When your Lippert hydraulic leveling system stops responding or cycles without building pressure, the pump power unit is often the culprit. The Lippert 149088 GT L+3 bi-rotational hydraulic pump is the correct OEM-matched replacement for compatible Lippert leveling and slide-out systems -- restoring reliable, consistent leveling performance without the guesswork of aftermarket substitutes.
The 149088 is Lippert's GT L+3 series bi-rotational pump unit, designed as a drop-in replacement for the hydraulic power assembly in select Lippert leveling systems. Bi-rotational pump designs allow the motor to run in both directions, enabling the system to extend and retract jacks or slides using a single pump body -- a hallmark of Lippert's integrated leveling architecture.
This pump is cross-referenced against Lippert system references 340, 350B, and 391, covering a wide range of fifth wheels, travel trailers, and motorhomes equipped with Lippert hydraulic leveling from that production era. If your coach originally shipped with one of those system codes, this is the correct pump to restore it to factory-spec operation.
Single pump body handles both extension and retraction of jacks and slides by reversing motor direction -- matches original system logic.
Lippert part 149088 cross-references system references 340, 350B, and 391 for a verified fitment match.
Replaces the complete power unit assembly when internal pump wear, motor failure, or seal failure causes leveling loss.
Built to Lippert specifications for pressure output, flow rate, and duty cycle to match the original leveling system design.
Common signs that the GT L+3 pump unit has failed include:
These symptoms point to pump wear, motor brush failure, or internal seal breakdown -- all conditions addressed by replacing the complete 149088 power unit rather than individual internal components.
Lippert uses internal system reference codes to identify leveling configurations. The 149088 pump is the correct replacement unit for the following Lippert system references:
To confirm fitment, locate the system reference number on your Lippert leveling control box label or on the original pump body. Matching the reference number to 340, 350B, or 391 confirms the 149088 is the correct replacement.
Any time the hydraulic pump unit is replaced, the system reservoir fluid level must be inspected and topped off before operation. Lippert hydraulic leveling systems use Dexron III ATF or a compatible hydraulic fluid -- check your system documentation label on the reservoir for the fluid specification on your particular coach. Do not operate the new pump dry.