NHS Hydraulic Dock Leveler

NOVA’s NHS Series Premium Hydraulic Dock Levelers incorporates the use of hydraulics to raise and lower both the platform and lip. A single push-button activates a hydraulic pump for operating both the leveler platform and lip cylinders.


  • Easy push-button operation for smooth, consistent operation with a hydraulic system that provides for full float at all positions
  • Positive lip extension and retraction with true regenerative hydraulic control
  • Operating range of 12-inches above and 12-inches below dock
  • Full-width rear hinge mounted in compression with structural channel support
  • Velocity fuse hydraulic fail safe stops platform with 1 to 3-inches in free fall situation
  • Subframe design allows for easy quick pit clean out
  • Integral maintenance strut
  • 5 -year warranty

Full width rear hinge in compression with structural channel rear frame supports.

Push-button operation for smooth, consistent operation with a hydraulic system that provides for full float at all positions.

Optional integrated control panel for leveler, restraint, and door. Many other options available.


The push-button is depressed and held activating the hydraulic system that lifts the deck from a stored position. When the deck reaches the fully elevated position, the lip cylinder is activated extending the lip assembly. The attendant releases the push-button when the lip is fully extended and the deck descends to the trailer bed. The lip will rest on the trailer bed and the deck will float with the trailer (12-inches above/below dock operating range). After loading/unloading is complete, the attendant depresses the push-button lifting the leveler from the trailer bed. The push-button is held until the lip falls pendant and then released allowing the leveler to rest in the lip keepers.


The platform is constructed of a 1/4-inch thick four-way high tensile 50,000 minimum yield A572 safety tread plate. Platform is reinforced and supported by full-length 6-inch high formed C channels welded to deck and front and rear header for firm structural support. Front and rear header plates are 1/2-inch
thick × 7-inch high hot rolled steel. NOVA NHS series lips are four-way safety tread plate, the 25,000-pound Comparative Industry Rating (CIR) capacity is 1/2-inch thick, and the 30,000, 35,000 and 40,000-pound CIR are 5/8-inch thick. The standard lip length is 16-inches on all capacities. Hinge
tubes are 1 3/4-inch outside diameter(OD) × 5/16-inch wall, 1 7/8-inch OD × 3/8-inch wall or 2 1/8-inch OD x 1/2-inch wall depending on CIR. All lip hinge pins are 1-inch diameter M1044 steel. Steel header gussets are standard on all models 35,000-pound CIR and above. All units have grease fittings as standard. All platforms are designed to compensate for up to 4-inches of canted trailer bed.


The platform is raised by a main hydraulic cylinder; all hydraulic hoses are routed under the leveler platform, away from debris. The ramp cylinder is a hard chrome-plated double-acting design with a 3-inch bore and is equipped with a velocity safety stop to limit free fall of a loaded platform to 3-inches. Motor pump is mounted up for easy access and to clear debris in pit and includes a translucent reservoir for monitoring fluid level.


The hydraulic power unit motor is a 1.25 HP TENV at 120V or 208V single-phase or 208V, 230V, 460V, or 575V three-phase. The electrical control panel is NEMA 12 enclosure. All electrical components, connections and wiring are UL listed or recognized.


  • A velocity fuse limits the unit to a 1 to 3-inches drop in a fully-loaded free fall situation
  • Full range yellow telescoping toe guards close off sides even in highest position
  • Built-in lockout/tagout maintenance inspection strut
  • Lip keepers for cross-traffic support and automatic night lock security against theft


  • Levelers are painted grey


  • Two laminated 4-inch 1014 bumpers are standard on the 25,000-55,000 pound CIR units
  • Two Laminated, 6-inch 1014 bumpers are standard on the 75,000 and 100,000 pound CIR units



  • 18-inch (standard on 75K-100K units) or 20-inch lip
  • Auto-return to dock
  • 5-inch safety barrier lip
  • Weather seal—rubber or brush
  • Optional bumper sizes and types available
  • IntelliDock Combination control box
  • Three-wheel support
  • Pan unit (4-sided) or pit kit (3-sided)
  • E-stop/independent lip
  • Other options available—consult NOVA