SPACER 2V1151 - Caterpillar

Stick Cylinder
Illustration 1 g03370589
Hydraulic stick cylinder (typical example)
(1) Stick cylinder
(2) Head end port
(3) Rod end port The stick cylinder moves the stick in and out. When hydraulic fluids flows into head end port (2) of stick cylinder (1), the cylinder extends. This action moves the stick inwards on the machine. When hydraulic fluid flows into rod end port (3) of stick cylinder (1), the cylinder retracts. This action causes the stick to move outwards on the machine. Cylinder Construction
Illustration 2 g03370588
Cutaway view of stick cylinder (typical example)
(2) Head end port
(4) Snubber
(5) Piston
(6) Snubber
(7) Rod
(8) Grease fitting
(9) Cylinder body Stick cylinder (1) is constructed of the following components:
Snubber (4)
Piston (5)
Snubber (6)
Rod (7)
Grease fittings (8)
Cylinder body (9)
Bearings
SealsStick cylinder (1) has various seals to prevent the hydraulic fluid from leaking past piston (5). Stick cylinder (1) also contains snubber (4) on the head end and snubber (6) on the rod end.Piston Seals
Illustration 3 g03370586
Cylinder piston (typical example)
(4) Snubber
(5) Piston
(6) Snubber
(10) Piston seal
(11) Seal
(12) Wear band Wear bands (12) prevent piston (5) from touching the inner diameter of cylinder body (9).Piston seal (10) blocks oil from passing through cylinder body (9) inner diameter and piston (5) outer diameter.Seal (11) blocks oil from passing through the inner diameter of piston (5) and the outer diameter of rod (7).Head Seals
Illustration 4 g03370587
Cylinder head (typical example)
(3) Rod end port
(13) O-ring seal
(14) Cylinder head
(15) Backup ring
(16) Buffer seal
(17) Seal
(18) Retaining ring
(19) Bearing
(20) Backup ring
(21) Wiper seal
(22) Retaining ring Bearing (19) prevents the rod from touching the inner diameter of cylinder head (13).O-ring seal (13) and backup ring (15) prevents hydraulic oil from externally leaking out of cylinder head (14).Buffer seal (16) is the first seal that receives pressure. The purpose of buffer seal (16) is to reduce the pressure spikes on seal (17) and backup ring (20) to increase longevity.Seal (17) blocks oil from passing externally through cylinder head (14). Seal (17) also blocks external liquid from entering the cylinder.Wiper seal (21) has a lip seal that is pointed outward to wipe off debris on the rod during retraction. The purpose of wiper seal (21) is to prevent particles from entering the cylinder.Retaining ring (22) prevents wiper seal (21) from moving during a stick operation.Snubber Operation
Extend
Illustration 5 g03370584
Cylinder rod end (typical example)
(3) Rod end port
(4) Snubber
(5) Piston
(6) Snubber
(7) Rod
(23) Passage
Illustration 6 g03370585
Rod end snubber operation (typical example)
(3) Rod end port
(4) Snubber
(5) Piston
(6) Snubber
(7) Rod
(23) Passage When stick cylinder (1) extends and becomes close to the end of the extension stroke, passage (23) is restricted by snubber (6). This action causes rod (7) to slow down before maximum extension is performed.Retract
Illustration 7 g03371583
Cylinder head end (typical example)
(2) Head end port
(4) Snubber
(5) Piston
(6) Snubber
(7) Rod
(24) Passage
Illustration 8 g03371587
Head end snubber operation (typical example)
(2) Head end port
(4) Snubber
(5) Piston
(6) Snubber
(7) Rod
(24) Passage When stick cylinder (1) retracts and becomes close to the end of the retraction stroke, passage (24) is restricted by snubber (4). This action causes rod (7) to slow down before maximum retraction is performed.