TECHNICAL MANUAL

1 TECHNICAL MANUALL itho in DeereLawn & Grounds Care DivisionTRS21/21E/22/24/26/27/32 andTRX24/26 Walk-BehindSnowthrowers/SnowblowersTM146 6 (20 Jan95)Replaces TM1466 (25 Aug92)FOREWORDThis MANUAL is written for an experienced tools required in performing certain servicework are identified in this MANUAL and arerecommended for with safety: Read the safety messages in theintroduction of this MANUAL and the cautionspresented throughout the text of the is the safety-alert symbol. When you seethis symbol on the machine or in this MANUAL ,be alert to the potential for personal manuals are divided in two parts: repairand diagnostics. Repair sections tell how to repair thecomponents. Diagnostic sections help you identify themajority of routine failures is organized in groups for the variouscomponents requiring service instruction. At thebeginning of each group are summary listings of allapplicable essential tools, other materials needed todo the job and service parts 10, Group 15 Repair Specifications, consistof all applicable specifications, near tolerances andspecific torque values for various components oneach individual , binder labels, and tab sets can be orderedby John Deere dealers direct from the John DeereDistribution Service MANUAL is part of a total product MANUALS REFERENCETECHNICAL MANUALS MACHINE SERVICECOMPONENT MANUALS COMPONENT SERVICEF undamentals of Service (FOS) Manuals cover basictheory of operation, fundamentals of troubleshooting,general maintenance, and basic type of failures andtheir causes.

2 FOS Manuals are for training newpersonnel and for reference by Manuals are concise guides for specificmachines. TECHNICAL manuals are on-the-job guidescontaining only the vital information needed fordiagnosis, analysis, testing, and TECHNICAL Manuals are concise serviceguides for specific components. Component technicalmanuals are written as stand-alone manuals coveringmultiple machine ,TMIFC,A -19-18 OCT91 IntroductionTM1466 (25 AUG92) TRS/TRX Series Snowblowers270995 ContentsSECTION 10 GENERAL INFORMATIONG roup 05 SafetyGroup 10 General SpecificationsGroup 15 Repair SpecificationsGroup 20 Fuels and LubricantsGroup 25 Serial Number LocationsSECTION 20 4 AND 5-HP ENGINEREPAIR TRS22 AND TRS/TRX24 Group 05 Carburetor, Fuel Tank, and MufflerGroup 10 Remove and Install EngineGroup 15 Blower Housing, Cylinder Head, and BreatherGroup 20 Governor, Camshaft, and TappetsGroup 25 Flywheel, Crankshaft and Piston AssemblyGroup 30 Cylinder BlockGroup 35 Recoil StarterSECTION 21 8 AND 10-HP ENGINEREPAIR TRS/TRX26, TRS27,TRS32 Group 05 Carburetor, Fuel Tank, and MufflerGroup 10 Remove and Install EngineGroup 15 Blower Housing, Cylinder Head, and BreatherGroup 20 Governor, Camshaft, and TappetsGroup 25 Flywheel.

3 Crankshaft and Piston AssemblyGroup 30 Cylinder BlockGroup 35 Recoil StarterSECTION 25 4 AND 5-HP ENGINE REPAIR TRS21 Group 05 Fuel System and MufflerGroup 10 EngineGroup 15 Recoil StarterSECTION 40 ELECTRICALG roup 05 Electric Starter 4-Cycle EnginesGroup 06 Electric StarterGroup 10 4 and 5-HP Ignition and ChargingSystemGroup 15 8 and 10-HP Ignition and ChargingSystemGroup 20 4 HP (2-Cycle) Ignition SystemSECTION 50 POWER TRAIN TRS22,TRS/TRX24 & 26 Group 05 Drive Belt Care and MaintenanceGroup 10 Power Train RepairGroup 15 Blower and Auger Drive RepairSECTION 55 POWER TRAIN TRS27 AND 32 Group 05 Drive Belt Care and MaintenanceGroup 10 Power Train Repair TRS27 and 32( 140000)Group 15 Blower and Auger Drive RepairGroup 20 Power Train Repair TRS27 and 32( 140001 )SECTION 85 AUGER DRIVE SYSTEM TRS21 Group 05 Drive Belt Care and MaintenanceGroup 10 Auger Drive RepairSECTION 210 TEST AND ADJUSTMENTSPECIFICATIONS/OPERATIONALCHEC KOUT PROCEDURESG roup 05 Test and Adjustment SpecificationsGroup 10 Operational Checkout ProceduresSECTION 220 ENGINE 4-CYCLE ENGINESG roup 05 Component LocationGroup 10 Theory of OperationGroup 15 Diagnosis, Tests and AdjustmentsSECTION 225 ENGINE 2-CYCLE ENGINESG roup 05 Component LocationGroup 10 Theory of OperationGroup 15 Diagnosis, Tests and AdjustmentsContinued on next pageAll information, illustrations and specifications in this MANUAL are based onthe latest information available at the time of publication.

