LEFT TRACK RUBS FRAME ON SOME 247B AND 257B MULTI TERRAIN LOADERS [TIBU4384]

UNDERCARRIAGE

TENSIONER GP-TRACK

LEFT TRACK RUBS FRAME ON SOME 247B AND 257B MULTI TERRAIN LOADERS

CONFIDENTIAL TIBU4384

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TECHNICAL INFORMATION BULLETIN	OCTOBER 20, 2004
MULTI TERRAIN LOADER	247B (MTL1-UP), 257B (SLK1-UP) MULTI TERRAIN LOADERS
	Component Code(s) 4150 4197 4198

SUBJECT: LEFT TRACK RUBS FRAME ON SOME 247B AND 257B MULTI TERRAIN LOADERS

PROBLEM:

The left track may rub the frame on some 247B and 257B Multi Terrain Loaders when the machine is traveling in reverse.

SOLUTION:

Investigation is currently underway to determine the root cause of this problem. Until a solution is found, rotating one end of the tensioner may alleviate the problem. Apparently, dimensional differences in the tube portion of the tensioner can affect the drive table orientation, thus affecting the clearance between the track and the frame.

In order to rotate one end of the tensioner, perform the following steps:

Adjust tensioner (2) in order to detension the track and alleviate the pressure on the tensioner. See Figure 1.

Disconnect one end of tensioner (2) by removing the appropriate bolt and hardware.
Rotate the shaft assembly (P/N 210-4640 (1) or 210-4641 (3)) by 180? in either direction.
Reconnect the end of tensioner (2) with the bolt and hardware that were previously removed. Tighten the bolt to a torque of 370 ? 50 N?m (273 ? 37 lb ft).
Readjust tensioner (2) for the proper track tension. Refer to Operation and Maintenance Manual, SEBU7732, "Track Adjustment for the 247B and 257B".
Check the track to ensure the track does not rub the frame when operating in reverse or in forward. If the track still rubs the frame, call Dave L. Johnson (919-777-2379) or Bryan C. Cherry (919-777-2135) in the SSL/MTL Product Group at BCP Sanford, NC.