82218A1 CNH Boom Seal Kit is a genuine seal kit used for the backhoe boom cylinder on selected CASE 580 backhoe loader models. This seal kit is commonly used during hydraulic cylinder repair or servicing when the boom cylinder starts leaking hydraulic oil, becomes weak, or cannot hold hydraulic pressure properly.
The backhoe boom cylinder is an important hydraulic component that controls the lifting and lowering movement of the rear boom. During heavy digging, lifting, and backhoe operation, the boom cylinder must hold strong hydraulic pressure. When the internal seals are worn, hardened, cracked, or damaged, the cylinder may lose pressure and cause weak boom movement, oil leakage, or unstable operation.
Replacing the boom seal kit helps restore proper cylinder sealing, reduce hydraulic oil leakage, improve boom cylinder performance, and maintain smooth backhoe operation.
Compatible / Suitable Models:
Suitable for:
CASE 580 L
CASE 580 M
CASE 580 M Series 2 / M2
CASE 580 M Series 3 / M3
Product Details:
Part Number: 82218A1
Product Name: Boom Seal Kit
Application: Backhoe Boom Cylinder
Cylinder Size: 2 1/4" x 4 1/2"
Brand: CNH Original Genuine
Machine Type: CASE Backhoe Loader
Condition: New Genuine Part
Common Symptoms:
Hydraulic oil leaking from boom cylinder
Boom cylinder becomes weak during operation
Boom cannot lift or hold position properly
Boom slowly drops by itself
Cylinder movement becomes slow or unstable
Oil leakage around gland or cylinder rod area
Old seal becomes hard, worn, cracked, or damaged
Hydraulic pressure loss during backhoe operation
Importance / Why Replace:
A damaged boom seal kit can cause hydraulic oil leakage and reduce the working power of the boom cylinder. If the seal kit is not replaced early, the cylinder may continue to lose pressure and affect digging, lifting, and backhoe operation.
Continued use with damaged seals may also cause further damage to the cylinder rod, gland, piston, cylinder tube, and hydraulic system. Replacing the seal kit helps restore hydraulic pressure, reduce oil leakage, improve boom movement, and extend the service life of the cylinder.
Recommended Inspection:
Before installing the new boom seal kit, it is recommended to check the condition of the cylinder rod, gland, piston, and inner cylinder tube. If the rod is scratched, rusty, bent, or the cylinder tube is worn, the cylinder may still leak even after replacing the seal kit.
Always compare the old seal kit, cylinder size, and cylinder type before installation to make sure 82218A1 is the correct seal kit for the machine.
Boom cylinder 是控制后臂升降动作的重要液压部件。在挖泥、吊起、拉动和 backhoe 操作时，后臂油缸需要承受很大的 hydraulic pressure。如果油缸内部油封老化、硬化、破裂或磨损，油缸就会失去密封效果，导致 hydraulic oil 泄漏、压力不足、后臂无力或操作不稳定。
更换新的 boom seal kit 可以帮助恢复油缸密封性能，减少漏油问题，让后臂油缸动作更加顺畅，适合维修厂、机械维修和 CASE 580 泥机保养使用。
适合车型：
适用于：
CASE 580 L
CASE 580 M
CASE 580 M Series 2 / M2
CASE 580 M Series 3 / M3
产品资料：
零件号码：82218A1
产品名称：Boom Seal Kit / 后臂油缸油封修理包
用途：Backhoe Boom Cylinder / 后臂油缸
油缸尺寸：2 1/4" x 4 1/2"
品牌：CNH Original Genuine 原装
适用机械：CASE Backhoe Loader 泥机
状态：全新原装零件
常见问题：
Boom cylinder 后臂油缸漏 hydraulic oil
后臂油缸工作无力
Boom 不能保持位置
后臂会慢慢下沉
油缸动作慢、不顺或不稳定
gland 或 cylinder rod 位置漏油
旧油封硬化、磨损、破裂或损坏
操作后臂时液压压力不足
为什么需要更换：
Boom seal kit 损坏会导致油缸漏油和液压压力下降，影响后臂升降、挖掘和操作表现。如果继续使用，油缸可能会继续失压，造成 boom 动作无力、速度慢或不能保持位置。
长期使用损坏的油封，也可能会进一步伤到 cylinder rod、gland、piston、cylinder tube 和 hydraulic system。更换新的油封修理包可以帮助油缸恢复正常密封，提高液压压力，减少漏油，并延长油缸使用寿命。
建议检查：
安装新油封前，建议检查 cylinder rod、gland、piston 和 cylinder tube 内部情况。如果油缸芯有刮痕、生锈、弯曲，或缸筒内部已经磨损，就算换了新油封，也可能会再次漏油。
安装前也建议对比旧油封、油缸尺寸和油缸型号，确认 82218A1 是否适合该机器使用。
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