Hyundai HL955 Manual page 499

8. BOOM AND BUCKET CYLINDER
The boom cylinders are two unit and the bucket cylinder is one unit. They use a bolt on rod guide.
The piston (14) threads on to the rod (2) and is retained by a nut (20) and set screw (21).
The piston seals against the tube (1) with piston seal (15). Two wear rings (16) are located on each
side of the piston seal.
The gland (3, the rod guide) seals against the tube with an O-ring (12). The cylinder thread seals
against the rod with a lip type buffer ring (8) and a rod seal (5). A dust wiper (9) cleans the rod when
it is retracted.
1) BOOM CYLINDER
22
28
21
27
20
1 Tube assembly
2 Rod assembly
3 Gland
4 Bushing
5 Snap ring
6 Rod seal
7 Back up ring
8 Buffer ring
9 Dust wiper
10 Snap ring
11 O-ring
3
4
5
11
13
12
30
29
25 31
26
1
12 O-ring
13 Back up ring
14 Piston
15 Piston seal
16 Wear ring
17 Dust ring
18 O-ring
19 Back up ring
20 Lock nut
21 Set screw
22 Bolt
6-35
2
10
18
19
14
17
16
15
28
27
24
23
24
23 Bushing
24 Dust seal
25 Pipe assembly
26 Pipe assembly
27 O-ring
28 Bolt
29 Band assembly
30 Bolt
31 Spring washer
9
6
7
8
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