdf service manual online but can't figure out the sump location or access and how to fill it and check level. Someone suggested the sump is the transmission case, and likely need to drain the case and refill from the top. Can anyone describe a procedure to drain, refill and check the level of the hydraulic sump on this 540 line skidder, and thanks for your time.