Hydro-Gear ZT-2800 Installation and operating manual

ZT-2800®/ZT-3100®/ZT-3200™
Integrated Zero-Turn Transaxle
Service and Repair Manual
BLN-52441
January 2023

ZT-2800®/ZT-3100®/ZT-3200TM iZT-2800®/ZT-3100®i
Foreword ...................................................... 1
.................................... 1
............................ 2
Introduction................................................... 2
..................................... 3
 ...................................... 4-5
 ............................... 6
 ........................................................... 7
 ............................................ 7
.................................................... 7
.......................................... 7
............................................ 7
............................................ 8
............................. 9
................................... 9
.......... 9
............................................................ 9
 ................................ 9
................................. 10
............................. 11
.................................... 12
 ........................... 13
 ....................... 14
 ................................ 15
 .......................... 16
............................. 17
 .................................. 18




 .................................... 21
 ............................................................ 22
Torques........................................................ 22
...................................... 23
........................................ 23-25
.................................................. 26
................ 27

 .............................................. 29

 ................................................... 31
 ................................................. 32
.................................................. 33
............................................. 34
...................................... 35-36
........................................ 37
................................... 38
............................................ 38
 ............................................ 39-40
 .......... 41
 .. 42
 .................. 43
ZT-2800® .... 44-45
ZT-3100® .... 44-45
ZT-3200... 44-45
.................................. 46-47
Notes ........................................................... 48
Table Of Contents

ZT-2800®/ZT-3100®/ZT-3200TM 1ZT-2800®1
FOREWORD
®



-


    

   ®
ZT-3100®

     

-




   
-

     



-


   

        



-

Figure 1, Conguration Label
PRODUCT IDENTIFICATION




 



2 ZT-2800®/ZT-3100®/ZT-3200TM
-



      

  

      


   















        
-


WARNING
Actuating the bypass will result in the
loss of hydrostatic braking capacity. The
machine must be stationary on a level
surface and in neutral when actuating
the bypass.
Introduction
        -
®
ZT-2800®®
    

-


-

  
        
    

   Do not use a pressure washer to
clean the unit.
General Description
      

-



      
     -

-
     








DESCRIPTION AND OPERATION

ZT-2800®/ZT-3100®/ZT-3200TM 3ZT-2800®3
Figure 3, Hydraulic Schematic Without Charge Pump (ZT-2800)
HYDRAULIC SCHEMATIC
Figure 2, Hydraulic Schematic With Charge Pump
















 



4 ZT-2800®/ZT-3100®/ZT-3200TM
EXTERNAL FEATURES ZT-2800®/ZT-3100®/ZT-3200TM



— Top View —




— Inboard View —

 

ZT-2800®/ZT-3100®/ZT-3200TM 5ZT-2800®5
EXTERNAL FEATURES ZT-2800®/ZT-3100®/ZT-3200TM
— Outboard View—Left (Standard Control) —
— Outboard View—Right (Return To Neutral Control) —








6 ZT-2800®/ZT-3100®/ZT-3200TM
TECHNICAL SPECIFICATIONS
SPECIFICATIONS ZT-2800®
ZH/ZJ ZK/ZL ZM

Reductions 20.69:1 24.74:1 27.23:1
 0.61 in3
 0.97 in3
 






 
 
 
 




SPECIFICATIONS ZT-3100®ZT-3200TM
ZJ ZL ZM ZM

Reductions 20.69:1 24.74:1 27.23:1 27.23:1
 0.61 in3
 0.97 in3
 





  

 
  

  





ZT-2800®/ZT-3100®/ZT-3200TM 7ZT-2800®7

      -

-
-
     
 HEED ITS WARNING.
WARNING
POTENTIAL FOR SERIOUS INJURY
Inattention to proper safety, operation, or
maintenance procedures could result in
personal injury, or damage to the equip-
ment. Before servicing or repairing the
transaxle, fully read and understand
the safety precautions described in this
section.
Personal Safety



      
      


 
 
     -
tions.
       



 

-

     






Tool Safety



Work Area Safety





         -
   

Servicing Safety






-

-

be present.
“Discard used cleaning material in the ap-
propriate containers according to local,
state, and federal regulations.”
SAFETY

8 ZT-2800®/ZT-3100®/ZT-3200TM
TROUBLESHOOTING

       


      

    



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.
TROUBLESHOOTING CHECKLIST
Possible Cause Corrective Action
Unit Operates In One Direction Only
 
 
Vehicle Does Not Drive/Track Straight
 
 
 
 
Unit Is Noisy
 
 
 
 
 
 
Unit Has No/Low Power
 
 
 
 
 
 
 
 
Unit Is Operating Hot
 󰀨
 
 
 
 
 
Transaxle Leaks Oil
 
 