4 - 34 Genie TZ-50 Part No. 824982September 2014Section 4 • Repair Procedures8-3Drive Manifold Components (if equipped)The drive manifold is located next to the function manifold.Index SchematicNo. Description Item Function Torque— Coil nut (items BI, BK, BL, BN and BO) .................................................................................... 4-5 ft-lbs / 7-9 Nm1 Differential sensing valve .................... BA ....... Maintains traction equal to BJ ............. 25-27 ft-lbs / 34-36 Nm2 Orifice - plug, 0.090 inch / 2.3 mm ....... BB ....... Drive circuit3 Differential sensing valve .................... BC ....... Maintains torque while driving ............ 25-27 ft-lbs / 34-36 Nm4 Orifice - plug, 0.090 inch / 2.3 mm ....... BD ....... Pump 2 circuit— Port plug ....................................................................................................................... 97-117 in-lbs / 11-13 Nm5 Counterbalance valve ......................... BE ....... Drive circuit, left side ........................... 30-35 ft-lbs / 41-47 Nm6 Differential sensing valve .................... BF ....... Returns pump 2 hydraulic fluidto tank when not driving ...................... 25-27 ft-lbs / 34-36 Nm7 Counterbalance valve ......................... BG ....... Drive circuit, right side ......................... 25-30 ft-lbs / 34-41 Nm8 Shuttle valve, 2 position 3 way ............ BH ....... Drive circuit ..................................................... 4-5 ft-lbs / 6 Nm9 Solenoid valve, 2 position 2 way .......... BI ........ Brake release ...................................... 18-20 ft-lbs / 25-27 Nm10 Differential sensing valve ..................... BJ ....... Maintains traction equal to BA ............ 25-27 ft-lbs / 34-36 Nm11 Proportional valve, 2 position 2 way ... BK ....... Drive circuit, right side ......................... 18-20 ft-lbs / 25-27 Nm12 Solenoid valve, 2 position 4 way ......... BL ....... Drive circuit, right side ......................... 18-20 ft-lbs / 25-27 Nm13 Check valve, 10 psi / 0.7 bar ............... BM ....... Pump 2 circuit ...................................... 18-20 ft-lbs / 25-27 Nm14 Solenoid valve, 2 position 4 way ......... BN ....... Drive circuit, left side ........................... 18-20 ft-lbs / 25-27 Nm15 Proportional valve, 2 position 2 way ... BO ....... Drive circuit, left side ........................... 18-20 ft-lbs / 25-27 NmMANIFOLDS