Craftsman 310 Repair Manual Page 1

310-0510/-0610/-0710 Integrated Hydrostatic Transaxle Service and Repair Manual BLN-51260 July, 2011

310-0510 IHT 8 UNIT OPERATING HOT SECTION 3. TROUBLESHOOTING WARNING Do not attempt any servicing or adjust-ments with the engine running.

310-0510 IHT 9 SECTION 4. SERVICE AND MAINTENANCE NOTE: Any servicing dealer attempting a warranty repair must have prior approval before conductin

310-0510 IHT 10 FLUID CHANGE FLUID CHANGE PROCEDURE This transaxle is factory filled, sealed and does not require oil maintenance. However, in the ev

310-0510 IHT 11 PURGING PROCEDURES Due to the effects air has on efficiency in hydrostatic drive applications, it is critical that it be purged from

310-0510 IHT 12 RETURN TO NEUTRAL SETTING (FOOT CONTROL) The return to neutral mechanism on the trans-mission is designed to set the directional con

310-0510 IHT 13 BRAKE SETTING 1. Remove the brake arm bias spring, and then the cotter pin securing the brake castle nut. 2. Insert a 0.015" fee

310-0510 IHT 14 SECTION 5. REPAIR HOW TO USE THIS SECTION Each subassembly illustrated in this section is illustrated by an exploded view showing th

310-0510 IHT 15 Operation U.S. Torque Metric Torque Item Description Side Housing Screws 105-155 lb-in 12-17 Nm 7 Screw ¼-20 x 1.25 Hou

310-0510 IHT 16 2 BRAKE ASSEMBLY AND BYPASS ARM Refer to Figure 8. DISASSEMBLY 1. Remove the brake arm bias spring (66). Note the orientation of the

310-0510 IHT 17 CONTROL ARM AND FRICTION PACK Refer to Figure 9. DISASSEMBLY 1. Remove the brake assembly. See page 16. 2. Loosen and remove the

Table of Contents Section Page Foreword...

310-0510 IHT 18 Figure 10. Seal Kit Replacement SEAL KIT REPLACEMENT Before disassembly, wipe the unit free of any debris to avoid contamination. Re

310-0510 IHT 19 SIDE HOUSING Refer to Figure 11. DISASSEMBLY 1. Remove the brake assembly and bypass arm. See page 16. 2. Remove the control arm and

36 AXLE SHAFT, DIFFERENTIAL & REDUCTION GEARS Refer to Figure 12. DISASSEMBLY 1. Remove the brake assembly and bypass arm. See page 16. 2. Remov

310-0510 IHT 21 MOTOR SHAFT AND BYPASS ROD Refer to Figure 13. DISASSEMBLY 1. Remove the brake assembly and bypass arm. See page 16. 2. Remove the c

310-0510 IHT 22 INPUT SHAFT Figure 14. Input Shaft Assembly 12 Refer to Figure 14. DISASSEMBLY 1. Remove the brake assembly and bypass arm. See page

310-0510 IHT 23 HYDRAULIC COMPONENTS Refer to Figures 15-24. DISASSEMBLY (Pump Block) 1. Remove the brake assembly and bypass arm. See page 16. 2.

310-0510 IHT 24 HYDRAULIC COMPONENTS seats for excessive wear or damage. NOTE: Piston seats may be held in place in the piston by residual oil. 22.

310-0510 IHT 25 HYDRAULIC COMPONENTS 13. Tighten the center section mounting screws (44) to the proper torque. Refer to Table 5. (Swashplate/Pump Blo

310-0510 IHT 26 3 46 HYDRAULIC COMPONENTS Figure 21 Figure 19 44 44 Figure 20 124 Post 75 23 43 47 107 45 Figure 22 1 19 5 Axle Horn Figure 23 5 3 2

310-0510 IHT 27 TRANSAXLE INSTALLATION Use the following procedure to complete the installation of the transaxle on the vehicle. 1. Install and secur

310-0510 IHT 1 FOREWORD Headquartered in Sullivan, Illinois, Hydro-Gear® is a world leader in the design, manufacture, and service of quality hydrost

310-0510 IHT 28 SEALANT APPLICATION NOTE: Prior to applying the new sealant, the old sealant must be removed from all surfaces. A small consistent b

310-0510 IHT 29 310-0710 INTEGRATED HYDROSTATIC TRANSAXLE DESCRIPTION The 310-0710 transaxle is an upgraded 310-0510 unit with different axle shafts

310-0510 IHT 30 310-0710 EXPLODED VIEW

310-0510 IHT 31 No. DESCRIPTION No. DESCRIPTION 1 Main Housing, Assembly, Black Main Housing, Black Bushing .865 x .985 x .790 2 Sid

310-0510 IHT 32 310-0610 EXPLODED VIEW

310-0510 IHT 33 310-0610 ITEMS LIST No. DESCRIPTION No. DESCRIPTION 1 Main Housing, Assembly Main Housing Bushing .865 x .985 x .790

310-0510 IHT 34 310-0510 EXPLODED VIEW 6—SEALANT 57—20W-50 OIL 127—SEAL & O-RING KIT

310-0510 IHT 35 310-0510 ITEMS LIST No. DESCRIPTION No. DESCRIPTION 1 Main Housing, Assembly Main Housing, Machined Bushing .865 x .985

310-0510 IHT 36 GLOSSARY OF TERMS Axial Piston: Type of design for hydraulic motors and pumps in which the pistons are arranged parallel with the spi

310-0510 IHT 37 GLOSSARY OF TERMS Hydrostatic Transaxle: A multi-component assembly including a gear case and a hydrostatic transmission. Hydrostat

310-0510 IHT 2 INTRODUCTION The purpose of this manual is to provide information useful in servicing the Hydro-Gear® Integrated Hydrostatic Transax

310-0510 IHT 38 © 2010 HYDRO-GEAR Printed in U.S.A. Rev. P5

HYDRAULIC SCHEMATIC Figure 2 provides an illustration of the hydraulic oil circuit. The oil supply for the hydraulic system of the 310-0510 IHT is al

310-0510 IHT 4 EXTERNAL FEATURES 310-0510 Return to Neutral Option Friction Pack Option AXLE SHAFT FILL PORT EXPANSION TANK INPUT SHAFT CONTROL ARM B

310-0510 IHT 5 MODEL RECOGNITION 618-0319 166768 104-1760 173839 036932 618-0389A

310-0510 IHT 6 TECHNICAL SPECIFICATIONS Overall Transaxle Reduction 22.15:1 Input Speeds Maximum: 3000 RPM Minimum: 1800 RPM Maximum Tire Dia

310-0510 IHT 7 SECTION 2. SAFETY This symbol points out important safety instructions which, if not followed, could endanger the personal safety an