Toro Lawn-BoySeries Service Manual
  1. Manuals
  2. Brands
  3. Toro Manuals
  4. Snow Blower
  5. LAWN-BOY Series
  6. Service manual

Toro Lawn-BoySeries Service Manual

2-stage snowthrower drive systems
Hide thumbs Also See for Lawn-BoySeries:
Table of Contents

Advertisement

Quick Links

TORO/LAWN-BOY TWO STAGE SNOWTHROWER DRIVE SYSTEMS MANUAL
Table of Contents – Page 1 of 2
AUGER GEARBOX SERVICE
GENERAL INFORMATION
AUGER GEARBOX LUBRICANT
GEARBOX REMOVAL
PRIMARY METHOD — MINIMUM DISASSEMBLY
SECONDARY METHOD — TRACTION AND AUGER HOUSINGS SEPARATED:
TORO MODELS 38065 AND 38080
ALL OTHER MODELS
INSTALLATION
AUGER GEARBOX DISASSEMBLY / SERVICE
FAILURE ANALYSIS
GEARBOX ASSEMBLY
BELTS, CONTROLS AND LINKAGES
INTRODUCTION
REPLACING THE AUGER/IMPELLER DRIVE BELT
REPLACING THE TRACTION BELT
REPLACING THE TRACTION BELT
TORO MODELS 38065, 38080, 38085
LAWN-BOY MODELS 28230, 28231
TORO MODELS 38051, 38052, 38054, 38056, 38062, 38063, 38064, 38072, 38073
LAWN-BOY MODEL 28232
TORO MODELS 38053, 38066, 38078, 38083, 38084, 38086
CONTROL AND LINKAGE ADJUSTMENT
AUGER CONTROL ADJUSTMENT — TORO MODELS 38065, 38080, 38085
INSTALL AUGER DRIVE CONTROL ROD
ADJUSTING AUGER/IMPELLER DRIVE BELT
AUGER/IMPELLER DRIVE CONTROL LINKAGE — ALL OTHER MODELS
ADJUSTING TRACTION CONTROL
ADJUSTING THE TRACTION CONTROL
TORO MODELS 38065, 38080, 38085
824XL (TORO MODELS 38066, 38078, 38083, 38084, 38086
LAWN-BOY MODEL 28232
ADJUSTING THE TRACTION ROD
LAWN-BOY MODELS 28230, 28231
TORO MODELS 38051, 38052, 38054, 38056, 38062, 38063, 38064
ADJUSTING THE SPEED SELECTOR
TRACTION DRIVE SYSTEMS
INTRODUCTION
TROUBLESHOOTING THE TRACTION DRIVE — ALL MODELS
DISASSEMBLY
TORO MODELS 38065, 38080, 38085
ASSEMBLY
TORO MODELS 38065, 38080, 38085
PREPARATION
ASSEMBLY

Advertisement

Table of Contents
loading

Related Manuals for Toro Lawn-BoySeries

Summary of Contents for Toro Lawn-BoySeries

  • Page 1 REPLACING THE TRACTION BELT REPLACING THE TRACTION BELT TORO MODELS 38065, 38080, 38085 LAWN-BOY MODELS 28230, 28231 TORO MODELS 38051, 38052, 38054, 38056, 38062, 38063, 38064, 38072, 38073 LAWN-BOY MODEL 28232 TORO MODELS 38053, 38066, 38078, 38083, 38084, 38086 CONTROL AND LINKAGE ADJUSTMENT AUGER CONTROL ADJUSTMENT —...
  • Page 2 Table of Contents – Page 2 of 2 TRACTION DRIVE SYSTEMS - CONTINUED DISASSEMBLY LAWN-BOY MODELS 28230, 23231 TORO MODELS 38051, 38052, 38054, 38056, 38062, 38063, 38064, 38072, 38073 ASSEMBLY LAWN-BOY MODELS 28230, 23231 TORO MODELS 38051, 38052, 38054, 38056, 38062, 38063, 38064, 38072, 38073...
  • Page 3 2-Stage Snowthrower Drive Systems Service Manual...
  • Page 4 About This Manual This manual was written expressly for the Toro and Lawn-Boy servicing dealer. The Toro Company has made every effort to make the information in this manual complete and correct. This manual was written with assumption that the reader has basic mechanical knowledge and skills.

  • Page 5: Table Of Contents

    Assembly ......3-18 Toro Models 38065, 38080, 38085 ..Axle and Friction Plate Disassembly ..
  • Page 6 THIS PAGE INTENTIONALLY LEFT BLANK Two Stage Snowthrower Drive Systems Manual...
  • Page 7 38086 824XL 2000-2002 90 wt. Model numbers 28XXX are Lawn-Boy. Model numbers 38XXX are Toro. Engines: All of the models in the table were manufactured with engines from the Tecumseh Products Company. Refer to their service manual for engine information.
  • Page 8 THIS PAGE INTENTIONALLY LEFT BLANK Introduction - 2 Two Stage Snowthrower Drive Systems Manual...

