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| Illustration 1 | g03715036 |
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Rear of Tractor (1) Screed lift cylinder | |
Screed lift cylinder (1) is located on each side of the tractor. The right side cylinder is shown.
Screed lift cylinders (1) lift and lower the screed.
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| Illustration 2 | g03715037 |
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Side of Tractor (2) Screed travel lock valve (3) Screed travel lock solenoid | |
Screed travel lock valve (2) and screed travel lock solenoid (3) are located on each side of the tractor. The right side screed travel lock valve is shown.
Screed travel lock valve (2) prevents the screed from being lowered. To lower the screed, screed travel lock solenoid (3) must be energized.
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| Illustration 3 | g03715038 |
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Rear of Tractor (4) Auger lift cylinder (5) Auger lift cylinder bypass | |
Auger lift cylinder (4) is located on each side of the tractor. The left cylinder is shown.
Auger lift cylinders (4) raise and lower the augers. The auger cylinders are connected in a series hydraulic circuit. The rod end of the left cylinder is connected to the head end of the right cylinder. The left cylinder has a slightly larger diameter than the right cylinder. This configuration allows the right and left augers to be raised and lowered at the same rate.
Each auger cylinder (4) is equipped with auger lift cylinder bypass (5). The bypass is located near the head end of the cylinder.
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| Illustration 4 | g03715459 |
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Cross Section of Auger Lift Cylinder (6) Rod (7) Ball (8) Spring | |
This cross-sectional view of auger lift cylinder (4) shows the cylinder components. Auger lift cylinder contains bypass valve (5) installed in the cylinder wall.
The auger cylinders retract as the augers are lifted. When a cylinder nears full retraction, oil in the head end of the cylinder acts against ball (7). The oil pressure overcomes the force from spring (8). In this case a passage is opened between the head end of the cylinder and the rod end of the cylinder. This feature allows the two auger lift cylinders to synchronize at the top of the cylinder strokes.
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| Illustration 5 | g03749973 |
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Side of Tractor (9) Tow point cylinder | |
Tow point cylinder (9) is located on each side of the tractor. The left side cylinder is shown.
Tow point cylinders (9) raise and lower the tow point. When the tow point is raised, the angle of attack of the screed is increased. When the tow point is lowered, the angle of attack of the screed is reduced.
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| Illustration 6 | g03715040 |
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Side of Tractor (10) Hopper cylinder (11) Hopper | |
Hopper cylinder (10) is located on each side of the tractor. The right side cylinder is shown.
Hopper cylinders (10) raise and lower hoppers (11).
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| Illustration 7 | g03715041 |
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Front of Tractor (12) Apron | |
The apron cylinders (not shown), if equipped, are located in the front of the tractor under apron (12).
Excess paving material on apron (12) is directed onto the drag conveyors when the apron is raised.
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| Illustration 8 | g03715045 |
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Front of Tractor (13) Push rollers (14) Housing (15) Truck hitch arms | |
The front of the tractor may be equipped with push roller assembly (13) or an optional truck hitch. The push rollers contact the rear wheels of a truck. These rollers allow the tractor to push a truck during the paving operation.
The truck hitch cylinders (not shown) are located inside housing (14) at the front of the tractor. The truck hitch cylinders control the movement of truck hitch arms (15). The truck hitch arms engage on the rear wheels of the truck and lock the paver and the truck together. This action ensures that the truck will not roll out of the paver during the unloading operation.