Page 2 - Table of Contents – Page 2 of 2; TRACTION DRIVE SYSTEMS - CONTINUED
TORO /LAWN-BOY TWO STAGE SNOWTHROWER DRIVE SYSTEMS MANUAL Table of Contents – Page 2 of 2 TRACTION DRIVE SYSTEMS - CONTINUED DISASSEMBLY LAWN-BOY MODELS 28230, 23231TORO MODELS 38051, 38052, 38054, 38056, 38062, 38063, 38064, 38072, 38073 ASSEMBLY LAWN-BOY MODELS 28230, 23231TORO MODELS 38051, 38052...
Page 4 - About This Manual; Copyright© - All Rights Reserved
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. This ...
Page 5 - Two Stage Snowthrower Drive Systems Manual; Contents
Two Stage Snowthrower Drive Systems Manual Contents AUGER GEARBOX SERVICE . . . . . . . . . . . . . 1-1 GENERAL INFORMATION . . . . . . . . . . . . . . . . 1-1 AUGER GEARBOX LUBRICANT . . . . . . . . . . . 1-1 GEARBOX REMOVAL . . . . . . . . . . . . . . . . . . . 1-1 Primary Method — Minimum Disasse...
Page 6 - THIS PAGE INTENTIONALLY LEFT BLANK
Two Stage Snowthrower Drive Systems Manual THIS PAGE INTENTIONALLY LEFT BLANK
Page 7 - Introduction; Model
Two Stage Snowthrower Drive Systems Manual Introduction - 1 Introduction This manual will cover service to the auger and traction drive systems on small and intermediate frame 2 stage snowthrowers. Service information for Power Shift snowthrowers is contained in manual 492-0354. The models covered a...
Page 9 - Chapter 1 — Auger Gearbox Service; GENERAL INFORMATION; Figure 1; GEARBOX REMOVAL
Two Stage Snowthrower Drive Systems Manual 1 - 1 Chapter 1 — Auger Gearbox Service GENERAL INFORMATION The manual takes a systems approach. There are two versions of the auger gearbox and three versions of the traction drive system used among the various 2-stage models. For information on the auger ...
Page 10 - Auger Gearbox Service; Primary Method — Minimum Disassembly; The following steps apply to all models.
Auger Gearbox Service 1 - 2 Two Stage Snowthrower Drive Systems Manual Primary Method — Minimum Disassembly The following steps apply to all models. 1. Remove the belt cover. Loosen the belt guide on the engine crankshaft and remove the auger belt. DO NOT bend the belt guide out of the way (Figure 3...
Page 11 - Figure 7; Begin to pull the auger assembly out to the front.; Figure 8
Two Stage Snowthrower Drive Systems Manual 1 - 3 Auger Gearbox Service 5. Loosen the rear and remove the front capscrew securing the idler arm to the chassis. Figure 7 M-3331 6. Begin to pull the auger assembly out to the front. Note: The auger pulley and key have not yet been removed. However, if y...
Page 14 - INSTALLATION
Auger Gearbox Service 1 - 6 Two Stage Snowthrower Drive Systems Manual 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. 1. All self-align...
Page 15 - Auger gearbox disassembly:
Two Stage Snowthrower Drive Systems Manual 1 - 7 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 p...
Page 16 - Now inspect the worm and worm gear. If either
Auger Gearbox Service 1 - 8 Two Stage Snowthrower Drive Systems Manual 6. Clean the output shaft and slide the case halves off. Remove the seals from the case halves and discard the seals. 7. Clean and inspect the bushings in the case halves. If they are damaged or worn, press them out of the case h...
Page 17 - Failure Analysis
Two Stage Snowthrower Drive Systems Manual 1 - 9 Auger Gearbox Service Failure Analysis There are some misconceptions regarding these gearboxes that result in incorrectly identifying the causes of failure. The square cut ring on the impeller shaft is not really a seal. It is a wiper ring that has a ...
Page 18 - There is a large letter
Auger Gearbox Service 1 - 10 Two Stage Snowthrower Drive Systems Manual 3. 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 ...
