GEAR 2F7651 - Caterpillar

Accidental machine starting can cause injury or death to personnel working on the machine.To avoid accidental machine starting, turn the battery disconnect switch to the OFF position and remove the key. If the machine is not equipped with a battery disconnect switch, disconnect the battery cables from the battery and tape the battery clamps.Place a do not operate tag at the battery disconnect switch location to inform personnel that the machine is being worked on.
Remove any dirt or debris that may have accumulated on the disc saw.
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Place wood blocks at suitable locations under the felling head. The blocks should be placed on level ground. The blocks should provide a large base for support. Use only wood blocks which will support the weight of the felling head.
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Once the wood blocks are in place, slowly lower the felling head until the felling head is fully supported by the wood blocks. Note: The felling head must be blocked to a suitable height off the ground in order to allow a lifting device below the disc saw.Make sure that the felling head is stable before you proceed.
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Rotate the blade at least three full revolutions in order to properly seat the top tapered roller bearing.
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Insert the locking pin in order to restrict additional rotation of the blade.
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Place a dial indicator on the blade through the 12.7 mm (0.5 inch) inspection opening on the plate. Set the dial to 0 or note the dial's position.
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Place a lifting device so that the lifting device is located directly below the output shaft.
Place a block on the lifting device in order to help support and protect the output shaft. The output shaft should rest fully on the block and on the lifting device.
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Raise the lifting device in order to apply an upward force on the output shaft. Note the reading on the dial indicator. If the motion of the output shaft is greater than the maximum of 0.23 mm (0.009 inch), adjustment is required. Note: Do not operate the felling head before you measure the motion of the output shaft. The felling head must be cold when you measure the motion of the output shaft.
If the motion of the output shaft exceeds the specification, refer to the Disassembly and Assembly, "Output Shaft - Install" in order to adjust the output shaft end play.
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If the motion of the output shaft is within the given specification, lower the lifting device. Remove the lifting device from below the felling head. Note: Do not forget to remove the dial indicator before returning the felling head back to operation.
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Remove the locking pin in order to allow the blade to rotate. Note: Damage to the work tool or damage to the machine can occur if the locking pin is not removed before returning the felling head back to operation.