Spare Parts For Hydraulic Gearboxes
Find spare parts for travel, swing and industrial gearboxes, including planetary transmission components used in excavators and heavy machinery. Gearbox repair requires precise matching of gear geometry, bearings and drive interfaces.
Identify parts using the gearbox model, final drive reference, machine model, gear tooth count and dimensional specification.
Spare Parts for Travel, Swing and Planetary Gearboxes
Planetary gearboxes used in excavator travel and swing drives operate under high torque and shock loads. When individual gears, bearings or carriers wear, the gearbox may sometimes be rebuilt without replacing the complete final drive assembly.
Typical Hydraulic Gearbox Repair Components
Depending on gearbox design, service parts may include:
- sun gears,
- planet gears,
- ring gears,
- planet carriers,
- shafts,
- bearings,
- thrust components,
- covers and retaining components.
Planetary Gear Matching
Planetary components must operate as a matched gear set. Tooth count alone does not guarantee compatibility. Gear module, tooth profile, width, pitch diameter and carrier geometry also matter.
Travel Gearbox Repair
In a crawler final drive, the travel gearbox sits between the hydraulic travel motor and drive sprocket. Damage may result from low oil level, contamination, bearing failure or heavy shock loads.
During inspection, look for:
- broken or chipped teeth,
- pitting,
- discoloured bearings,
- excessive gear backlash,
- metal particles in oil.
Swing Gearbox Repair
Swing reduction gearboxes use planetary stages to transmit torque from the swing motor to the excavator swing pinion. Output-shaft play or gear wear can affect rotation accuracy and generate knocking during direction changes.
Use the Gearbox Reference Where Possible
Machine model alone may not identify the gearbox version because manufacturers can use different final drives or swing assemblies across serial-number ranges.
The gearbox or complete drive reference provides a more reliable basis for part selection.
FAQ – Hydraulic Gearbox Spare Parts
Can a travel gearbox be rebuilt?
Yes, if the housing and major interfaces are serviceable and compatible replacement gears, bearings and internal parts are available.
Is tooth count enough to identify a planetary gear?
No. Gear geometry, dimensions and the mating components must also match.
What causes final drive gearbox failure?
Common causes include low lubricant level, contaminated oil, bearing failure, shock loading and normal gear wear.
Should gearbox oil be checked for metal particles?
Yes. Metallic debris can provide useful evidence of internal gear or bearing damage.