Exploded Diagrams
Diagram Legend:
- Red: Engine Components
- Blue: Cutting Deck Assembly
- Green: Drive System
- Yellow: Control Components
- Purple: Wheels & Axle
Major Assembly Diagrams
- Engine Assembly: Complete breakdown of Briggs & Stratton engine components including carburetor, air filter, and ignition system.
- Cutting Deck: Detailed view of blade assembly, spindle housing, and deck shell with all mounting points.
- Drive System: Transmission components, drive belt routing, and pulley assemblies.
- Control System: Handle assembly, control cables, and operator presence components.
- Wheel Assembly: Axle, wheel bearings, and adjustment mechanisms.
- Fuel System: Fuel tank, lines, filter, and connections.
- Electrical System: Wiring harness, switches, and safety interlock system.
Parts List
| Model Number | 20332 |
| Engine Type | Briggs & Stratton 725EXI |
| Engine Power | 163 cc |
| Cutting Width | 21 inches |
| Cutting Height Range | 1.5 - 4 inches |
| Deck Material | 14-Gauge Steel |
| Blade Type | High-Lift Mulching Blade |
| Drive System | Front-Wheel Drive |
| Wheel Size | 8 inches (Front), 10 inches (Rear) |
| Fuel Capacity | 1.5 quarts |
| Weight | 65 lbs |
| Warranty | 3 Years Limited |
Major Component Part Numbers
- Engine Assembly: 123-4567-00
- Cutting Deck: 123-4568-00
- Blade Set (3): 123-4569-00
- Drive Belt: 123-4570-00
- Air Filter: 123-4571-00
- Spark Plug: 123-4572-00
- Fuel Filter: 123-4573-00
- Wheel Set: 123-4574-00
For parts ordering, contact Toro Customer Service at 1-888-384-9939 or visit Toro.com/parts
Assembly Instructions
Handle Assembly
Step-by-step instructions for attaching the folding handle assembly including proper bolt torque specifications and safety cable routing.
Cutting Deck Installation
Detailed guide for mounting the cutting deck to the main frame, including belt routing and height adjustment linkage setup.
Control Cable Adjustment
Proper adjustment procedures for drive control cables and blade engagement cables to ensure smooth operation.
Wheel Installation
Instructions for installing front and rear wheels with proper axle placement and securing hardware.
Engine Preparation
Pre-start procedures including oil fill, fuel system preparation, and initial startup checks.
Safety System Check
Verification of all safety systems including operator presence control and blade brake clutch operation.
Required Tools for Assembly
Socket Set
3/8" drive with 10mm, 13mm, and 1/2" sockets
Wrenches
Combination wrenches in sizes matching socket set
Screwdrivers
#2 Phillips and medium flathead screwdrivers
Pliers
Adjustable pliers and needle-nose pliers
Torque Wrench
3/8" drive torque wrench for critical fasteners
Safety Gear
Work gloves and safety glasses for assembly
Maintenance Parts
| Maintenance Item | Part Number | Replacement Interval |
|---|---|---|
| Air Filter Element | 123-4571-00 | Every 25 hours or season |
| Spark Plug | 123-4572-00 | Every 100 hours or annually |
| Oil Filter | 123-4575-00 | Every 50 hours |
| Drive Belt | 123-4570-00 | Every 2 seasons or as needed |
| Blade Set (3) | 123-4569-00 | Every season or when damaged |
| Fuel Filter | 123-4573-00 | Every 100 hours |
| Wheel Bearings | 123-4576-00 | Every 3 seasons or as needed |
| Control Cables | 123-4577-00 | As needed |
Maintenance Kits
- Tune-Up Kit: 123-4600-00 - Includes air filter, spark plug, oil filter, and oil
- Blade Maintenance Kit: 123-4601-00 - Includes 3 blades, blade bolts, and washers
- Seasonal Service Kit: 123-4602-00 - Complete kit for end-of-season maintenance
- Belt Replacement Kit: 123-4603-00 - Includes drive belt and deck belt
- Wheel Bearing Kit: 123-4604-00 - Complete bearing set for all wheels
- Fuel System Kit: 123-4605-00 - Fuel filter, fuel line, and clamps
Manual Downloads
Toro Flex 21 Series Manuals
20332
Flex 21 Push Mower
20333
Flex 21 Self-Propelled
20334
Flex 21 Electric Start
20335
Flex 21 Commercial
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