Thieman 4498 – M-25/30 Power Unit

Thieman Part #4498 / 4400351 – Power Unit for M‑25 and M‑30 Liftgates

Thieman liftgates OEM hydraulic power unit for M-25 and M-30 gravity-down liftgates. Thieman part number 4498, this assembly meets factory specifications and includes all essential components (MUST include liftgate serial number in your order comments to assure correct application) :

• 12 V electric motor

• 2,500 PSI Pump and Reservoir

• Solenoid, valve assembly, buss bar, and wiring

• Breather cap, brackets, seals, and hardware components

Precision fit and performance, this power unit is interchangeable between Part 4498 and 4400351 and is designed for reliable operation and OEM compatibility

Key Features:

• OEM hydraulic power unit compatible with Thieman M‑25 and M‑30 liftgate models (MUST include liftgate serial number in your order comments to assure correct application) 

• Gravity‑down toggle design, pump rated at 2,500 PSI

• Complete power assembly, includes: motor, pump, reservoir, solenoid, valve, hardware, and electrical components

• Approved replacement for Thieman part numbers 4498 and 4400351

• Ensures safe, efficient operation and maximum longevity

• Ideal for liftgate repair or replacement applications requiring OEM-equivalent parts

Applications & Benefits:

Built for professional repair shops and fleet maintainers, this Thieman power unit delivers consistent hydraulic pressure and smooth control for loading/unloading operations. As an OEM-specified unit, it ensures:

• Proper hydraulic performance and safety standards

• Full reliability and compatibility with M‑series Thieman platforms

• Reduced downtime with factory-fit replacement components