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Read articles →This is a real-time, hands-on front axle oil change on a Bad Boy 4025H at the 50-hour service mark, not a talking-head overview. The owner drains both sides with 17mm and 27mm plugs, measures out roughly a gallon and a half to a gallon and three-quarters of old fluid, refills with Valvoline 80W90, troubleshoots slow flow through the breather, and checks the dipstick. Best for owners doing this exact service themselves.
Appears to be an owner-operator documenting their own DIY maintenance, working through the process (including mistakes) in real time rather than presenting polished expertise.
The left side filler and drain plug is a 17mm, and the right side drain plug is a 27mm.
The maintenance manual calls for 90 weight, and the owner used Valvoline 80W90 as a close match.
Roughly a gallon and a half to a gallon and three quarters came out total, with about three quarters of a gallon from the right side alone.
The oil flows slowly through the axle, so the owner removed the bleeder valve on one side to fill the cylinder faster and avoid overflow.
