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| Illustration 1 | g03372837 |
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Hydraulic blade cylinder (typical example) (1) Head end port (2) Blade cylinder (3) Rod end port | |
The blade cylinder moves the blade up and down. When hydraulic fluids flows into head end port (1) of blade cylinder (2), the cylinder extends. This action causes the blade to perform a blade DOWN on the machine. When hydraulic fluid flows into rod end port (3) of blade cylinder (2), the cylinder retracts. This action causes the blade to perform a blade UP operation on the machine.
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| Illustration 2 | g03372836 |
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Cutaway view of blade cylinder (typical example) (1) Head end port (4) Locknut (5) Piston (6) Rod (7) Grease fitting (8) Cylinder body | |
Blade cylinder (2) is constructed of the following components:
- Locknut (4)
- Piston (5)
- Rod (6)
- Grease fittings (7)
- Cylinder body (8)
- Bearings
- Seals
Blade cylinder (2) has various seals to prevent the hydraulic fluid from leaking past piston (5).
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| Illustration 3 | g03372834 |
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Cylinder piston (typical example) (4) Locknut (5) Piston (9) Piston seal (10) Wear band | |
Wear bands (10) prevent piston (5) from touching the inner diameter of cylinder body (8).
Piston seal (9) block oil from passing through cylinder body (8) inner diameter and piston (5) outer diameter.
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| Illustration 4 | g03372835 |
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Cylinder head (typical example) (3) Rod end port (11) Cylinder head (12) O-ring seal (13) Backup ring (14) Buffer seal (15) Seal (16) Backup ring (17) Retaining ring (18) Bearing (19) Wiper seal | |
Bearing (18) prevents the rod from touching the inner diameter of cylinder head (11).
O-ring seal (12) and backup ring (13) prevents hydraulic oil from externally leaking out of cylinder head (11).
Buffer seal (14) is the first seal that receives pressure. The purpose of buffer seal (14) is to reduce the pressure spikes on seal (15) and backup ring (18) to increase longevity.
Seal (15) blocks oil from passing externally through cylinder head (11). Seal (15) also blocks external liquid from entering the cylinder.
Wiper seal (19) has a lip seal that is pointed outward to wipe off debris of the rod during retraction. The purpose of wiper seal (19) is to prevent particles from entering the cylinder.