Belt Mod Kit For Sky-Watcher HEQ5 Pro Belt Mod Kit for HEQ5 Take your HEQ5 Pro to the next level This kit replaces the HEQ5 Pro's spur gear drive train with timing belts. Reduces spur gear errors, which reduces tracking errors. Slewing is much quieter - the 'grinding' noise that regular spur gears produce is significantly reduced. The pulley ratio is the same as the factory gears so Sky Watcher SynScan hand controller functions are unaffected. All gain and no loss :-) HEQ5 Belt Kit comprises of: 2 x 47 tooth pulleys. 2 x 9 tooth pulleys. 2 x timing belts. 2 x 5mm mounting shafts. 2 x stainless steel washers WIth An extractor tool is available to easily remove the pinion gear from the motor. StarDikor Has Lots of Other Astronomy Accessories Your Looking For - See Our Best Sellers Below With Fast Shipping On Every Item Heq5Pro timing belt modification kit installation tutorial Self-provided installation tools : 2mm, 2.5mm, 3mm hex wrench, Phillips screwdriver(Accessories not included) Step 1 Use a Phillips screwdriver to remove the 6 screws on the gear cover and remove the gear cover. Step 2 Use a 3mm hexagon wrench to remove the three metal block fixing screws in the picture. Step 3 Use a 3mm hexagon wrench to remove the 3 motor fixing screws in the picture, and remove the metal block. Step 4 Take out the gear extractor that comes with the modification kit and insert it into the gear, as shown in the figure. Step 5 Align the gear puller screw with the motor shaft, and tighten the screw with a hex wrench to push the gear out. Step 6 Clean the motor shaft, install the small synchronous wheel on the motor shaft, and tighten the 4 screws with a 2mm hex wrench. Be careful not to use too much force when attaching the screws to avoid slippage. Just tighten it a little bit. Step 7 Use a 2.5mm hex wrench to loosen the two screws on the side of the motor holder in the picture (without removing it), remove the gear together with the bolt, and replace the copper ring washer under the gear with the stainless steel washer in the set. Step 8 Remove the gear, replace the tensioner, and install the bolt back, pay attention to the tensioner facing up. Use a 2.5mm hex wrench to tighten the red circle marking screws.Turn the tensioner by hand to see if it is smooth or not. If there is a caton, the bolt may be too tight. Loosen the screw and pull it out a little bit. Step 9 Loosen the two fixing screws of the large gear (marked with a red circle) with a 2.5mm hex wrench and remove the large gear. Clean the motor shaft and replace it with a large synchronous wheel. Step 10 Install the motor and the motor holder back into the gearbox, do not tighten the 6 screws first Step 11 Install the timing belt. Step 12 Step 13

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