BOLT 1621497 - Caterpillar

Removal Procedure
Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     8S-7611     Tube Assembly     2    
8S-7615 Pin     2    
8S-7640 Stand     2    
B     183-4797     Track Roller Lifting Fork     1    Note: There is a track guide on each side of the machine. The procedure that follows is for the removal of the track roller with the track guide.
Start the engine. Park the machine on a hard, level surface. Stop the engine.
Personal injury or death can result from grease and oil coming out of the relief valve.Grease and oil are under high pressure coming out of the relief valve and can penetrate the body.Do not watch the relief valve to see if grease is escaping. Watch the track or track adjustment cylinder to see if the track is being loosened. Make sure the vent holes are clean before the tension is released on the track.
Release the tension on the track assembly. Refer to Operation and Maintenance Manual, "Track Adjustment - Adjust" for more information.
Illustration 1 g00489826
Note: Adjust the height of Tooling (A) in order to have sufficient clearance for the removal of the track rollers.
Lift the side of the machine. Install Tooling (A) under the undercarriage.
Illustration 2 g00897781
Loosen bolts (1) that hold the track guide to the undercarriage.Note: Do not remove bolts (1) at this time.
Remove bolts (2) .
Illustration 3 g00898143
Attach a suitable lifting device to the track guide. The weight of the track guide is approximately 68 kg (150 lb). Remove bolts (1) .
Repeat Step 4 through Step 6, as required.
Illustration 4 g00898231
Loosen bolts (4) that secure track roller (3) to the undercarriage.Note: Do not remove bolts (4) at this time.
Illustration 5 g00898146
Fasten a suitable lifting device and a lifting sling to Tooling (B) .
Put Tooling (B) in position under track roller (3) .
Remove bolts (4) that secure the track roller. Remove the track roller. The weight of the track roller is approximately 45 kg (100 lb).