Service Manual

ZT-4400 i
Foreword........................................................1
Description and Operation.............................2
Introduction....................................................2
General Description 2-6
Hydraulic Schematic............................3
External Features................................4
 TechnicalSpecications........................6
 ProductIdentication............................6
Safety 7
Personal Safety......................................7
Tool Safety............................................7
Work Area Safety.................................7
Servicing Safety....................................7
Troubleshooting 8
Service and Maintenance 9-12
Fluid Change Procedure....................10
Purging Procedure...............................11
Return to Neutral Setting......................12
Tear Down and Reassembly 13-37
Transaxle Removal............................14
Tools..................................................15
Torques..............................................15
 FanandPulley...................................16
 AxleHubAssembly............................16
Return to Neutral Assembly Option....17
Control Arm Assembly.......................18
Filter and Filter Cover.........................19
Brake Assembly..................................20
Bypass Actuator.................................21
Side Housing......................................22
Axle Shaft and Planetary Gear Set....23
Reduction Gears................................24
Remove Filter Tube...........................25
 InputShaft..........................................26
Swashplate........................................27
Center Section...................................28
Motor Shaft Assembly........................29
Brake assembly.................................30
Thrust Bearing....................................31
Inspecting the Hydraulic components..32
Shock Valves, Charge Relief, Charge
Pump, Magnet...................................33
Assembly After a Complete Teardown.34
Sealant Application.............................35
Side Housing – Screw Tightening
 Sequence..........................................36
Castle Nut (113) Alternate Torque
Method...............................................37
ZT-4400 Exploded View................................38
ZT-4400 Transaxle Parts List........................39
Glossary of Terms....................................40-41
TABLE OF CONTENTS