Service Manual

ManualsBrandsToro ManualsGas Snow BlowersPower Clear 721 R 21 in. 212 cc Single-Stage Self Propelled Gas Snow Blower

Table Of Contents

Revision History
Preface
- Service Procedure Icons
Chapter 1 : Safety
- Safety Instructions
  - Think Safety First
Chapter 2 : Specifications and Maintenance
- Specifications
- Torque Specifications
  - Equivalents and Conversions
  - U.S. to Metric Conversions
Chapter 3 : Troubleshooting
- General Troubleshooting
- Engine Model/Serial Number Location
Chapter 4 : Starter System
- General Information
- Service and Repairs
  - Recoil Replacement
Chapter 5 : Fuel System
- General Information
- Service and Repairs
Chapter 6 : Governor Controls
- General Information
- Service and Repairs
  - Speed Control Assembly Replacement (G210–1, G210–2, & G210–4)
  - Governor Arm Replacement (G210–1, G210–2, & G210–4)
Chapter 7 : Compression System
- General Information
- Service and Repairs
  - Cylinder Head Replacement (G210–1, G210–2, & G210–4)
  - Piston and Connecting Rod Replacement
Chapter 8 : Electrical
- General Information
- Service and Repairs
Chapter 9 : Engine Lower End
- General Information
- Service and Repairs

PistonandConnectingRodInspection(continued)

g338335

Figure206

PistonRingThickness

Ring

StandardServiceLimit

Width(Top)1.2mm(0.04724inch)1.07mm(0.04213inch)

Width(Middle)1.2mm(0.04724inch)1.07mm(0.04213inch)

•Measureandverifythepistonringendgapistospecication.

Standard:0.2–0.4mm(0.0079–0.0157inch)

ServiceLimit:1.0mm(0.0394inch)

PistonandConnectingRodAssembly

1.Installeachpistonringontothedomeendofthepiston.Startwiththe3

pieceoilring,followedbythemiddlering,andthenthetopring.Theupper

tworingsarestampedneartheringgap,assemblewiththestampmark

facingthepistondome.

Note:Thepistonringswillbreakiftwistedoroverexpanded.

g338340

Figure207

1.T opRing

3.OilRing

2.MiddleRing

CompressionSystem:ServiceandRepairs

Page7–48

G210EngineServiceManual

3439-732RevA