561M Pipelayer Caterpillar


Idlers (Track)

Usage:

561M 1KW



Illustration 1g00102298

End play (clearance) of the idler shaft:

Minimum ... 0.25 mm (0.010 inch)
Maximum ... 1.25 mm (0.033 inch)

(1) Clearance across the diameter between the shaft and new bearings ... 0.366 ± 0.11 mm (0.014 ± 0.004 inch)

(2) Idler Tread

Diameter of the idler tread for the LGP undercarriage and the front idler on the XL undercarriage (new idler) ... 500 ± 0.5 mm (19.7 ± 0.02 inch)
Diameter of idler tread that is worn 100 percent ... 482 mm (19.0 inch)
Diameter of the idler tread for the rear idler on the XL undercarriage (new idler) ... 475 ± 0.5 mm (18.7 ± 0.02 inch)
Diameter of idler tread that is worn 100 percent ... 457 mm (18.0 inch)

(3) Torque for bolts that hold the track idler to the track roller frame ... 270 ± 40 N·m (200 ± 30 lb ft)

(4) Bearing depth from the end of the idler ... 20 ± 0.5 mm (0.79 ± 0.02 inch)

(5) Torque for bolts ... 55 ± 10 N·m (40 ± 7 lb ft)

Note: Rubber toric seals must be clean and dry at assembly. All surfaces that contact the toric seals must be clean and dry at assembly. At assembly, apply a thin film of oil to the contacting surfaces of the metal seal. Seal rings must be assembled squarely with the bore. The toric ring must not bulge and the toric ring must not be twisted.

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