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| Illustration 1 | g00300411 |
Track roller frame (1) Track adjustment valves. (2) Cylinder assembly. (3) Piston. (4) Sleeve. (5) Retainer. (6) Front roller frame. (7) Recoil spring. (8) Stop assembly. (9) Guide assembly. | |
The track roller frame can be separated into two sections. Front roller frame (6) has a large tube assembly. The front tube assembly contains track adjuster piston (3), recoil spring (7), and sleeve (4). A groove is machined in the outer diameter of sleeve (4). A large cover with a key is installed in the rear roller frame. After assembly, the key is in alignment with the groove. The key will prevent sleeve (4) from rotating inside the rear roller frame. However, the key allows sleeve (4) to slide inside the rear roller frame.
Track adjustment valves (1) are used for moving front roller frame (6) in order to adjust the track tension. Grease is pumped into the filler valve. The grease causes piston (3) to move to the right. Piston (3) applies pressure to stop assembly (8). This pressure causes front roller frame (6) to move to the right. The movement of front roller frame (6) tightens the track. Tension on the track is released by a relief valve.
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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. |
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The area inside cylinder assembly (2) at the left end of piston (3) is filled with grease. During recoil, front roller frame (6) moves to the left. This movement causes stop assembly (8), retainer (5), and piston (3) to also move left. Cylinder assembly (2) can not move to the left because cylinder assembly (2) is stopped by the rear roller frame. As piston (3) moves left, a large hydraulic force is produced in the oil chamber of cylinder assembly (2). This hydraulic force pushes sleeve (4) and guide assembly (9) to the right. This action compresses recoil spring (7).