Cub Cadet G730- Manuals

G730 3 HYDRAULIC SCHEMATIC Figure 1, Hydraulic Schematic With Charge Pump Vent Bypass Motor Shaft Motor Pump Filter Charge Pump Charge Relief System Check Valves Input Shaft Case Reservoir

4 G730 EXTERNAL FEATURES G730 ® — Top View — — Bottom View — Return To Neutral Assembly Axle Shaft Side Housing Brake Assembly Brake Arm Filter Guard Bypass Arm Main Housing Charge Pump

6 G730 HYDRO-GEAR 7 186 H3 476 Assembled in USA Year Built G7-BCEE-1X7B-1XCX G7-BCEE-1X7B-1XCX BOM Model Number Date (Julian- Day of year) Serial Number (unique for that model - for that day) Type of Product and Build Information Sales Drawing Number Figure 2, Configuration Label PRODUCT IDENTIFICAT...

G730 This symbol points out important safety instructions which, if not followed, could en- danger the personal safety and/or property of yourself and others. Read and follow all instruc- tions in this manual before attempting mainte- nance on your transaxle. When you see this symbol - HEED ITS WARN...

8 G730 T R O U B L E S H O O T I N G C H E C K L I S T P o s s i b l e C a u s e C o r r e c t i v e A c t i o n U n i t O p e r a t e s I n O n e D i r e c t i o n O n l y Control linkage bent or out of adjustment Repair or replace linkage, Page 9 Drive belt slipping or pulley damaged Repair or rep...

G730 9 Typically, an engine oil with a minimum rating of 9.0 cSt (55 SUS) at 230° F (110° C) and an API classification of SL is recommended. A 20W50 engine oil has been selected for use by the factory and is recommended for normal operating procedures. Fluid Volume and Level Fluid volume information...

10 G730 191 12 190 FILTER AND FILTER GUARD Refer to Figure 3 Disassembly 1. Remove the hex head screws (105), and filter guard (106). 2. Remove the filter (23) and discard. NOTE: Always replace the filter when preform- ing any internal maintenance to the transaxle. Inspection 1. Inspect all parts fo...

G730 11 This transaxle is designed with an external filter for ease of maintenance. To ensure constant fluid quality levels and longer life, an initial oil and filter change at 75-100 hours, then every 400 hours thereafter is recommended.The following procedure can be performed with the transaxle in...

12 G730 PURGING PROCEDURES Due to the effects air has on efficiency in hy - drostatic drive applications, it is critical that it is purged from the system. Air creates inefficiency because its compres - sion and expansion rate is higher than that of the oil approved for use in hydrostatic drive syst...

G730 13 WARNING Do not attempt any servicing or ad- justments with the engine running. Use extreme caution while inspecting the drive belt assembly and all vehicle linkage!Follow all safety procedures outlined in the vehicle owner’s manual. WARNING POTENTIAL FOR SERIOUS INJURY Inattention to proper ...

14 G730 Refer to Figure 6 Disassembly 1. Remove the RTN control arm kit by first removing the spring (147) and Torx head screw (46). The remaining members of the assembly can be removed as a single item – washer (146), unidirectional scissor arm kit (145), and the control arm (44). 2. Remove the All...

G730 15 RETURN TO NEUTRAL/ROS ASSEMBLY Refer to Figure 7 Disassembly 1. Remove all items previously discussed in their recommended order. 2. Remove the spring (147).3. Remove the Torx head screw (46), discard, and the washer (146). 4. Remove the scissor arm (145), and the RTN control arm (44). 5. Re...

16 G730 CONTROL ARM ASSEMBLY Refer to Figure 8 Disassembly 1. Remove the lock nut (47), the washer (45) and the Torx head screw (46). 2. Remove the control arm (44), the washers (48) and the stud (42). NOTE: Only remove the seal (41) if damaged or worn. The seal cannot be serviced separately. Refer ...

G730 17 BRAKE ARM & BRAKE ASSEMBLY Figure 9, Brake Assembly Refer to Figure 9 Disassembly 1. Remove the cotter pin (182) and discard. Mark the orientation of the bias spring (185), and long screw (176). Remove the bias spring (185), the castle nut (181), and the washer (184). 2. Remove the brake...

18 G730 Figure 10, Brake Setting Refer to Figures 9 and 10 BRAKE SETTING 1. Remove the brake arm bias spring (185), the cotter pin (182) and loosen the brake castle nut (181). Refer to figure 8. 2. Insert a 0.015” feeler gage between the brake rotor (171) and top brake puck, and then set the brake b...

G730 19 TEAR DOWN AND REASSEMBLYHow to Use This Manual Each subassembly illustrated in this manual is illustrated with an exploded view showing the parts involved. The item reference numbers in each illustration are for assembly instruc- tions only. See page 37 for part names and descriptions. A com...

20 G730 R E Q U I R E D T O O L S Miscellaneous Sockets Hub Puller Small Internal Snap Ring Pliers Flat Blade Screw Driver (2) 1/2”-3/8” Adapter Torque Wrench 3/8” Deep Air Impact Wrench 1-1/8” Deep Rubber or Neoprene Mallet 1/4” Allen Breaker Bar 3/4” Deep Side Cutters/Snips 9/16” Deep Needle Nose ...