  • Page 9: Auger Gearbox Service

    MAG 1 is a special low temperature grease made by Lubriplate™. Use 1/3 tube of MAG 1 per gearbox. Obtain from your area Lubriplate Distributor or from your Toro parts supplier (Toro Part Number 505-101) (Figure 2). Two Stage Snowthrower Drive Systems Manual...

  • Page 10: Primary Method - Minimum Disassembly

    Auger Gearbox Service Primary Method — Minimum Disassembly In the center of each side plate are either two or four cap screws (depending on the model). These go into the bearing that supports each side of the The following steps apply to all models. auger.
  • Page 11 Auger Gearbox Service Loosen the rear and remove the front capscrew securing the idler arm to the chassis. Figure 9 2768-023 1. Pulley 2. Auger housing Model 38065 and 38080 only — Disconnect the Figure 7 (2) scraper springs from either the slot in the side M-3331 plates or from the scraper.

  • Page 12: Secondary Method - Traction And Auger Housings Separated: Toro Models 38065 And 38080

    Secondary Method — Traction and Auger Housings Separated: Toro Models 38065 and 38080 Remove the belt cover. Loosen the belt guide and remove the auger belt (Figure 12).

  • Page 13: Secondary Method - Traction And Auger Housings Separated

    Auger Gearbox Service There are 4 locknuts in the forward part of the housing. These are on studs from the auger. Remove the locknuts. The traction assembly will now lift straight up off the auger assembly (Figure 15). Figure 17 MVC-534 Place a block of wood under BOTH the auger and traction assembly to support them when the...

  • Page 14: Installation

    Auger Gearbox Service INSTALLATION Installation of the auger assembly into the auger housing can be done whether the auger housing and traction assemblies are connected or not. There is no significant time savings to either sequence. All self-aligning bearings (sometimes called the flange bearings) MUST be installed loosely.

  • Page 15: Auger Gearbox Disassembly / Service

    Auger Gearbox Service AUGER GEARBOX DISASSEMBLY / SERVICE Once the auger gearbox assembly is removed from the housing the repair process is the same for all models. The only variables are what type of lubricant is used (see the chart on Introduction page 1), whether the Figure 23 2773-055/2773-066 impeller is removable from the shaft (on some models...
  • Page 16 Auger Gearbox Service Clean the output shaft and slide the case halves Returning to the impeller shaft, the 824XL models off. Remove the seals from the case halves and have a worm that is actually rolled into the impeller discard the seals. shaft.

  • Page 17: Failure Analysis

    Auger Gearbox Service Failure Analysis GEARBOX ASSEMBLY There are some misconceptions regarding these Use a wire brush or sandpaper to clean the auger gearboxes that result in incorrectly identifying the shaft. A clean, smooth shaft will help avoid causes of failure. damage when installing new bushings and seals.
  • Page 18 Auger Gearbox Service Insert the keys into the shaft and slide the large worm gear into place. Note: There is a large letter “R” and an arrow on one side of the gear. This gear MUST be installed such that the R and the arrow are on the right hand side and the arrow is pointing forward (Figure 30).
  • Page 19 The 824XL seals in a different manner. The mating surfaces must be clean and dry. Then a thin coat of Hylomar (Toro PN 505-129) is applied to BOTH halves. Allow it to cure until it is dull and tacky, 15 minutes or so, then assemble.
  • Page 20 THIS PAGE INTENTIONALLY LEFT BLANK 1 - 12 Two Stage Snowthrower Drive Systems Manual...

  • Page 21: Belts, Controls And Linkages

    Chapter 2 — Belts, Controls and Linkages INTRODUCTION All models use two belts. One to drive the auger and a second to drive the traction system. The auger drive uses a combination idler and brake to engage the belt for driving and to disengage the belt and apply the brake for stopping.

  • Page 22: Replacing The Traction Belt

    Slide idler arm and pulley assembly against belt to remove belt slack and tighten capscrews. Replacing the Traction Belt — Toro Note: Tension belt only enough to remove slack. Models 38065, 38080, 38085 Do not over-tension.

