Recently purchased an 1878 hours B7300 with backhoe, loader etc. Front seal leaking like a sieve at the sprial bevel pinion shaft into differential. Drained the front axle case and it looked like nestle chocolate milk, damn. Filled up UDT and the leak became apparent. Read a post on tightening the pivot bolt, will take a look but assume the seals are as beat up as the bucket. References to good sources / manuals / youtube videos greatly appreciated thank you