G730 21 NOTE: It is necessary to remove the G730™ from the vehicle before performing the repair procedures presented in this section. Before starting any disassembly, make certain that your work area is neat and clean. Clean the external parts of the transaxle. The following procedures are pre- sent...

22 G730 Refer to Figure 13 Disassembly 1. Remove all external items previously dis- cussed in their recommended order. 2. Remove filter (23) and discard. Drain oil from transaxle. Refer to page 11. 3. Remove the screws (7), separate side hous- ing (2) from main housing (1), using “pry points” as req...

G730 23 Figure 14, Axle Assembly AXLE SHAFT (Side Housing) Configuration “A” instructions listed below are for units with a serial number prior to 9068YXXXX. For serial numbers after 9068YXXXX see next page for Configuration “B” . Refer to Figure 14 Disassembly 1. Remove all items previously discuss...

25 G730 Refer to Figure 16 Disassembly 1. Remove all external items previously dis- cussed in their recommended order. 2. Remove washer (80) and reduction gear set (81-82) as an assembly and set aside. Remove second washer (80) and jack shaft pin (83). 3. Remove the spacer (92) and bevel gear (152) ...

G730 26 CHARGE PUMP Refer to Figures 17, 18 Disassembly 1. Mark the orientation of the charge pump cover relative to the main housing, prior to removal. Refer to figure 17. 2. Remove the hex head screws (134), charge pump cover, gerotor assembly, and the O- ring (132). Remove the connecting tubes (1...

27 G730 INPUT SHAFT Refer to Figure 19 Disassembly 1. Requires removal of all items beginning on page 22. 2. Remove the retaining ring (57).3. Remove the lip seal (56) and discard.4. Remove the washer (55) and the pump shaft assembly (52–53). NOTE: To assist in the removal of the pump shaft, lightly...

G730 28 Figure 20, Bypass Arm Refer to Figure 20 Disassembly 1. Requires removal of all items beginning on page 22. 2. Remove the push-on retaining ring (35) and discard. Remove the bypass arm (34). 3. Remove the retaining ring (33).4. Remove the bypass rod (32) and the clip retaining ring (31) as a...

29 G730 SWASHPLATE Figure 21, Swash Plate Refer to Figures 21, 22 Disassembly 1. Requires removal of all items beginning on page 22. 2. Remove the swashplate (40) and pump cylinder block assembly (69) as a single item. 3. Separate the pump cylinder block assembly (69) and the thrust bearing (65) fro...

G730 30 CENTER SECTION Refer to Figure 23 Disassembly 1. Requires removal of all items beginning on page 22. 2. Remove the center section mounting screws (27). 3. Remove the center section, the motor shaft (73) and the motor cylinder block assembly (64) as a single item. 4. Remove the motor cylinder...

G730 32 Figure 24, Center Section Kit (201) CENTER SECTION KIT Refer to Figure 24 Disassembly 1. Remove the bypass plate (22) from the center section. 2. Remove the plug seals (26) and discard. Refer to figure 24, on page 32. IMPORTANT: Before removing the check plugs, it is important to note their ...

33 G730 Figure 26, Pump/Motor Cylinder Block Assembly CYLINDER BLOCKS Refer to Figure 26 Inspect each component of the cylinder block assemblies for wear or damage. Inspect the cylinder blocks’ running surface for scratches or galling. Replace if necessary. NOTE: During separation of the cylinder bl...

34 G730 AXLE SHAFT (Main Housing) Refer to Figure 27 Disassembly 1. Remove all items previously discussed, in their recommended order. 2. Remove the retaining ring (90).3. Remove and discard the lip seal (96).4. Remove the axle shaft (94) in the direction of arrow. 5. Remove the bearing (95). Inspec...

If the unit has been torn down completely, the following summary identifies the assembly pro - cedures necessary to completely assemble the unit. Each assembly procedure is located by a page reference.The part reference numbers provided in each assembly procedure are keyed to the individual exploded...

G730 37 Figure 30, Screw tightening sequence diagram Starting with the number “1” screw location, tighten sequentially through to “17.”To r q u e e a c h s c r e w t o 1 0 5 – 1 5 5 l b - i n (11.87 – 17.52 Nm). NOTE: As a general rule, use the low end of the torque specification. SIDE HOUSING – SCR...

38 G730 G730 ® TRANSAXLE EXPLODED VIEW Axle Configuration A (See page’s 23, 34)

G730 39 G730 ® TRANSAXLE EXPLODED VIEW Axle Configuration B ( See Page’s 24,35)

40 G730 G730 ® TRANSAXLE PARTS LIST 1 Housing, Main 2 Housing, Side 4 Plug 9/16-18 (metal) 7 HFHCS 1/4-20 x 1.25” 10 Seal, Lip .625 x 1.0 20 Center Section 22 Plate, bypass 23 Filter, Oil 24 Check Plug or Shock Valve 25 Check Plug or Shock Valve 26 Seal, Plug 1.250 x .250 27 HFHCS 3/8-16 x 1.5 (Patc...

41 G730 Axial Piston: Type of design for hydraulic motors and pumps in which the pistons are arranged parallel with the spindle (input or output shaft). Bypass Valve: A valve whose primary function is to open a path for the fluid to bypass the motor or pump. Also referred to occasionally as the free...