LIEBHERR HYDRAULIC STEERING ORBITROL UNIT

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A hydraulic hand metering unit (HMU) that meters flow proportional to steering wheel rotation to control frame articulation or wheel steering. It is a critical safety component where internal wear of gerotor elements or seals can cause steering drift, slack, or total loss of control. Replacement is required when symptoms of heavy steering or audible whine appear to ensure safe operation.

Compatible machines:

• L506-1577
• L524-1266
• L524-1355
• L524-1557
• L524-1585
• L524-438
• L526-1558
• L526-1753
• L526-1794
• L526-1872
• L528-1267
• L528-660
• L534-434
• L538-1268
• L538-1356
• L538-1493
• L538-1559
• L538-1637
• L538-1754
• L538-1873
• L538-1966
• L538-432
• L538SP-1854
• L542-1269
• L542-435
• L544-442
• L544-443
• L544-444
• L544-445
• L546-1560
• L546-1755
• L546-1795
• L546-1874
• L550-1121
• L550-1214
• L550-1287
• L550-1756
• L550-1825
• L550-456
• L554-452
• L554-453
• L556-1122
• L556-1288
• L556-1289
• L556-1332
• L556-1757
• L556-1826
• L556-1947
• L556-454
• L564-462
• L564-463
• L564-464
• L564-465
• L574-472
• L574-473
• L580-458
• L580-459
• L580-475

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.