Page 19 - Some models have 8 gear case screws
Two Stage Snowthrower Drive Systems Manual 1 - 11 Auger Gearbox Service 7. Apply a VERY light coat of Loctite™ Blue #242 or quivalent to the outer diameter of the bearing. Loctite™ should not squeeze out when everything is tightened (Figure 33). Figure 33 2773-059 8. Some models use a gasket and som...
Page 21 - Chapter 2 — Belts, Controls and Linkages; INTRODUCTION; Turn the engine off and disengage all controls.
Two Stage Snowthrower Drive Systems Manual 2 - 1 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 be...
Page 22 - Belts, Controls and Linkages; REPLACING THE TRACTION BELT; Tension belt only enough to remove slack.
Belts, Controls and Linkages 2 - 2 Two Stage Snowthrower Drive Systems Manual 7. The belt guide must be checked and adjusted. With the engine off, engage both the auger and traction controls. Adjust the belt guide so that there is approximately 1/8 inch (.3 cm) clearance between the belt guide and t...
Page 23 - Drain the gasoline from fuel tank.; CAUTION
Two Stage Snowthrower Drive Systems Manual 2 - 3 Belts, Controls and Linkages Replacing the Traction Belt — Lawn-Boy Models 28230, 28231 and Toro Models 38051, 38052, 38054, 38056, 38062, 38063, 38064, 38072, 38073 When the traction drive belt becomes worn, stretched, oil-soaked, or otherwise damage...
Page 25 - Pull traction idler pulley outward and install new
Two Stage Snowthrower Drive Systems Manual 2 - 5 Belts, Controls and Linkages 3. Loosen auger brake arm assembly by loosening rear screw and removing front screw (Figure 45). Figure 45 M-2678 4. Remove idler pulley spring (Figure 45). Let brake arm assembly hang free but out of the way. 5. Remove (2...
Page 26 - While someone squeezes the auger/impeller; If the auger and; Refer
Belts, Controls and Linkages 2 - 6 Two Stage Snowthrower Drive Systems Manual 15. Reinstall (2) screws that secure auger brake arm assembly. Make sure tabs fit into holes in left side of machine (Figure 48). Figure 48 M-2678 16. While someone squeezes the auger/impeller control lever (Figure 49) aga...
Page 27 - CONTROL AND LINKAGE ADJUSTMENT; Before making any control adjustments, verify; Install Auger Drive Control Rod; Tighten the jam nut firmly against top of clevis.; Adjusting Auger/Impeller Drive Belt
Two Stage Snowthrower Drive Systems Manual 2 - 7 Belts, Controls and Linkages CONTROL AND LINKAGE ADJUSTMENT Note: Before making any control adjustments, verify that the handles are secured to the traction frame. If the handles move at all, the linkages will not maintain adjustment. Auger Control Ad...
Page 29 - ADJUSTING TRACTION CONTROL; Lever must be held against the hump, not in
Two Stage Snowthrower Drive Systems Manual 2 - 9 Belts, Controls and Linkages ADJUSTING TRACTION CONTROL Adjusting the Traction Control —Toro Models 38065, 38080, 38085 1. Move wheel drive control into No. 1, 1st gear. Position control lever so its front surface is 1/4 of an inch (6mm) from bottom o...
Page 31 - Tighten the two flange nuts finger tight.
Two Stage Snowthrower Drive Systems Manual 2 - 11 Belts, Controls and Linkages ADJUSTING THE TRACTION ROD — LAWN-BOY MODELS 28230, 28231 AND TORO MODELS 38051, 38052, 38054, 38056, 38062, 38063, 38064 1. Thread the locking flange nut (flange side up) onto the bottom of the traction control rod, belo...
Page 32 - ADJUSTING THE SPEED SELECTOR; The drive assembly should be 1/8 inch
Belts, Controls and Linkages 2 - 12 Two Stage Snowthrower Drive Systems Manual 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. 1. Disconnect the wire...
Page 33 - Chapter 3 — Traction Drive Systems
Two Stage Snowthrower Drive Systems Manual 3 - 1 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 engi...
Page 34 - Traction Drive Systems; Verify adjustment of traction drive linkage.
