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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. |
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| Illustration 1 | g00729263 |
Place the harvester head in the horizontal position.
Remove the saw chain before the saw bar is removed. See Operation and Maintenance Manual, "Saw Chain - Remove / Install" for information on removing the saw chain.
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| Illustration 2 | g00424158 |
(1) Block. (2) O-rings. (3) Saw bar. (4) Washer assembly. (5) Nuts. | |
The saw bar is held in place by two nuts (5) and two pins on block (1) .
- Remove two nuts (5). Remove washer assembly (4) .
- Inspect the condition of the pins and screws. Replace any broken pins or broken screws. Refer to Operation and Maintenance Manual, "Bar Guide Axle - Clean/Inspect/Replace" for information on replacing broken pins and screws. Inspect the condition of the saw bar. Refer to Operation and Maintenance Manual, "Saw Bar-Inspect" for information on inspecting the saw bar.
- Press the new saw bar over the pins that are on block (1). Be careful not to damage O-rings (2) .
- Install washer assembly (4) over the saw bar. Install the two nuts and O-rings. Tighten the two screws.
Aligning the Saw Bar with the Drive Sprocket
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| Illustration 3 | g00729329 |
(1) Block. (3) Saw Bar. (4) Washer assembly. (6) Drive Sprocket. (7) Saw Chain. | |
When the saw bar is installed, be sure that the saw bar is in proper alignment with the drive sprocket. The drive sprocket and the saw bar must match the travel of the saw chain. Otherwise, the saw chain may not stay on during operation. Install shims behind the drive sprocket, if necessary. See Disassembly and Assembly Manual, RENR3007, "Saw Motor and Chain Tensioner-Remove" for more information on removing the drive sprocket.
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| Illustration 4 | g00729331 |
Note: Install the drive sprocket correctly if the drive sprocket was removed. The holes for evacuation (8) in the drive sprocket should face away from the saw motor. The washer (9) should not cover the holes.
Drive Sprocket Bearing Adjustment
Adjust the play in the bearing when the drive sprocket is installed. Use the following procedures in order to adjust the play of the bearing.
- Tighten the nut (11) by using a spanner wrench.
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| Illustration 5 | g00729333 |
(6) Drive Sprocket. (10) Lock Plate. (11) Nut. | |
- Check the saw bar for side-to-side movement. Observe the movement between the hub of the saw motor and the saw bar tensioner. There should be no visible movement.
- After the nut has been tightened, bend a tab of the lock plate (10) into the groove of the nut (11) .