  • Page 23: Replacing The Traction Belt - Lawn-Boy Models 28230, 28231 And Toro Models 38051, 38052, 38054, 38056, 38062, 38063, 38064, 38072, 38073

    Replacing the Traction Belt — Lawn-Boy Tip the snowthrower forward and block it so it cannot fall. Models 28230, 28231 and Toro Models 38051, 38052, 38054, 38056, 38062, 38063, Remove the four screws that secure the bottom 38064, 38072, 38073 cover to the frame and remove the cover (Figure 41).
  • Page 24 Belts, Controls and Linkages Replacing the Traction Belt — 11. Install a new belt around the large traction pulley. Lawn-Boy Model 28232 and Toro Models 12. Loop the belt over the engine pulley, ensuring that 38053, 38066, 38078, 38083, 38084, 38086 the belt is on the inside of the belt guide (Figure 40).
  • Page 25 Belts, Controls and Linkages 13. Reinstall engine pulley sheave, washer, lock Loosen auger brake arm assembly by loosening rear screw and removing front screw (Figure 45). washer, and crankshaft screw. Make sure the indexing rib in the engine pulley sheave is aligned with the indexing notch in the center engine pulley (Figure 46).
  • Page 26 Belts, Controls and Linkages 15. Reinstall (2) screws that secure auger brake arm 17. Check and adjust auger drive linkage. Refer to assembly. Make sure tabs fit into holes in left side steps 5–7 of "Auger/Impeller Drive Control of machine (Figure 48). Linkage —...

  • Page 27: Control And Linkage Adjustment

    Loosen jam nut from clevis at bottom of auger drive control rod (Figure 52). Next, remove cotter Auger Control Adjustment — Toro Models pin and clevis pin holding clevis to bent rod. 38065, 38080, 38085 Install Auger Drive Control Rod Move auger drive control backward to DISENGAGE and hold it in that position.

  • Page 28: Auger/Impeller Drive Control Linkage

    Belts, Controls and Linkages Auger/Impeller Drive Control Linkage — Remove the belt cover (refer to "REPLACING THE AUGER/IMPELLER DRIVE BELT", All Other Models page 2 - 1, steps 1-2). Compress the auger/ impeller control lever and check that the slack is There are two adjustment mechanisms used.

  • Page 29: Adjusting Traction Control

    N and 1 (Figure 58). Hold wheel drive control lever in this position — on hump. Adjusting the Traction Control — Toro Models 38065, 38080, 38085 Note: Lever must be held against the hump, not in the N or 1 position.

  • Page 30: Adjusting The Traction Control - 824Xl (Toro Models 38066, 38078, 38083, 38084, 38086 And Lawn-Boy Model 28232)

    Belts, Controls and Linkages Adjusting the Traction Control — 824XL (Toro Models 38066, 38078, 38083, 38084, 38086 and Lawn-Boy Model 28232) Slide spring onto bottom of traction control rod (Figure 59). Figure 61 M-2628 Traction control lever Approximately Handgrip 5 inches (13 cm) 3-4 inches (8-10 cm) Move speed selector (Figure 60) into fifth gear.

  • Page 31: Adjusting The Traction Rod

    ADJUSTING THE TRACTION ROD — Tighten the two flange nuts finger tight. LAWN-BOY MODELS 28230, 28231 AND Move the speed selector (Figure 64) into third TORO MODELS 38051, 38052, 38054, gear. 38056, 38062, 38063, 38064 Note: If the speed selector does not move into...

  • Page 32: Adjusting The Speed Selector

    Belts, Controls and Linkages ADJUSTING THE SPEED SELECTOR If the snowthrower is slow, the No.1 speed selection has no speed, or the speed selector does not move into the No. 3 speed selection, adjust the speed selector linkage. Disconnect the wire from the spark plug and make sure that the wire does not contact the spark plug.

  • Page 33: Traction Drive Systems

    Chapter 3 — Traction Drive Systems INTRODUCTION All models use some variation of a friction drive. The engine drives a belt, which causes a drive plate(s) to rotate. As this belt is constantly tensioned, the belt and drive plate turn whenever the engine is running (Figure 67).

  • Page 34: Troubleshooting The Traction Drive - All Models

    Clean with alcohol or something that does not leave a residue. Replace the friction wheel if worn. DISASSEMBLY — TORO MODELS 38065, 38080, 38085 These models work as previously described in the Figure 72...
  • Page 35 Traction Drive Systems The axle can now be removed from the chassis. 10. The pivot shaft, which contains the friction wheel, Inspect the gear, the roll pin, and the areas where is retained by two shoulder bolts. They pass the bearings contact the axle for damage or through the side plate, into the ends of the shaft.

  • Page 36: Assembly - Toro Models 38065

    Traction Drive Systems ASSEMBLY — TORO MODELS 38065, E. If the eyebolt, or traction drive hub is to be replaced, remove the snap ring on the hub 38080, 38085 (Figure 78). Preparation 14. Before assembling something with a new bushing, wipe the bushing with a clean shop towel.

  • Page 37: Assembly

    Traction Drive Systems Assembly Slide the pillow block bearing, reverse plate (with the hub side away from the pulley), thrust washer, bearing (hub side facing the reverse plate), thrust washer, and spacer onto the drive shaft. Drive the roll pin through the spacer and shaft. Secure the reverse plate with the cap screw and locknut (Figure 80).
  • Page 38 Traction Drive Systems If the pivot assembly was repaired, now is the time F. Hook the long end of the spring in the hole in to assemble it. the left front corner of the frame (Figure 84). A. Secure the friction wheel to the hub with four cap screws and locknuts.

