BACK UP RING
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169-7837 1697837 ARM STICK CYLINDER SEAL KIT FOR E313B,312B 311B 169-7837 1697837 ARM STICK CYLINDER SEAL KIT FOR E313B,312B 311B:Default Title BACK UP RING169 7837 1697837 ARM STICK CYLINDER SEAL KIT FOR E313B,312B 311B ? ? MATERIAL: NITRILE RUBBER(NBR), POLYTETRAFLUOROETHYLENE(PTFE), POLYURETHANE (PU), NYLON, COPPER, STEEL ETC THE SEAL KIT CONSISTS OF ROD SEAL (IDI ISI), BUFFER RING (HBY), DUST SEAL (DKB), O RING, BACK UP RING, PISTON SEAL (SPGO SPGW SPG KDAS), WEAR RING (WR KZT N4W)ETC; VARIOUS SEAL KITS AVAILABLE FOR BOOM ARM BUCKET HYDRAULIC CYLINDER, MAIN PUMP, CONTROL VALVE, TRACK ADJUSTER, SWING