LIEBHERR DIAPHRAGM HYDRAULIC ACCUMULATOR FOR DRIVE AXLE

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This is a diaphragm-type hydraulic accumulator (membrane storage) designed for the drive axle system, serving to smooth pressure pulses during gear shifts in the transmission. The component works directly with solenoid-operated clutch actuators, utilizing a gas spring pre-charged with nitrogen to dampen sudden pressure spikes and protect electrohydraulic elements from damage. The critical wear mechanism involves fatigue of the elastomeric membrane material (HNBR/FKM) and gradual nitrogen permeation, leading to loss of pre-charge pressure and degradation of the accumulator into a dead-volume state. Loss of this function causes gear shift shudder and, in extreme cases, pressure shock damage to solenoids and seals in the transmission system. Scheduled replacement is significantly more economical than repair of a damaged transmission, as accumulator cost is low relative to drive-train service expenses. Regular pre-charge pressure monitoring and planned replacement prevent critical failures, ensuring smooth wheel loader operation and extending the service life of the entire hydraulic system.

Compatible machines:

• L544-442
• L544-443
• L544-444
• L544-445
• L550-1287
• L550-456
• L554-452
• L554-453
• L556-1288
• L556-454
• L564-463
• L564-465
• L566-1168
• L566-1616
• L566-1617
• L566-1618
• L566-1619
• L566-460
• L574-472
• L574-473
• L576-1169
• L576-1413
• L576-457
• L580-1170
• L580-1412
• L580-1456
• L580-1495
• L580-458
• L580-459
• L584-788
• L586-461

Travel-system component for LIEBHERR construction machinery — used in travel reducers and final drives of crawler machines (excavators, crawler loaders, dozers) as well as in drive axles and wheel-hub planetary reductions of wheeled machines (wheel loaders, wheeled excavators). Industry synonyms: travel drive, final drive, drive axle, traction drive, travel reducer, planetary final drive, drive reducer, wheel-hub reduction.