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Read articles →An owner-operator walking through his own first 50-hour service on a Yanmar SA425, this video is notable for its real-dollar numbers ($450 total using all OEM parts and fluid) and honest problem-solving, including a kit labeling mismatch and a skipped filter swap when the right part wasn't confirmed. Covers oil, hydraulic fluid, air filter, fuel filter, grease points, belt check, and fuel-water separator. Best for SA425 owners about to do the same service.
An owner-operator sharing hands-on experience maintaining his own tractor on a 6-acre property, with no apparent commercial or dealer affiliation.
About $220 for the maintenance kit and $225 to $230 for hydraulic fluid, totaling around $450 using all Yanmar authentic parts and fluids.
About 4.1 gallons, filled until the fluid level sits halfway up the sight glass, checked after running the hydraulics forward and back.
No, it only needs to be drained after 50 hours and replaced at 100 hours. The owner skipped replacement because the kit filter did not match.
Push against the belt and check for about a half inch of deflection when tension is applied.
