The genuine Lippert sealed Oldham-style collar coupling that links the 179327 unidirectional hydraulic pump motor to the pump drive. Replace this coupling whenever the 179327 motor is serviced or replaced. Sold as a standalone part -- motor not included.
The Lippert 286722 is the sealed Oldham-style collar coupling engineered specifically for the 179327 unidirectional hydraulic pump motor used in Lippert leveling and slide-out systems. Its job is straightforward but critical: it transmits rotational torque from the motor's output shaft directly to the hydraulic pump's drive input, while tolerating slight misalignment between the two shafts without transferring bending load to either component.
Oldham-style couplings use a three-piece design -- two hubs and a center disc -- that allows for angular and parallel shaft misalignment. The sealed construction on the 286722 keeps hydraulic fluid and road contamination away from the coupling interface, which is important in the wet, dirty environment under an RV chassis.
When a 179327 motor is replaced due to failure or wear, the coupling should be inspected and typically replaced at the same time. A worn or cracked coupling center disc will cause vibration, noise, and eventual loss of pump drive -- even with a brand-new motor installed.
Three-piece coupling absorbs minor shaft misalignment between motor and pump without transmitting bending stress to either unit.
Sealed housing keeps hydraulic fluid, grit, and road debris away from the coupling interface for longer service life under chassis conditions.
Direct factory replacement -- matches the original 286722 coupling supplied with Lippert unidirectional hydraulic leveling assemblies.
Best practice is to replace this coupling whenever the 179327 motor is replaced, ensuring full torque transfer and no vibration from a worn center disc.
The Oldham center disc in this coupling is subject to the same wear cycles as the motor itself. Installing a new 179327 motor against a worn coupling disc can cause vibration, chatter, and premature motor bearing wear. Replacing both at the same time is the correct service procedure for Lippert unidirectional hydraulic systems.
Lippert unidirectional hydraulic leveling systems use a single-direction pump motor (part 179327) paired with solenoid valves to direct fluid to individual jacks. If your system uses a bidirectional (reversible) motor instead, this coupling may not apply -- verify your motor part number before ordering.
This listing is for the 286722 collar coupling only. The 179327 hydraulic pump motor, pump assembly, solenoid valves, and all other system components are sold separately. Confirm your motor part number is 179327 before purchasing this coupling.
The 286722 coupling seats between the 179327 motor output shaft and the hydraulic pump drive shaft. When servicing:
When inspecting the coupling during routine service, flex the center disc by hand. Any cracking, deformation, or looseness in the disc-to-hub engagement is a sign the coupling should be replaced before the next season -- even if the motor itself tests good.