Installation Instructions

ManualsBrandsToro ManualsAttachments, Parts & AccessoriesToro 105-6178

Installing the Z320 Series

Gearbox

Note: Each gearbox assembly has three individual fluid

boxes.

Removing the Gearbox

1. Remove blades and blade retainers from beneath

mower. Save the square key from each gearbox output

shaft for use with the new gearbox.

2. Remove any guards connected to the existing gearbox,

and disconnect drive shaft.

3. Remove and discard the existing gearbox mounting

bolts (8).

4. Remove existing gearbox from top of mower.

Installing the Gearbox

1. Place new gearbox on mower. The vertical output

shafts should be centered in the two cone–shaped

recesses in the top of the mower (Fig. 3).

2. Insert bolts, with washers, through mounting brackets

and into gearbox mounting holes (Fig. 3). Torque

mounting bolts to 260 ± 25 in.–lbs.

Important Torque mounting bolts to 260± 25 in.–lbs.

Bolts have pre–applied thread locker.

3. Connect driveshaft to gearbox (use new spring pin

included in kit). Attach any guards that were removed

for assembly, and connect blade assemblies to new

gearbox.

m–4629

Figure 3

1. Gearbox

2. Bolt

3. Washer

4. Pin

5. Decal

Installing the Z350 Series