Wacker Neuson Telehandlers, TH

Transfer case fluid capacity & service interval

Wacker Neuson Telehandlers, TH, require transfer case fluid with a capacity range of 0,3 to 1,3 liters. Service intervals include checks at 500 hours and fluid changes at 500 hours or 1000 hours/12 months. The data covers 7 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
TH522, TL48 - Perkins 404F-22T (2015- )
  • Use: Normal
  • Capacity 1,3 liter (30 km/h version)
  • Capacity 0,4 liter (20 km/h version)
  • Check 500 hours
  • Change 1000 hours/ 12 months
TH522, TL48 - Perkins 404F-22T (2015- )
  • Use: Initial service
  • Capacity 1,3 liter (30 km/h version)
  • Capacity 0,4 liter (20 km/h version)
  • Change 500 hours
TH522, TL48 - Perkins 404D-22 (2015- )
  • Use: Normal
  • Capacity 1,3 liter (30 km/h version)
  • Capacity 0,4 liter (20 km/h version)
  • Check 500 hours
  • Change 1000 hours/ 12 months
TH522, TL48 - Perkins 404D-22 (2015- )
  • Use: Initial service
  • Capacity 1,3 liter (30 km/h version)
  • Capacity 0,4 liter (20 km/h version)
  • Change 500 hours
TH408, Yanmar 3TNV82A (2010- )
  • Use: Normal
  • Capacity 0,3 liter
TH412 (22 kW), Yanmar 3TNV82A (2010- )
  • Use: Normal
  • Capacity 0,3 liter
TH412 (29 kW), Yanmar 3TNV84T (2010- )
  • Use: Normal
  • Capacity 0,3 liter

Additional Notes

  • The Wacker Neuson TH408 and both TH412 variants — one rated at 22 kW with a Yanmar 3TNV82A and one rated at 29 kW with a Yanmar 3TNV84T — all share an identical transfer case capacity of 0.3 liter under normal use conditions.
  • The 0.3 liter transfer case capacity across the TH408 and TH412 models is a notably small fill volume, consistent with compact transfer boxes found in light-duty telehandler drivetrains rather than heavy industrial units.
  • No service interval data — such as check or change schedules — appears in the specifications for the TH408 and TH412 models, in contrast to the more detailed interval structure present for the TH522 configurations.
  • The TH522 with a Perkins 404D-22 engine has two distinct transfer case capacities depending on the speed variant: 1.3 liters for the 30 km/h version and 0.4 liters for the 20 km/h version. The more than threefold difference reflects a physically larger transfer box assembly in the higher-speed configuration.
  • The same capacity split of 1.3 liters and 0.4 liters applies to the TH522 equipped with the turbocharged Perkins 404F-22T engine, meaning the speed variant — not the engine variant — determines transfer case fluid volume on the TH522.
  • Under normal use, the TH522 transfer case fluid schedule calls for a level check at 500 hours and a full fluid change at 1,000 hours or 12 months, whichever comes first. The time-based limit of 12 months means fluid age alone can trigger a change even when the hour threshold has not been reached.
  • An initial service interval is specified separately for the TH522, requiring a transfer case fluid change at 500 hours. This early change is a break-in service, intended to remove metal particles and contaminants generated during the initial wear-in period of new drivetrain components.
  • The initial service change interval of 500 hours on the TH522 coincides exactly with the normal-use check interval, meaning the first scheduled inspection and the first fluid change occur at the same point in the service life of a new unit.
  • The same capacity figures and service intervals apply to both the Perkins 404D-22 and 404F-22T engine variants of the TH522, indicating that the transfer case specifications are shared across those two engine options regardless of the difference in aspiration between the naturally aspirated 404D-22 and the turbocharged 404F-22T.

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