g296783Figure 61. Jam nuts 3. Height-of-cut chain2. U-bolt7. Adjust the nuts (Figure 6) to raise or lower therear of the cutting unit so that the tips of the rearblades are 6 to 10 mm (1/4 to 3/8 inch) higherthan the front tips.8. Tighten the jam nuts.6Greasing the MachineNo Parts RequiredProcedureBefore operating the machine, it must be greasedto ensure proper lubricating characteristics; referto Greasing the Bearings and Bushings (page 18).Failure to properly grease the machine will result inpremature failure of critical parts.Product OverviewSpecificationsNote: Specifications and design are subject tochange without notice.Widthof Cut• Model No. 39190: 1.52 m (60 inches)• Model No. 31972: 1.82 m (72 inches)Heightof CutAdjustable from 25 to 152 mm (1 to 6 inches) in 13mm (1/2 inch) incrementsNetWeight• Model No. 31970: 204 kg (450 lb)• Model No. 31972: 238 kg (525 lb)Attachments/AccessoriesA selection of Toro approved attachments andaccessories is available for use with the machineto enhance and expand its capabilities. Contactyour Authorized Service Dealer or authorized Torodistributor or go to www.Toro.com for a list of allapproved attachments and accessories.To ensure optimum performance and continued safetycertification of the machine, use only genuine Tororeplacement parts and accessories. Replacementparts and accessories made by other manufacturerscould be dangerous, and such use could void theproduct warranty.11