Golf Course Management

MAR 2015

Golf Course Management magazine is dedicated to advancing the golf course superintendent profession and helping GCSAA members achieve career success.

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(shop) 34 GOLF COURSE MANAGEMENT 03.15 Scott R. Nesbitt A crankshaft repair sleeve is a sensible addition to any service job like a clutch replacement, or other service work involving an external oil seal. Photos by Scott Nesbitt Saving cranks and other shafts Oil oozing from the rear of an engine can be a destructive mess. A hydraulic motor drib - bling on the greens is a nightmare. There's a solution that can often solve these problems, with great savings in cost and labor time. The trick is installing a thin stainless steel sleeve on a shaft to provide a new smooth mat - ing surface for the oil seal. At bottom in the photo is the sleeve needed on a 15-year-old 2.5-liter gasoline engine's rear- main crankshaft oil seal. At top is the metal cup that is the installation tool. At left is the stan - dard-size oil seal that was installed after the sleeve was in place. The seal's fexible lips easily expand over the sleeve's 0.010-inch wall. About 30 extra minutes were needed to pull the fywheel and install the sleeve and seal while replacing the clutch. I install a shaft-saver sleeve for any seal that's exposed to the grit and grime of the open air, even on newer equip - ment. That includes engines, hydraulic pumps and motors, transmissions, axles and things like camshaft seals on engines with rubber timing belts. For $30 or less, it's cheap peace of mind. Besides making the shaft surface harder and smoother, the stainless steel re - sists corrosives. Some new engines come with wear sleeves. Any repair or wear sleeve is easily removed and replaced during service work. I like to use a 4-pound hard-face dead-blow hammer to install a sleeve. Go online to You - Tube to watch an expert do it by searching for "muscle car engines Ford 302 rear main sleeve." That bench job is a lot easier than working up - side down under a machine. Preparation breeds success. First, clean, clean, clean the shaft. Carb cleaner loos - ens deposits. Lightly polish with very fne emery cloth to knock down any burrs, then spray and wipe and air-blast. Now measure, measure, measure your existing shaft. And the repair sleeve. Don't trust the factory specs. Fac - tories make errors. Off-spec shafts and sleeves are not unknown. Before installation, I heat a sleeve (nestled in its installation cup) by setting it on a hot- air popcorn popper ($30 at big-box stores). The 1,250-watt heater brings the sleeve to about 170 F so it slightly expands. Properly sized sleeves are made to ft at normal room tempera - tures. I fnd the heating makes installation a bit easier when there's limited hammer-swing - ing room. A good equipment distributor can get the right sleeve for common engines, like Kubota diesels. Unless it's for a car or truck, don't expect an auto parts store to list sleeves for Perkins, Kohler, Kawasaki or other mod - ern turf engines, or an old tractor with an orphan engine. Stick with a large machine shop or industrial supply house, whether on - line or brick-and-mortar. You may wait a day or two, but patience pays off. Sleeves are available for nominal shaft sizes from ½ inch to 8 inches (12-200 mm), and are best selected from your real-world measure - ments. Download the catalog at binary/26-128020/11337_2-EN-SKF-Speedi- Sleeve.pdf . With the SKF catalog displayed in Adobe Reader, hold the CTRL and F keys at the same time to display the search box. Type in Speedi-Sleeve and click the NEXT button. You'll fnd info and instructions on Pages 4-7. Click the NEXT button again and fnd part numbers for sleeves in metric and U.S. dimensions. The SKF numbering system is used for Na - tional's "Redi-Sleeve" products, while National parent Timken adds a KWK prefx for its "KWIK-Sleeve" line. Canadian sleeve seller Daemar uses the SKF numbers, while Fel-Pro and Silver Seal use their own number system. So it goes. Corporate mergers in the bearing and seal business mean your sleeve may ar - rive in a box with a different brand name. As long as it's clean and the right size, focus on the measurements. If your original shaft has a nasty groove, mix some steel-reinforced epoxy (J-B Weld or other quality brand) and tap the sleeve on while the fller is still moist. And don't forget that on most sleeves the fange is only needed for in - stallation, and may need to be snapped off. Use common sense. And, by the way, that popcorn popper does a nice job drying arc welding rods to re - duce popping. Scott R. Nesbitt is a freelance writer and former GCSAA staff member. He lives in Cleveland, Ga. With 1,250 watts producing 170 F air, a popcorn popper makes a repair sleeve expand a wee bit, making installation a wee bit smoother.

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