31M8-51120 R55-7 Excavator Hydraulic Arm Cylinder Assy for Hyundai Parts ISO9001 Approval
Work Equipment |
R55-7 Arm Hydraulic Cylinder Assembly |
Type |
R55-7 |
PN |
31M8-51120 |
Warranty |
12 Months |
Main Material |
High-Strength Forged Steel |
Advantage
1. 16+ Years of Expertise
Over 16 years focused on hydraulic cylinders. We know excavator demands and real-world working conditions.
2. OEM-Level Performance
Built to match or exceed OEM specs. Fully compatible with Hitachi, Komatsu, Volvo, Hyundai, Doosan, Kobelco, and more.
3. Complete Model Coverage
Support for both new and older models. Cylinders available for boom, arm, and bucket with regular model updates.
4. Strict Quality Control
100% pressure-tested before delivery. Full in-house production ensures consistent quality from raw material to finish.
Spare parts of ths 31M8-51120 R55-7 hydraulic cylinder
Pos. |
Part No. |
Part Name |
*. |
31M8-51120 |
ARM CYLINDER |
1 |
31Y1-22891 |
TUBE ASSY |
2 |
31Y1-22350 |
ROD ASSY |
3 |
31Y1-16401 |
GLAND |
4 |
S732-055030 |
DD2 BUSH |
K5. |
Y200-055011 |
SEAL-ROD |
K6. |
Y180-055020 |
RING-BACKUP |
K7. |
Y240-055011 |
RING-BUFFER |
K8. |
Y110-055011 |
WIPER-DUST |
9 |
Y190-069000 |
RING-SNAP |
10 |
S632-090001 |
O-RING |
11 |
S632-085004 |
O-RING |
12 |
S642-085002 |
RING-BACKUP |
13 |
S642-085003 |
RING-BACK UP |
14 |
31YC-25020 |
RING-CUSHION |
15 |
31Y1-24340 |
PISTON |
K16. |
S632-040004 |
O-RING |
K17. |
S642-040003 |
RING-BACK UP |
K18. |
Y450-090000 |
SEAL-PISTON |
K19. |
Y300-090100 |
RING-WEAR |
K20. |
Y440-090000 |
RING-DUST |
21 |
31YC-65290 |
NUT-NYLON |
22 |
31YC-2A040 |
VALVE-CHECK |
23 |
31YC-99070 |
SPRING-COIL |
K24. |
S631-014004 |
O-RING |
25 |
P220-110103 |
PLUG-HEX |
26 |
31Y1-22911 |
PIPE ASSY-R |
K27. |
Y171-015004 |
O-RING |
28 |
S107-080404 |
BOLT-SOCKET |
29 |
S071-022230 |
U-BOLT |
30 |
S201-101002 |
NUT-HEX |
31 |
S411-100002 |
WASHER-SPRING |
32 |
31YC-12020 |
BUSHING-PIN |
K33. |
Y010-050060 |
SEAL-DUST |
34 |
S651-810002 |
NIPPLE-GREASE |
Payment term: T/T, Western Union, Money Gram, Paypal
Delivery date: 3-7 days for parts in stock, 7-20 days for parts not in stock