Check out this Blog Post for another nugget of information from the HR Offices at Summit Marine...

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Summit Marine Lifts PATENTED LIFT DESIGN

Overview:

Cylinders – 2.5” bore x 20” stroke, dual acting. PATENTED Retract lift system.

Pump System – Monarch Fluid Power, 2,500 psi, 4 way valve, 12 volt system. 1/4” hose assemblies.

Fluid – Completely biodegradable.

Hydraulic Boat Lift Specifications

Model	HL 4400	Pontoon HL 4400P	HL 6000	HL 8000	HL 12000	HL14/18/24
Capacity #	4,400	4,400	6,000	8,000	12,000	14000 to 24000
Lift Height	40	40	40	40	40	40
Weight - frame only	243	243	303	397	550	1200+
weight - cylinders	52	52	104	104	156	156+
Beam Width	114	114	120	132	132	150
Bunk Length	120	192	144	168	192	216-264
Power Source (not included)	1@12 volt	1@12 volt	1@12 volt	1@12 volt	2@12 volt	24 volt
Water Depth 18" + 1/2 of boat draw for all models. Pontoon requires 0" with 40" beam, 6" with 120" beam.

Features and Benefits

Strong lightweight marine grade 6005 aluminum. Years of trouble free service.
Strong 2 x 6 tube used for beam members. 33% stronger than 2 x 5, and 56% stronger than 2 x 4.5”.
Stainless Steel hardware. Eliminates rusting problems, eliminates premature failure from worn pins.
Monarch Fluid Pump System. Well recognized and trusted name in the industry, thoroughly tested.
Patented Retract Lift System. Cylinders close as the lift elevates – protecting cylinders from scale buildup and Zebra Mussel problems, the # 1 cause for premature cylinder failure. US Patent 5,890,835.
Larger cylinders than its competitors. Allows for 32% reduction in working pressure. Less wear on gears, motor, hoses, fittings and cylinder seals (the #2 cause for cylinder failure). Less strain on the pump motor translates to greater battery life.
12 volt power. Safe, clean power at the lake shore.
Quick disconnects keyed one way. Easy to disconnect, reconnection cannot be done wrong.
Biodegradable fluid. Same high quality power fluid used by the logging industry to protect our forests.
Swivel bunk supports. Adjust to your hull’s dead rise.
Changeable foot pad tube. Allows the customer to change the foot height tube without purchasing the whole assembly.
Interchangeable leg assembly. Less expensive to change to canopy uprights later or change beam widths.