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Manual de usuario Troy-Bilt, modelo 12071-8HP

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Set the handlebar base and bolt aside on a clean surface. The bolt hole in the top of the transmission is the gear oil fill hole. See Figure 5-9. 3. Slowly pour gear oil through a clean funnel into the transmission. Stop when gear oil begins to flow from the oil level check hole on the left side of the transmission (Figure 5-7). 4. Reinstall the oil level check plug. Tighten it securely. 5. Reinstall the handlebars using the mounting bolt previously removed. Align the handlebars so they point straight backwards, not at an angle. Then tighten the mounting bolt securely. 6. Reconnect the Forward Interlock wire harness to the receptacle. Be certain it’s secure. 7. Test operation of the Forward Interlock Safety System — refer to Section 4 for procedure. To Drain and Fill the Power Unit Transmission: 1. Place a shallow pan under the transmission gear oil drain plug (refer to B, Figure 5-9). 2. Remove the oil level check plug (see Figure 5-7) with a 3/8" wrench. This vents the transmission for faster oil draining. 3. Using the 3/8" wrench, remove the drain plug (B, Figure 5-9). The gear oil will drain quite slowly since it is thick. After about two quarts have drained, tilt the tiller forward so any oil at the rear of the transmission will drain out. 4. Clean the drain plug threads, put non-hardening gasket sealant on the threads, and reinstall plug. 5. Refill the transmission with the correct amount of gear oil before operating the tiller again. When oil seeps from the oil level check hole, the right amount of gear oil has been added. Replace all plugs. To Add Gear Oil to the Tine Attachment Transmission: 1. Select the right depth regulator lever setting: a) If filling an empty transmission, raise the Depth Regulator Lever so tines are on the ground. b) If topping off the gear oil, move Depth Regulator Lever down to engage its top notch. 2. Remove dipstick from tine attachment (see Figure 5-8). 3. Slowly add gear oil in the dipstick hole. Add 1/2-ounce at a time to avoid overfilling. It takes about 12-'/2 ounces. 4. Take dipstick readings frequently. Stop when oil reaches “Cold” range marking on dipstick. Replace dipstick securely. 48 Maintenu '■.' e " : ssbss To Drain and Fill the Tine Attachment Transmission: 1. The tine attachment transmission is not equipped with an oil drain plug. To drain just a small amount of gear oil, remove the dipstick and tilt the attachment forward (first uncoupling it from the Power Unit). 2. For complete drainage, remove the left-side tine assembly (refer to Bolo Tine Maintenance for instructions), then remove just one of the lower screws from the tiller housing cover (Photo 5-10). To speed drainage, remove the tine attachment dipstick to vent transmission. Photo 5-10: Remove housing cover screw to drain tine attachment transmission gear oil. Note: If you find a plastic washer on the cover screw you remove, discard the washer. There is no need to install a replacement washer. 3. Once all gear oil has drained, reinstall the housing cover screw securely (first coat its threads with non-hardening gasket sealant). 4. Be certain to refill the transmission with the correct amount of gear oil before operating the tiller again. DRIVE BELT MAINTENANCE A WARNING To help avoid personal Injury, stop the engine, wait for all moving parts to come to a complete stop, remove the electric start key, disconnect the spark plug wire and move the wire away from the spark plug, and let the engine and muffler cool before inspecting, adjusting or replacing the drive belt. m iip ¡¡il » A. Measuring and Adjusting Drive Belt Tension On a new tiller (or if a new belt is installed), the belt tension will probably need to be adjusted after the first two (2) hours of operation. Thereafter, check belt tension every ten (10) operating hours. Maintaining the right tension is important to good tiller performance and long belt life. If too loose, the belt will slip on the pulleys, and be unable to deliver full power to the wheels and tines. A loose belt will also wear prematurely. While checking belt tension, also inspect the belt for cuts, cracks, deterioration, etc. Don’t continue using a belt that isn’t in good shape. You’re sacrificing tiller performance by doing so. Tips on keeping the drive belt in top condition include: • Always put the Wheels/Tines/ PTO Drive Lever in NEUTRAL when the tiller is not in use. • Keep tension adjusted correctly. • Don’t “speed shift” when moving the Wheels/Tines/PTO Drive Lever between FORWARD and REVERSE. How to Measure Belt Tension: 1. Before taking a measurement, be sure the linkages and pivot points on the Wheels/Tines/PTO Drive Lever are clean and lubri- cated. If there is any binding, you won’t get true measurements. Also, you’ll need the belt adjustment tool you received with your new tiller (see Photo 5-11). 2. Move the Wheels/Tines/PTO Drive Lever fully down to the FORWARD position. The clutch roller at the bottom of the ...