Máy đào HuynDai R250 - P2.4

Shop manual máy đào HuynDai R250: An toan, cấu trúc, sơ đồ điện, thủy lực,

2-581. CONSTRUCTIONTravel device consists travel motor and gear box.Travel motor includes brake valve, parking brake and high/low speed changeover mechanism.GROUP 4 TRAVEL DEVICE(Up to #0472)P2Oil fill port(PF 1/2)Drain port(PF 1/2)ABD2D1P12 speed control port(P)D2D1P2P1P3PABPressure gauge port(P1~P2)Hi LowParking brake release gauge port(P3)Oil level check port(PF 1/2)P3PortABP1, P2P3D1, D2PPort nameMain portMain portGauge portGauge portDrain port2 speed control portPort sizeSAE 5000psi1"SAE 5000psi1"PT 1/4PT 1/8PF 1/2PF 1/425072TM01 2-59BASIC STRUCTURE1)Reduction gearHydraulic motorBrake valveParking brakeHigh/low speedchangeover mechanismControl valveHydraulic pump25072TM02 2-60STRUCTURE2)1 Hub2 Spindle3 Hold flange4 RV gear A5 RV gear B6 Input gear7 Spur gear8 Cover9 Crank shaft12 Spacer13 Distance piece15 Coupling17 Pin19 Hexagon socket bolt20 Snap ring21 Ball bearing22 Taper roller bearing106 Shoe107 Retainer plate108 Thrust ball109 Timing plate110 Washer111 Washer112 Piston113 Spring114 Spring115 Firction plate116 Mating plate132 Oil seal135 O-ring139 O-ring145 Snap ring149 Ball bearing150 Ball bearing23 Needle roller bearing25 Snap ring27 O-ring29 O-ring30 O-ring31 Floating seal33 Plug34 Parallel pin35 Hexagon socket bolt36 Steel ball37 Washer42 Parallel pin43 O-ring102 Shaft103 Swash plate104 Cylinder block105 Piston383139135113109150399341301357355366363145114110 398 397 151 104 111 108 105 10[...]... 233 2-6 8-3 29 39 114 104 115 116 110 105 151 107 108 106 103 162 Parallel pin O-ring Pin Name plate Rivet screw Rear flange Seat valve Valve Spring Plug Ring Main spool Plug Plug Valve Spring Spring O-ring 234 238 241 242 244 252 253 263 265 266 267 268 272 275 276 279 282 294 O-ring O-ring Parallel pin Reducing Valve Plug Plug Plug Spool O-ring Spring Set screw Steel ball Valve seat Spring Ring O-ring... Floating seal Parallel pin O-ring Plug Hexagon bolt Spring washer Parallel pin Hexagon socket bolt Steel ball O-ring O-ring Shaft Swash plate Cylinder block Piston Shoe Retainer plate 295 296 298 108 109 110 112 113 114 115 116 132 139 145 149 150 151 161 162 163 167 2507ATM03 272 Thrust ball Timing plate Washer Piston Spring Spring Friction plate Mating plate Oil seal O-ring Snap ring Ball bearing... port Main port SAE 5000psi 1" P1~P4 Gauge port PF 1/4 C1~C2 Drain port PF 1/2 2 speed control port PF 1/4 D AB 2507A2TM01 2-6 8-1 1) BASIC STRUCTURE Reduction gear Hydraulic motor Brake valve Parking brake High/low speed changover mechanism Control valve Hydraulic pump 2507A2TM02 2-6 8-2 2) STRUCTURE 282 181 224 279 228 223 102 109 113 139 178 112 201 227 230 234 226 221 238 2 26 40 23 1 24 12 8 15 35 5... the axis of drive shaft(102) Redial component(F3) generates respective torques(T = F3 ri) for Y1-Y2 This residual of torque(T = F3 ri) rotates cylinder block(104) via piston(105) Cylinder block(104) is spline-coupled with drive shaft(102) So the drive shaft(102) rotates and the torque is transmitted 2-6 8-4 (2) Brake valve Brake released(Starting / Running) When the pressurized oil supplied from port... Number of RV gear teeth i2 = 2 22 23 24 1 2 360 24 3 3 4 5 22 23 24 1 2 3 4 Total gear ratio of this reduction gear is described as the following i = i1・i2 = - Zi (Zp-ZR) ・ Zs Zp Crank shaft half revolution Crank shaft one revolution 25072TM12 2-6 8 GROUP 4 TRAVEL DEVICE(#0473 and up) 1 CONSTRUCTION Travel device consists travel motor and gear box Travel motor includes brake valve, parking brake and... This pressure slides plunger[302] to the right to short-circuit port(D) and (C), which prevents pressure rise and cavitation Valve(227) is activated by a slight negative pressure to open the oil negative passage between the oil line at port(A) side and port(C) at the suction side of motor, thus preventing cavitation of the hydraulic motor 2-6 8-6 112 C 302 p a b D 223 298 295 228 227 B A 2507A2TM06... (483N m) to the hydraulic motor shaft Note that oil control through a proper oil passage ensures smooth operation 113 112 115 116 a 2507A2TM07 113 112 115 116 a 2507A2TM08 2-6 8-7 (4) High/low speed changeover mechanism At low speed - At pilot pressure of less than 15kgf/cm2(1.47Mpa) A 103 263 266 Spindle B Spring Motor case C 2507A2TM09 When the pilot pressure is supplied from port £ (at a pressure of... plate(103) until it touches side ¤˛of the spindle At this time, swash plate(103) is tilted at a minimum angle( 2) and the piston displacement of hydraulic motor becomes minimum, thus leading to high-speed operation 2-6 8-8 2) REDUCTION GEAR (1) Function The reduction gear unit consists of combination of simple planetary gear mechanism and differential gear mechanism This mechanism reduce the high speed rotation... brake.) When the pressurized oil is supplied from port , spool(223) and valve(227) move reversely and the hydraulic motor also rotates reversely 112 C D p a b 223 298 295 228 227 B A Drain 2507A2TM05 2-6 8-5 Brake applied(Stopping / Stalling) When the pressurized oil supplied from port(A) is stopped during traveling, no hydraulic pressure is applied and spool(223) which has slided to the left will return... 218 A 3 A A 199 200 36 219 252 7 30 268 20 220 244 13 297 233 168 SECTION A-A 167 222 132 242 149 275 163 145 311 310 306 304 303 309 308 305 307 302 301 1 2 3 4 5 6 7 8 9 12 13 14 15 17 19 20 23 24 Hub Spindle Carrier Ring gear A Ring gear B Cluster gear Sun gear Coupling gear Cluster shaft Distance piece Cover Thrust collar O-ring Pin Coupling Thrust plate Seal ring Ball bearing 25 26 27 29 30 31 33 . plate1 144 0262178139226221 252 244 2682971 23 241 28153552519 643 233 143 4937302013361727167132 149 1631611131121092652 642 66263150 241 218199200219220233222 242 145 27527227629391 041 151161101051511071081061031623063 043 033093083053073013103112821812 242 792282232272302 342 38102201298296295294AAA168302SECTION. (Zp-ZR)i = i1・i2 = - ・Zs Zp 3602 x 244 3RV gear A or B2223 241 234Crank shaftPinHub1232223 241 2 543 2223 241 236024Crank shafthalf revolution