Safety & Maintenance

Operating Instructions

  • Position jack under vehicle or other object to be lifted. Always be sure lift pad or lift point is centered
  • Front wheels and casters of floor jacks must be free of obstructions so the jack can travel under load. Otherwise the lifting pad is liable to slip off or put undue strain on point being lifted. Vehicle must be out of gear and brake released when lifting.
  • To lift - turn handle or release knob clockwise and pump. If jack is air-bound, open release by turning handle or knob counter-clockwise, hold open and pump rapidly about 4 full strokes. Then close release and pump jack to full height without load. Open release and lower jack. THIS STEP MAY HAVE TO BE REPEATED SEVERAL TIMES TO BLEED ALL THE AIR FROM JACK

LUBRICATION

  • Oil front wheels, caster bearings, all linkages and moving parts periodically
  • Grease lift arm at grease fitting (if so equipped) and lower end of handle at yoke casting

IMPORTANT

USE JACK FOR LIFTING ONLY. TO INSURE SAFETY, ALWAYS SUPPORT VEHICLE OR LOAD WITH STANDS OR OTHER SUITABLE DEVICES SUCH AS TIMBERS, ETC.

Parts List & Operating Instructions

Preventive Maintenance

IMPORTANT: The greatest single cause of failure in hydraulic units is dirt. Keep your jack clean and well lubricated to prevent foreign matter from entering the system. If the jack has been exposed to rain, snow, sand, or grit, it must be cleaned before putting away.

  1. Store the jack in a well-protected area where it will not be exposed to corrosive vapors, abrasive dust, or any other harmful elements.
  2. Lubricate moving parts at least once per month.
  3. Regularly wipe the cylinder columns with a clean cloth to remove dirt and abrasives.
  4. Inspect the jack before each use.

    Take corrective action if any of the following problems are found:

    1. Cracked or damaged housing
    2. Excessive wear, bending, or other damage
    3. Leaking hydraulic fluid
    4. Scored or damaged piston rod
    5. Loose hardware
    6. Modified or altered equipment
  5. WE CAME ACROSS A WEB SITE THAT CONTAINS VALUABLE INFORMATION ON HOW TO REPAIR HYDRAULIC JACKS. WE INVITE YOU TO VISIT OTTO SERVICE'S WEB SITE AT: WWW.HYJACKS.COM/H7.HTM.

SERVICE INSTRUCTIONS

CONDITION: Jack does not rise when pumped

CAUSE: Release valve not closed. Valve balls not seated. Jack out of oil

CORRECTION: Twist handle clockwise. Remove valve balls and clean. Reseat by tapping balls lightly on their seats using a brass rod & small hammer. Check oil level and fill to proper level.

CONDITION: Jack does not lift to full height

CAUSE: Low oil level.

CORRECTION: Lower jack to down position. Remove oil filler plug. Add clean HYDRAULIC JACK OIL to cover the cylinder or, if an upright jack, to the fill hose in the reservoir. DO NOT USE BRAKE FLUID or STANDARD HYDRAULIC OIL!! Use ONLY HYDRAULIC JACK OIL.

CONDITION: Jack creeps down under load

CAUSE: Release ball or discharge ball leaking. Piston cup is leaking

CORRECTION: Remove & clean discharge ball if jack handle rises under load. Rebuild jack using repair kit.

GENERAL INSTRUCTIONS

  • When rebuilding your jack, always replace all of the parts that are supplied in your repair kit
  • Some repair kits are "Universal" kits that fit several series of jacks. You may find parts in these kits that are not used in your particular model
  • Use only HYDRAULIC JACK OIL. Regular hydraulic oil may be too heavy and cause problems in cooler weather. NEVER use Brake Fluid.
  • Always clean all parts of your jack before installing new parts
  • Most floor jack are supplied with a SAFETY OVERLOAD VALVE. Generally, these Safety Valves are not field repairable.
  • Keep track of where the old parts come from when disassembling the jack. This will make the installation of the new parts easier.
  • DO NOT OVERLOAD YOUR JACK - Too heavy a load may cause a hydraulic or structural failure leading to damage, injury or death.
  • A box-end or socket wrench must be used when assembling the ram half of the quick coupler to the ram. The coupler may be damaged beyond repair by using an open-end wrench. It is also recommended that Teflon Tape be used on all pipe threads.
 
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