This is a must-have for any mechanic. This app provides a complete hydraulic troubleshooting guide, hydraulic calculators, bolt torque guide and drill bit tap sizing chart. Whether you are working on multi-million dollar equipment or simply a log splitter, this is the ultimate guide for navigating and troubleshooting any hydraulic system. As a bonus we have added a bolt torque chart and a drill bit tap sizing chart. Never again will you have to ask how tight should this bolt be and when repairing a stripped bolt you will know exactly what size drill bit will be required to make sure your tapped hole has full thread engagement. All this provided at no charge from your friends at Orings & Things. Your one stop shop for all your hydraulic seal needs. www.oringsandthings.com