Dixon ZTR 5000 Series 2000 Operator's Manual page 34

CARE AND MAINTENANCE
Adjustment of the drive system is limited to the actual function of the hydrostatic
transmissions as outlined below.
T-BOX TO HYDROSTAT BELT ADJUSTMENT:
Tighten the (2) J-bolts on the T-box mounting plate until each belt has 1/8th
to 1/4th of an inch free play or movement at a mid-point between the pulleys
on the hydrostats and T-Box.
Each hydrostat has a bypass relief pin located at the rear of the
hydrostatic unit. A bypass keeper is provided to allow the mower to be
rolled around without engine running. To accomplish this, the bypass
keeper springs must be positioned to depress the bypass relief pins.
Remove bypass keeper springs prior to actual operation of the mower.
Page 34
ADJUSTMENT POINTS FOR
T-BOX BELT TENSION
Bypass Relief Pin