HOSE AS 3904569 - Caterpillar

Procedure
Grease is under high pressure.Grease coming out of the relief valve under pressure can penetrate the body causing injury or death.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.Loosen the relief valve only one turn.
Move the machine forward. Allow the machine to stop without the use of the service brakes. Adjust the tracks while you are in the typical operating conditions of the machine. If packing conditions prevail on the workplace, the tracks should be adjusted with packing material.
Illustration 1 g00040329
If a machine does not have carrier rollers, the sag in the track is measured between the sprocket and front idler (2).
Illustration 2 g00104000
If the machine is equipped with a carrier roller, calculate the average of dimension (3) and dimension (4) .Standard Track
Table 1
Track Sag for Standard Track    
    Minimum     Target     Maximum    
No Carrier Roller (2)    
105 mm (4.1 inch)    
115 mm (4.5 inch)    
125 mm (4.9 inch)    
Carrier Roller (3) and (4)    
55 mm (2.2 inch)    
65 mm (2.6 inch)    
75 mm (3 inch)    SystemOne Track
Table 2
Track Sag for SystemOne Track    
No Carrier Roller (2)     Carrier Roller (3) and (4)    
115 10 mm (4.5 0.4 inch)    
65 10 mm (2.6 0.4 inch)    
If the tractor is used in a sprocket jump application
100 10 mm (4.0 0.4 inch)     If the tractor is used in a sprocket jump application
60 10 mm (2.4 0.4 inch)    
If the tractor is used in a severe sprocket jump application
90 10 mm (3.5 0.4 inch)     If the tractor is used in a severe sprocket jump application
55 10 mm (2.2 0.4 inch)    Loose Track Adjustment
Illustration 3 g00680166
Do not attempt to tighten track when dimension (1) is 152 mm (6.0 inch) or more.Contact your Caterpillar dealer for track service or instructions.
Remove the access cover.
Illustration 4 g00689385
Add multipurpose grease (MPGM) through track adjustment valve (5). Add the MPGM until dimension (2) is correct.
Operate the machine back and forth in order to equalize the pressure. Allow the machine to coast to a complete stop. Do not use the brakes.
Remeasure dimension (2). If dimension (2) is less than 115 10 mm (4.5