Traction Drive Systems 3 - 2 Two Stage Snowthrower Drive Systems Manual TROUBLESHOOTING THE TRACTION DRIVE — ALL MODELS Drive slipping: 1. Verify adjustment of traction drive linkage. 2. Make sure the engagement spring and idler spring are in place and undamaged. 3. Verify that the drive plate and f...
Page 36 - Preparation
Traction Drive Systems 3 - 4 Two Stage Snowthrower Drive Systems Manual E. If the eyebolt, or traction drive hub is to be replaced, remove the snap ring on the hub (Figure 78). Figure 78 2768-040 F. The small sprocket is retained to the hex shaft with a key and set screw. G. The large sprocket just ...
Page 37 - Assembly
Two Stage Snowthrower Drive Systems Manual 3 - 5 Traction Drive Systems Assembly 1. 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 t...
Page 39 - Drain the gasoline and oil.
Two Stage Snowthrower Drive Systems Manual 3 - 7 Traction Drive Systems 6. Next, tension the pivot assembly. With the unit upright, use a screwdriver to stretch the traction spring and hook it into the hole provided (Figure 86). Figure 86 MVC-714 7. Slip one thrust washer on each end of the axle and...
Page 40 - Disconnect the shift rod and traction drive rod.
Traction Drive Systems 3 - 8 Two Stage Snowthrower Drive Systems Manual 6. Remove 4 self-tapping screws that secure the axle bearings to the traction frame. Lift the axle and bearings out (Figure 89). Slide the bearings and thrust washers off the axle. Figure 89 2773-074 7. Disconnect the shift rod ...
Page 42 - Assembly Tips
Traction Drive Systems 3 - 10 Two Stage Snowthrower Drive Systems Manual ASSEMBLY — LAWN-BOY MODELS 28230, 23231 AND TORO MODELS 38051, 38052, 38054, 38056, 38062, 38063, 38064, 38072, 38073 Assembly Tips 1. Before assembling something with a new bushing, wipe the bushing with a clean shop towel. Th...
Page 43 - Assemble the friction wheel and hub using 4 self-
Two Stage Snowthrower Drive Systems Manual 3 - 11 Traction Drive Systems 5. Install the friction plate spring into the front frame assembly. Note some models just have a hole in the frame. Others have a tab bent outward to hook the spring into (Figure 100). Hook the lower end of the spring into the ...
Page 45 - Install the friction wheel and sliding bracket. The
Two Stage Snowthrower Drive Systems Manual 3 - 13 Traction Drive Systems 17. Install the friction wheel and sliding bracket. The friction wheel should be on your left (Figure 109). Figure 109 2773-081 The gear quadrant must be free to pivot. The first tooth on the quadrant should go into the hole in...
Page 46 - If the lower traction rod was removed, reinstall it
Traction Drive Systems 3 - 14 Two Stage Snowthrower Drive Systems Manual 21. If the lower traction rod was removed, reinstall it now. Slide the end through the traction bracket then install the spring and locknut. Turn the locknut on until the spring is compressed to approximately 2 ¼” (5.7 cm) long...
Page 47 - Disconnect the traction engagement rod (left front
Two Stage Snowthrower Drive Systems Manual 3 - 15 Traction Drive Systems 6. To remove the intermediate shaft, loosen the retaining bolts and remove the chain. Loctite™ Red #271 is used to secure these bolts. Remove the shaft (Figure 116). Figure 116 0054-009 7. To remove the axle and friction plate ...
Page 49 - Traction Shaft/Friction Wheel Disassembly
Two Stage Snowthrower Drive Systems Manual 3 - 17 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 fr...
Page 50 - The threads
Traction Drive Systems 3 - 18 Two Stage Snowthrower Drive Systems Manual 6. 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 washer with an internal key that fits into a keyway cut into the shaft portion o...
Page 51 - Axle and Friction Plate Assembly
Two Stage Snowthrower Drive Systems Manual 3 - 19 Traction Drive Systems Axle and Friction Plate Assembly Assemble in reverse order. The following are notes to assist you: 1. Install the snap ring into the grove in the pulley and shaft. The sharp edge of the snap ring should face the pulley. Install...
