Opening of Bids - Spec T Eighteen (18) More or Less New Heavy Duty Mobile Lifting Systems - Interstate Lift & Equipment Company, Inc. (bid security chk submitted)

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7.8. At 220V, 3 phase, the lift system shall not draw more than 15 Amps per pair of columns, 30 Amps for a set of 4 columns or 45 AMPS for a set of 6 columns. �7ltTriT�t�i: rr► rF3TI 8.1. The drive system shall be hydraulic drive and shall permit lifting without any pulsation, jerks, or unsteady lifting. Lifting shall be smooth. Hydraulic system shall comprise an electrically -powered pump, flow control valves, and a fluid reservoir. 8.2. Hydraulic lifting cylinder shall be of piston type to prevent leakage in case of piston damage. Cylinder casing shall be mounted to the column base and the piston shall be encased in the carriage to protect it from debris and damage. 8.3. The removal and installation of the lifting cylinder shall take place in less than 30 minutes per column. 8.4. Hydraulic fluid shall be contained in high pressure hydraulic hoses with 6 to 1 bursting pressure rating. 8.5. Jacks shall be equipped with mechanical end stops at the top and bottom of the lifting stroke. 8.6. The hydraulic unit shall be equipped with a dual valve system for smooth equalization. 8.7. Hydraulic lifting cylinder shall be equipped with a wiper to remove dirt, dust and other contaminants on the plunger. 8.8. Each hydraulic cylinder shall be equipped with a velocity fuse to prevent decent in the event of a major fluid leak. 8.9. Piston shall be chrome plated for low abrasion conditions and to prevent slip -stick problems. 9. Safety Devices 9.1. Each column shall have an automatic multi -position mechanical looking system. This system shall incorporate a spring loaded latch that will automatically engage when the lift is not in operation. The column shall have a minimum of 21 lock positions beginning at the height of 7 inches and spaced every 3 inches for the entire stroke of 69 inches. This safety device shall be totally independent from the lifting drive system. Systems that utilize non -load bearing "safety nuts" shall not be approved since they are integrated with the lifting drive itself. 9.2. The mechanical lock shall be released by a solenoid valve when the lift is in lowering. 9.3. Each lock shall have a manual pull type override lever to allow the lock to be manually released so that a vehicle maybe lowered in the event of a power outage. This lever shall be easily accessible without disassembling any lift components, 9.4. The lifting system shall incorporate multiple redundant safety systems. The lift shall support the vehicle in the event of a mechanical failure, motor failure, hydraulic failure or loss of electrical service by incorporating electrical, mechanical and hydraulic safety systems. 9,5. Motive UP and DOWN push buttons shall be of a dead -man type so that constant pressure must be maintained on the button by the operator in order to operate the lifts. 9.6. Thermal protection relays shall be provided to protect the motors against overload. 9.7. Cable hold down bracket shall be of steel construction to providesafe storage of cable when the lift is not in operation, 9.8. A pilot light on the master control box shall indicate when the system is powered. 9.9. A phase relay shall be provided to automatically deactivate the system in event of a phase reversal in the power supply.