Sabre 15538 Hydro - HYDROSTATIC POWER TRAIN; SPECIFICATIONS; COMPONENT LOCATION; THEORY OF OPERATION

2/11/97 6 - 1
CONTENTS CONTINUED HYDROSTATIC POWER TRAIN
Page
HYDROSTATIC POWER TRAIN
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
REPAIR SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
OTHER MATERIALS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
COMPONENT LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
COMPONENT LOCATION—K55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
COMPONENT LOCATION—K55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
COMPONENT LOCATION—K51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
COMPONENT LOCATION—K51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
TRACTION DRIVE SYSTEM COMPONENT LOCATION. . . . . . . . . . . . . . . . . . . . . 10
PEDAL LINKAGE ASSEMBLY COMPONENT LOCATION . . . . . . . . . . . . . . . . . . . 11
SHIFT LINKAGE COMPONENT LOCATION—K–55 TRANSAXLE . . . . . . . . . . . . . 12
SHIFT LINKAGE COMPONENT LOCATION—K–51 TRANSAXLE . . . . . . . . . . . . . 13
THEORY OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
TRACTION DRIVE BELT SYSTEM OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 14
TRANSAXLE AND SHIFT LINKAGE SYSTEM OPERATION. . . . . . . . . . . . . . . . . . 14
BRAKE/NEUTRAL RETURN PEDAL COMPONENT LOCATION & OPERATION. . 16
TRANSPORT (FREE-WHEEL) SYSTEM OPERATION—K55 . . . . . . . . . . . . . . . . . 19
TRANSPORT (FREE-WHEEL) SYSTEM OPERATION—K51 . . . . . . . . . . . . . . . . . 20
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
DIAGNOSIS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
DIAGNOSIS—K55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
DIAGNOSIS —K51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
TESTS AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
TRACTION DRIVE SYSTEM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
DRIVE BELT ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
TRANSPORT (FREE-WHEEL) VALVE ADJUSTMENT—K55 . . . . . . . . . . . . . . . . . 31
SHIFT LINKAGE ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
BELLCRANK SPRING TENSION ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . 32
BRAKE SPRING ADJUSTMENT—K55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
BRAKE SPRING ADJUSTMENT—K51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
NOTE: INSPECTION, DISASSEMBLY, AND REPAIR INSTRUCTIONS
SHOWN IN THIS MANUAL ARE FOR OUT-OF-WARRANTY
REPAIRS ONLY.
This transaxle is warranted for 2 years (residential-homeowner
application) or 90 days (commercial application). Should an
internal defect result in a transaxle failure within the warranty
period, John Deere will replace the transaxle assembly.
NOTE: If internal hydro component parts are suspected (after
performing all
external checks and adjustments) CALL SABRE
SERVICE DEPARTMENT FOR AUTHORIZATION TO REPLACE
TRANSAXLE ASSEMBLY.
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