Toro Z Master Z597 - Hydrostatic Pump Installation

4-5Z Master Z597 Diesel Service Manual
4
HYDRAULIC SYSTEM
Hydrostatic Pump Installation
Note: Prior to connecting the hydraulic lines,
replace the O-Rings with new ones and lightly
lubricate with petroleum jelly.
1. Install the hydrostatic pump to the frame. Install and
tighten the two bolts and nuts (Fig. 131).
Fig 131 DSC-2091
2. Install the key on the hydrostatic pump shaft; make
sure the key is facing up on the shaft (Fig. 132).
Fig 132 DSC-2095
Fig 134 DSC-2089
4. Tighten the two sets screws on the pulley using a 12-
point 3/8” (9.5mm) socket (Fig. 134).
Fig 133 DSC-2097
Note: Before installing the pulley, replace the set
screws. The end of the set screws have a
knurled cup point for retention and must not
be re-used.
3. Install pulley and hydro pump hub on the hydrostatic
pump shaft and key. Align the center of the
hydrostatic pump pulley with the center of the idler
pulley (Fig. 133).
A. Pump pulley B. Idler Pulley
A
B