GAUGE AS-OIL LEVEL (DIPSTICK) 2934781 - Caterpillar

Blade Cylinder
Illustration 1 g03711641
Hydraulic blade cylinder
(1) Blade cylinder
(2) Rod end port
(3) Head end port The blade cylinder moves the blade up and down. When hydraulic fluids flows into head end port (3) of blade cylinder (1), the cylinder extends. This action causes the blade to perform a blade DOWN on the machine. When hydraulic fluid flows into rod end port (2) of blade cylinder (1), the cylinder retracts. This action causes the blade to perform a blade UP operation on the machine. Cylinder Construction
Illustration 2 g03711648
Cutaway view of blade cylinder
(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
SealsBlade cylinder (2) has various seals to prevent the hydraulic fluid from leaking past piston (5).Piston Seals
Illustration 3 g03729780
Cylinder piston
(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.Head Seals
Illustration 4 g03372835
Cylinder head
(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.