Parts list: № Number Qty Name Options 1 R39741 1 Drain Plug 2 U13639 2 O-Ring 3 R40272 1 SPRING 4 AT58487 1 THERMOSTAT (160°F) (71°C) 5 [] 1 (T72098 NLA) 6 [] 1 (T60968 NLA) 7 Y1481B 1 Spring PRESSURE 8 R39741 1 Drain Plug 9 AT66748 1 Pressure Relief Valve Next page: ST300278 Transmission / Hydrostatic Diagnostic Plumbing ST300275 Hydrostatic Pump Displacement Control Valve ST300274 Hydrostatic Pump Charging System and Filtration Manifold ST300273 Hydrostatic Charge Housing ST300272 Hydrostatic Pump Limitation Control ST300271 Hydrostatic Pump Housing, Swashplate, Piston and Cylinder Block Assembly