4 The right isreserved to make changes at any time without 1995 DEERE & COMPANYM oline, IllinoisAll rights reservedA John Deere ILLUSTRUCTION ManualPrevious EditionsCopyright 1989 Deere & Companyi1020212540505585210220 SECTION 230 FUEL SYSTEM 4-CYCLE ENGINESG roup 05 Component Location 4-Cycle EngineGroup 10 Theory of OperationGroup 15 Diagnosis and Adjustments 4-CycleEngineSECTION 235 FUEL SYSTEM 2-CYCLE ENGINEG roup 05 Component Location 2-Cycle EngineGroup 10 Theory of OperationGroup 15 Diagnosis and Tests 2-Cycle EngineSECTION 240 ELECTRICAL SYSTEM 4-CYCLE ENGINESG roup 05 Component Location 4-Cycle EngineGroup 10 Theory of OperationGroup 15 Diagnosis, Tests and Adjustments 4-Cycle EngineSECTION 245 ELECTRICAL SYSTEM 2-CYCLE ENGINESG roup 05 Component Location 2-Cycle EngineGroup 10 Theory of OperationGroup 15 Diagnosis and Adjustments 2-CycleEngineSECTION 250 POWER TRAIN TRS22,TRS/TRX24 AND 26 Group 05 Component Location TRS22,TRS/TRX24 and 26 Group 10 Theory of OperationGroup 15 Diagnosis and Adjustments TRS22,TRS/TRX24 and 26 SECTION 255 POWER TRAIN TRS27, AND 32 Group 05 Component Location TRS27 and 32 Group 10 Theory of OperationGroup 15 Diagnosis and Adjustments TRS27 and 32 SECTION 280 AUGER DRIVE SYSTEM 2 STAGEG roup 05 Component Location 2 StageGroup 10 Theory of OperationGroup 15 Diagnosis and Adjustments 2 StageSECTION 285 AUGER DRIVE SYSTEM TRS21 Group 05 Component Location Single StageGroup 10 Theory of OperationGroup 15 Diagnosis and Adjustments Single StageContentsii1020212540505585210220 Section 10 GENERAL INFORMATIONC ontentsPageGroup 05 Safety.

5 10-05-1 Group 10 General SpecificationsMachine SpecificationsTRS21 and 22 .. 10-10-1 TRS/TRX24 and 26 .. 10-10-3 TRS27 and 32 .. 10-10-6 Group 15 Repair SpecificationsRepair SpecificationsTRS21/21ES .. 10-15-1 TRS22 and TRS/TRX24 .. 10-15-2 TRS/TRX26 .. 10-15-5 TRS27 and 32 .. 10-15-7 Inch Cap Screw Torque Values .. 10-15-10 Set Screw Seating Torque Chart .. 10-15-11 Group 20 Fuels and LubricantsTwo-Cycle Gasoline Engine Oil .. 10-20-1 Two-Cycle Engine Fuel .. 10-20-1 Fuel .. 10-20-2 Engine Oil .. 10-20-2 Gear Oil .. 10-20-3 Grease .. 10-20-3 Group 25 Serial Number LocationsSerial Number Information .. 10-25-1 Product Identification Number Location .. 10-25-1 Engine Serial Number Location .. 10-25-2 Group 30 Features and Accessories .. 10-30-1 TM1466 (25 AUG92) 10-1 TRS/TRX Series Snowblowers27099510 RECOGNIZE SAFETY INFORMATIONThis is the safety-alert symbol. When you see thissymbol on your machine or in this MANUAL , be alert tothe potential for personal recommended precautions and safe -UN-07 DEC88 UNDERSTAND SIGNAL WORDSA signal word DANGER, WARNING, or CAUTION isused with the safety-alert symbol.

6 DANGER identifies themost serious or WARNING safety signs are located nearspecific hazards. General precautions are listed onCAUTION safety signs. CAUTION also calls attention tosafety messages in this -19-30 SEP88 FOLLOW SAFETY INSTRUCTIONSC arefully read all safety messages in this MANUAL and onyour machine safety signs. Keep safety signs in goodcondition. Replace missing or damaged safety signs. Besure new equipment components and repair parts includethe current safety signs. Replacement safety signs areavailable from your John Deere how to operate the machine and how to usecontrols properly. Do not let anyone operate your machine in proper working modifications to the machine may impairthe function and/or safety and affect machine you do not understand any part of this MANUAL andneed assistance, contact your John Deere -UN-23 AUG88DX,ALERT -19-04 JUN90DX,SIGNAL -19-09 JAN92DX,READ -19-04 JUN90 Group 05 SafetyTM1466 (25 AUG92) 10-05-1 TRS/TRX Series Snowblowers27099510051 HANDLE FLUIDS SAFELY AVOID FIRESWhen you work around fuel, do not smoke or work nearheaters or other fire flammable fluids away from fire hazards.

