GLK48 and GLK55 Grapple Caterpillar

Rotator Head Bolts - Replace

Usage:

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NOTICE

Rotate the grapple at least 10 complete revolutions per day, allowing hydraulic oil to completely flow through all lines.

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Illustration 1	g03876755
typical example

Position the work tool with the jaws in the open position on a flat surface. Refer to illustration 1 for the correct position.
Stop the engine of the host machine to prevent inadvertent movement of the work tool.
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Illustration 2 g03853341

typical example
Remove rotator head bolt (2) and the washer from upper head (1) of the rotator.
Clean the threaded bolt hole.
Clean the new rotator head bolt (2).

Coat the entire threaded area of the new rotator head bolt (2) with lock tight compound.

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Table 1
Static inspection torque
Sales model	Bolt size	Torque value
GLK48, GLK55	Outer/Upper Head Bolts M16x2	240 N·m (177 lb ft)
GLK48, GLK55	Inner/Lower Head Bolts M16x2	240 N·m (177 lb ft)

Install the new rotator head bolt (2) and the washer into upper head (1) of the rotator. Tighten the new rotator head bolt (2). Use appropriate tooling to apply the torque that is specified in table.
Note: Tighten two bolts 180° apart to specified torque. Tighten two bolts 180° apart and 90° apart from the first two bolts to specified torque. Follow the torquing procedure of cross torquing bolts until all bolts are torqued.
Place a mark on the new rotator head bolt (2) that was replaced. Indicating that the bolt has been replaced.
Repeat steps 3 through step 9 for all rotator head bolts (2) in upper head (1) of the rotator following the cross torquing sequence noted.
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Illustration 3 g06199664

Note: Replacement of inner bolts requires disassembly of grapple head.
Remove bolts (4) and (5) from both sides.
Remove cover (6) from both sides of lower head .
Remove rotator head bolt (7) and the washer on the inside lower head.
Clean the threaded bolt hole.
Clean the new rotator head bolt (7).
Coat the entire threaded area of the new rotator head bolt (7) with lock tight compound.
Install the new rotator head bolt (7) into the inside lower head. Tighten the new rotator head bolt (7). Use appropriate tooling to apply the torque that is specified in table.
Note: Tighten two bolts 180° apart to specified torque. Tighten two bolts 180° apart and 90° apart from the first two bolts to specified torque. Follow the torquing procedure of cross torquing bolts until all bolts are torqued.
Place a mark on the new rotator head bolt (7) that was replaced. Indicating that the bolt has been replaced. Move onto the next rotator head bolt (7).
Repeat steps 13 through step 18 for all rotator head bolts (7) on the inside lower head.
Install cover (6). Install bolts (4) ( 5). Install the cover assemblies on both sides of lower head.