Installation Instructions

ManualsBrandsToro ManualsAttachments, Parts & AccessoriesToro 105-6178

Printed in the USA

 2001 by The Toro Company

8111 Lyndale Avenue South

Bloomington, MN 55420-1196

Gearbox Service Kit

Z Master 320/350 Series 48 Mower

Part No. 105–6172

Part No. 105–6178

Form No. 3327–295

Installation Instructions

Loose Parts

Note: Use the chart below to identify parts for assembly.

DESCRIPTION QTY. USE

Gearbox

Screw

Washer

Spring Pin

Installing the Gearbox

Decal 1 Installing the Decal

Blade Bolt, Lefthand thread 1 Installing the Blade Bolt

Identifying the Mowers

There are two types of mowers that this gearbox can be

installed on. There is the Z320 Series and the Z350 Series.

Identify the mower type you have in figures 1 and 2.

Z320 Series Mower

If you have a mower, with height–of–cut brackets, as

shown in figure 1 then proceed to page 2 for installation

instructions.

m-4978

Figure 1

1. Z320 Series mower 2. Height–of–Cut Brackets

Z350 Series Mower

If you have a mower, with height–of–cut posts, as shown

in figure 2 then proceed to page 2 for installation

instructions.

m–4857

Figure 2

1. Z350 Series mower 2. Height–of–Cut Posts

Summary of content (4 pages)

PAGE 1
Form No. 3327–295 Gearbox Service Kit Z Master 320/350 Series 48 Mower Part No. 105–6172 Part No. 105–6178 Installation Instructions Loose Parts Note: Use the chart below to identify parts for assembly. DESCRIPTION QTY. USE Gearbox 1 Screw 8 Washer 8 Spring Pin 1 Decal 1 Installing the Decal Blade Bolt, Lefthand thread 1 Installing the Blade Bolt Installing the Gearbox Identifying the Mowers Z350 Series Mower There are two types of mowers that this gearbox can be installed on.
PAGE 2
Installing the Z320 Series Gearbox Installing the Z350 Series Gearbox Note: Each gearbox assembly has three individual fluid boxes. Note: Each gearbox assembly has three individual fluid boxes. Removing the Gearbox 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. 1. Remove blades and blade retainers from beneath mower.
PAGE 3
Installing the Decal Change fluid: • after initial 100 operating hours. A new decal has been provided to replace the existing gearbox lubricant decal on the mower. This is for both Z320 and Z350 series gearboxes. • each year before storage. Fluid Type: 85W–140 Mobilube or equivalent 1. Thoroughly clean mower in area of lubrication decal. Install new decal over the existing decal (Fig. 3 and 4). Important Do not mix fluids. Installing the Blade Bolt Gearbox Capacity: 5–1/2 oz. (129.
PAGE 4
8. Fill gearbox with 5–1/2 ounces (129.6 ml) of gearbox fluid. For correct fluid; refer to Gearbox Fluid, on page 3. 9. Reinstall the top plug into the gearbox using pipe sealant (Fig. 6). 10. Repeat for remaining gearboxes. 2 2 3 3 1 3 4 1 4 M-4531 Figure 6 1. Gearbox 2. Top plug 3. Side plug 4. Bottom plug Checking the Gearbox Fluid The gearbox fluid must be checked after every 100 operating hours. Check all three gearboxes. 1.