7 Do notincinerate or puncture pressurized sure machine is clean of trash, grease, and not store oily rags; they can ignite and -UN-23 AUG88 PREPARE FOR EMERGENCIESBe prepared if a fire a first aid kit and fire extinguisher emergency numbers for doctors, ambulanceservice, hospital, and fire department near -UN-23 AUG88 WEAR PROTECTIVE CLOTHINGWear close fitting clothing and safety equipmentappropriate to the exposure to loud noise can cause impairmentor loss of a suitable hearing protective device such asearmuffs or earplugs to protect against objectionable oruncomfortable loud equipment safely requires the full attention ofthe operator. Do not wear radio or music headphoneswhile operating -UN-23 AUG88DX,FLAME -19-04 JUN90DX,FIRE2 -19-04 JUN90DX,WEAR -19-10 SEP90 SafetyTM1466 (25 AUG92) 10-05-2 TRS/TRX Series Snowblowers27099510052 SERVICE MACHINES SAFELYTie long hair behind your head.

8 Do not wear a necktie,scarf, loose clothing, or necklace when you work nearmachine tools or moving parts. If these items were to getcaught, severe injury could rings and other jewelry to prevent electricalshorts and entanglement in moving -UN-23 AUG88 WORK IN VENTILATED AREAE ngine exhaust fumes can cause sickness or death. If itis necessary to run an engine in an enclosed area,remove the exhaust fumes from the area with anexhaust pipe you do not have an exhaust pipe extension, open thedoors and get outside air into the -UN-23 AUG88 WORK IN CLEAN AREAB efore starting a job: Clean work area and machine. Make sure you have all necessary tools to do your job. Have the right parts on hand. Read all instructions thoroughly; do not -UN-18 OCT88DX,LOOSE -19-04 JUN90DX,AIR -19-04 JUN90DX,CLEAN -19-04 JUN90 SafetyTM1466 (25 AUG92) 10-05-3 TRS/TRX Series Snowblowers27099510053 REMOVE paint BEFORE WELDING ORHEATINGA void potentially toxic fumes and fumes can be generated when paint isheated by welding, soldering, or using a all work outside or in a well ventilated area.

9 Disposeof paint and solvent paint before welding or heating: If you sand or grind paint , avoid breathing the an approved respirator. If you use solvent or paint stripper , remove stripperwith soap and water before welding. Remove solvent orpaint stripper containers and other flammable materialfrom area. Allow fumes to disperse at least 15 minutesbefore welding or -UN-23 AUG88 ILLUMINATE WORK AREA SAFELYI lluminate your work area adequately but safely. Use aportable safety light for working inside or under themachine. Make sure the bulb is enclosed by a wirecage. The hot filament of an accidentally broken bulbcan ignite spilled fuel or -UN-23 AUG88 REPLACE SAFETY SIGNSR eplace missing or damaged safety signs. See themachine operator s MANUAL for correct safety -UN-23 AUG88DX, paint -19-04 JUN90DX,LIGHT -19-04 JUN90DX,SIGNS1 -19-04 JUN90 SafetyTM1466 (25 AUG92) 10-05-4 TRS/TRX Series Snowblowers27099510054 SERVICE TIRES SAFELYE xplosive separation of a tire and rim parts can causeserious injury or not attempt to mount a tire unless you have theproper equipment and experience to perform the maintain the correct tire pressure.

10 Do not inflatethe tires above the recommended pressure. Never weldor heat a wheel and tire assembly. The heat can causean increase in air pressure resulting in a tire can structurally weaken or deform the inflating tires, use a clip-on chuck and extensionhose long enough to allow you to stand to one side andNOT in front of or over the tire assembly. Use a safetycage if wheels for low pressure, cuts, bubbles, damagedrims or missing lug bolts and -UN-12 APR90 PRACTICE SAFE MAINTENANCEU nderstand service procedure before doing work. Keeparea clean and lubricate or service machine while it is hands, feet, and clothing from power-driven all power. Stop the engine. Remove the machine to support any machine elements that must beraised for service all parts in good condition and properly damage immediately. Replace worn or broken any buildup of grease, oil, or -UN-23 AUG88DX,TIRECP -19-24 AUG90MX,SERV,CP -19-16 JUL92 SafetyTM1466 (25 AUG92) 10-05-5 TRS/TRX Series Snowblowers27099510055 USE PROPER TOOLSUse tools appropriate to the work.