- 1. Check the track chain tension.
- 2. Check the track pads.
Lubricate those points shown in the service chart.
Checking The Track Chain Tension
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INADVERTENT ENGAGEMENT OF THE TRACK DRIVE SYSTEM COULD CAUSE PERSONAL INJURY. SHUT THE ENGINE DOWN AND REMOVE THE KEY FROM THE IGNITION SWITCH. |
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For new tracks:
- 1. Loosen the jam nuts on the adjusting bolts, then turn the adjusting bolts alternately and evenly until the tensioning spring begins to compress.
- 2. Loosen the adjusting bolts alternately and evenly until the sprocket moves back 1/4 inch (6.4 mm).
- 3. Hold the adjusting bolts and tighten the jam nuts.
For tracks with more than 40 hours of operation.
- 1. With the engine running and the park brake control at "On", raise the mainframe and block the mainframe up at the track to be checked.
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IF THE MAINFRAME IS NOT ADEQUATELY BLOCKED UP, IT COULD FALL AND CAUSE PERSONAL INJURY WHEN THE TRACK IS RAISED. SECURELY BLOCK UP THE MAINFRAME. IF A HOSE OR CYLINDER FAILS WHEN THE TRACK ASSEMBLY IS RAISED OFF THE GROUND, THE TRACK ASSEMBLY COULD FALL AND CAUSE A PERSONAL INJURY. SECURELY BLOCK UP THE TRACK ASSEMBLY. |
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- 2. Raise the track off the ground by holding the elevation control for the leg at "DN" (Down), then SHUT THE ENGINE DOWN.
- 3. Hold the straightedge across the tread faces of the two center rollers, then measure from the straightedge to the contact face of the center chain link. The measurement should be between 3 and 3 1/2 inches (7.6 to 8.9 cm).
- 4. If the measurement is not correct, loosen the jam nuts on the adjusting bolts, then turn the adjusting bolts alternately and evenly to obtain the correct measurement. Hold the adjusting bolts and tighten the jam nuts.
- 5. Start the engine, hold the elevation control for the leg at "Up" to lower the track, then remove the blocks from under the mainframe.
Checking The Track Pads
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INADVERTENT ENGAGEMENT OF THE TRACK DRIVE SYSTEM COULD CAUSE PERSONAL INJURY. SHUT THE ENGINE DOWN AND REMOVE THE KEY FROM THE IGNITION SWITCH. |
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Check for any broken or bent track pads and replace any found. Operating the machine with broken or bent pads will overload the chain and damage it. Tighten all pad mounting bolts with a torque wrench. If the nuts and bolts are dry and unlubricated, tighten them to a torque of 200 to 250 lb-ft (273 to 341 Nm). IF THE NUTS AND BOLTS HAVE GREASE OR OIL ON THEM, TIGHTEN THEM ONLY TO 165 TO 200 LB-FT (225 TO 273 Nm).