  • Page 39: Disassembly - Lawn-Boy Models 28230

    DISASSEMBLY — LAWN-BOY MODELS Next, tension the pivot assembly. With the unit upright, use a screwdriver to stretch the traction 28230, 23231 AND TORO MODELS 38051, spring and hook it into the hole provided 38052, 38054, 38056, 38062, 38063, 38064, (Figure 86).
  • Page 40 Traction Drive Systems Remove 4 self-tapping screws that secure the To remove the traction engagement assembly, axle bearings to the traction frame. Lift the axle remove the retaining ring on the left side of the and bearings out (Figure 89). Slide the bearings frame.
  • Page 41 Traction Drive Systems 11. If it is necessary to remove the gear quadrant, it is 16. To remove the front frame, pulley, and drive plate best to just remove the two self-tapping screws assembly, remove the two shoulder bolts that the that secure the gear quadrant mount to the frame pivots on.

  • Page 42: 23231 And Toro Models 38051, 38052

    Traction Drive Systems ASSEMBLY — LAWN-BOY MODELS 28230, Assembly Steps 23231 AND TORO MODELS 38051, 38052, 38054, 38056, 38062, 38063, 38064, 38072, Assemble the hub to the front frame using 4 screws. 38073 Install the snap ring onto the pulley and shaft.
  • Page 43 Traction Drive Systems Install the friction plate spring into the front frame Lightly oil the hex shaft. Insert the hex shaft from assembly. Note some models just have a hole in the left side, non-threaded end first. Slip the shaft the frame.
  • Page 44 Traction Drive Systems 11. Slide the wheel and hub on the hex shaft with the friction wheel closest to the sliding bracket. Install the locknut, holding the hex shaft with an open- end wrench (Figure 104). Figure 106 MVC-866 15. Connect spring to hole in front of pivot assembly (Figure 107).
  • Page 45 Traction Drive Systems 17. Install the friction wheel and sliding bracket. The 19. Install a thrust washer and bearing on each end of friction wheel should be on your left (Figure 109). the axle. Locate the holes and secure the axle bearings to the frame (Figure 111).

  • Page 46: Disassembly - Toro Models 38066, 38078, 38083, 38084, 38086

    23. See "Auger/Impeller Drive Control Linkage — All Other Models" on page 2 - 8 and "ADJUSTING THE TRACTION ROD — LAWN-BOY MODELS 28230, 28231 AND TORO MODELS 38051, 38052, 38054, 38056, 38062, 38063, 38064" on page 2 - 11 to make all final linkage adjustments.
  • Page 47 (Figure 117). Refer to "Replacing the Traction Belt — Lawn-Boy Model 28232 and Toro Models 38053, 38066, 38078, 38083, 38084, 38086" on page 2 - 4. 10. Disconnect the traction engagement rod (left front corner) from the bell crank (Figure 118).

  • Page 48: Assembly - Toro Models 38066, 38078, 38083, 38084, 38086

    Traction Drive Systems ASSEMBLY — TORO MODELS 38066, When installing the traction shaft and friction wheel, the bearings must be aligned. Loosely 38078, 38083, 38084, 38086 install the assembly into the chassis. Rotate the friction wheel and firmly strike each bearing a Reverse the process for assembly.

  • Page 49: Sub Assembly Repair

    Traction Drive Systems SUB ASSEMBLY REPAIR — TORO MODELS 38066, 38078, 38083, 38084, 38086 This section will cover the disassembly and repair of the traction shaft/friction wheel and the axle and friction plate assembly after they have been removed from the chassis.

  • Page 50: Assembly

    Traction Drive Systems Axle and Friction Plate Disassembly There are 2 versions of the hub and slider. The early models use a normal thrust washer on either side of the slider. Later models use a thrust The pulley and shaft go through the bearing hub washer with an internal key that fits into a keyway and the drive plate screws on.

  • Page 51: Axle And Friction Plate Assembly

    Traction Drive Systems Axle and Friction Plate Assembly Remember the threads on the pulley and shaft and the drive plate are left hand. Tighten firmly. Assemble in reverse order. The following are notes to Install the bearings on the friction plate frame. Do assist you: not tighten yet.
  • Page 52 THIS PAGE INTENTIONALLY LEFT BLANK 3 - 20 Two Stage Snowthrower Drive Systems Manual...
  • Page 53 THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 54 492-4738...

This manual is also suitable for:

Lawn-boy 522rLawn-boy 824eLawn-boy 522Lawn-boy 521Lawn-boy 622Lawn-boy 624 ... Show all

Table of Contents