Maeda MK0003, Руководство по обслуживанию, Страница: 148 / 348

2-120
Number Name Q
’
ty
Note
1
•
Cylinder tube assembly
1 359S70900002
2
•
Piston rod assembly 1 359S70901000
3
•
Cylinder head 1 359S70902000
4
•
Bushing 1 359S70903000 (Oiles Corporation LFB4530)
5
•
Rod packing (K1) 1
◆
359S70904000 (Kayaba 12 packing 45 × 55 × 6)
6
•
Backup ring (K1) 1
◆
359S70905000 (45 × 55 × 2.0)
7
•
Dust seal (K1) 1
◆
359S70906000 (Kayaba 50 wiper 45 × 57 × 7 × 11.5)
8
•
O-ring (K1) 1
◆
359S70907000 (1B-G65)
9
•
Backup ring (K1) 1
◆
359S70908000 (T3-G65)
10
•
O-ring (K1) 1
◆
359S70909000 (1A-G70)
11
•
Piston
1 359S70910000
12
•
Piston ring (K1) 1
◆
359S70911000 (NOK SPGW70)
13
•
Wear ring (K1)
1
◆
359S70912000 (UNIPLA 70 × 65 × 10)
14
•
O-ring (K1)
1
◆
359S70913000 (1B-P41)
15
•
Set screw
1 359S70914000 (Cup point M6 × 12)
K1 Repair kit (common to right and left) 1 359S70915000
Specifications
Cylinder bore x Rod bore - Stroke

70 ×

45 - 655st
Normal load
When extended 79.3 kN (at 20.6 MPa) [8.1t (at 210 kgf/cm
2
)]
When contracted 46.5 kN (at 20.6 MPa) [4.7t (at 210 kgf/cm
2
)]
Hydrostatic test pressure
Extension side 25.5 MPa (260 kgf/cm
2
)
Contraction side 25.5 MPa (260 kgf/cm
2
)
Cylinder spontaneous contraction amount (internal leak amount)
Note: Keep the temperature constant because a cylinder contraction amount can be affected by thermal expansion due to
temperature change.
Components of cylinder
Max. internal leak
amount
cc/min
Cylinder bore area
cm
2
Cylinder contraction
amount
cm/day
Derrick cylinder (from JIS B8367) 0.175
38.5
6.5
Counter balance valve 0.05 1.9
Total 8.4