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Read articles →This is a hands-on install of a Jailbreak Your Tractor hydraulic shim kit on an L3130, not a review or dealer pitch. The owner unboxes the four-shim kit and gauge, tests baseline lift-circuit pressure at idle and 3000 RPM, pulls the relief valve block, adds three shims, and re-tests, showing a clear before/after pressure jump. Good for L-series owners considering this specific hydraulic-pressure mod.
An owner-operator documenting a DIY modification on his own Kubota L3130, sharing real-time results rather than a polished tutorial.
Before, idle pressure was just over 2250 and maxed out around 3000 RPM. After adding three shims, idle pressure reached what previously required full RPM, a major improvement.
The owner paid $129 for the four-shim kit, which included a pressure gauge and reference sheets for different Kubota model series.
A 22mm socket was used, swapped to a deep socket with an extension because the shallow socket would not reach.
The owner notes the tractor's age and hose condition could mean more hoses need replacing, though recently rebuilt cylinders have new hoses already.
