This document describes a 3-ton service jack, model #931PV, designed for lifting vehicles. It has a lifting capacity of 6,000 lbs. and a lifting range of 5-11/16" to 19-5/16". The jack is intended for use on hard, level surfaces capable of sustaining the load and must always be used in conjunction with appropriately rated jack stands for support. It is crucial to never use an automotive jack as a stand-alone device for supporting a load.
Before using the jack, users must read, understand, and follow all provided safety information and operating instructions. The owner/operator should be aware that using and repairing this product may require special skills and knowledge. Instructions and safety information should be conveyed in the operator's native language. If there is any doubt about safe and proper use, the jack should be removed from service immediately.
Pre-Use Inspection:
Before each use, the jack must be inspected for broken, bent, cracked, or damaged parts, including labels. Any jack that appears damaged, operates abnormally, or has missing parts must be removed from service immediately. If the jack is suspected of having been subjected to a shock load (e.g., a load dropped unexpectedly), discontinue use until it has been checked by a factory-authorized service center. An annual inspection by qualified personnel is recommended.
Product Components:
The jack consists of a main jack unit (A) and a pump handle (B). Key parts include the lifting arm, saddle, handle socket, release valve mechanism, pump handle, front wheel assembly, and rear caster.
Operating Instructions:
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Preparation:
- Verify product and application compatibility.
- Familiarize yourself with basic operation by using the stamped end of the handle to engage and turn the release valve: clockwise until firm resistance for "CLOSED" (raise load), and counterclockwise (no more than 1/2 turn) for "OPEN" (lower load).
- Bleeding/Venting Trapped Air: With the release valve in the OPEN position and the saddle fully lowered, remove the oil filler plug. Insert the handle into the handle sleeve and pump 6 to 8 full strokes to release pressurized air. Check the oil level; it should be even with the bottom of the oil filler plug hole. Reinstall the oil filler plug.
- Ensure the jack rolls freely and the pump operates smoothly. Replace worn or damaged parts with factory-authorized replacements only.
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Lifting:
- Place the vehicle in park with the emergency brake on and wheels securely chocked.
- Close the release valve by turning the handle clockwise until firm resistance is felt.
- Center the jack saddle under the vehicle's lift point as specified by the manufacturer.
- Insert the handle into the handle sleeve and pump to contact the lift point. Continue pumping until the load reaches the desired height.
- Immediately transfer the load to a pair of appropriately rated jack stands.
- Crucially, use only the handle assembly provided by the manufacturer. If the handle is worn or operates abnormally, discontinue use until a factory replacement handle assembly is acquired.
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Lowering:
- Raise the load high enough to clear the jack stands, then carefully remove the jack stands.
- Slowly turn the handle counterclockwise, but no more than a 1/2 turn.
- If the load fails to lower, use another jack to raise the vehicle, reinstall jack stands, remove the affected jack and stands, then lower the load with the other jack.
- After removing the jack, push the saddle down to reduce ram exposure to rust and contamination.
Maintenance Features:
- Hydraulic Oil: Use only a quality grade hydraulic jack oil. NEVER mix different types of fluid or use brake fluid, turbine oil, transmission fluid, motor oil, or glycerin, as this can cause jack failure and sudden loss of load.
- Adding Oil: With the saddle fully lowered and the jack in an upright, level position, locate and remove the oil filler plug. Fill with oil until it is even with the bottom of the oil filler plug hole. Reinstall the plug.
- Changing Oil: For best performance, replace the complete fluid supply at least once per year. With the saddle fully lowered, remove the oil filler plug. Lay the jack on its side and drain the fluid into a suitable container (dispose of hydraulic fluid according to local regulations). Refill with oil until it is even with the bottom of the oil filler plug hole. Reinstall the plug.
- Lubrication: Periodically apply light lubricating oil to pivot points to ensure free movement of pump piston linkages. Never apply oil to the saddle. If saddle extension threads require lubrication, clean them with a dry cloth, then apply a drop of bearing grease, distributing it evenly.
- Cleaning: Periodically check the pump piston and ram for rust or corrosion. Clean as needed and wipe with an oily cloth. Never use sandpaper or abrasive material.
- Storage: Store the jack with the pump piston, ram plunger, and saddle fully lowered. Ensure the release valve is open (no more than 1/2 turn) to prevent rust and corrosion on critical surfaces.
Troubleshooting:
The manual provides a troubleshooting guide for common issues:
- Jack will not lift load: Possible causes include the release valve not being tightly closed or the load being too heavy. Corrective actions involve ensuring the release valve is fully closed or considering a higher capacity jack.
- Jack "bleeds off" after lift: Indicates hydraulic unit malfunction. Contact customer support.
- Fluid leaks from reservoir area while lowering: Reservoir overfilled. Drain fluid to the proper level.
- Jack saddle will not descend to lowest advertised height: Ram plunger/cylinder deformed or seized, likely due to off-center loading. Contact customer support.
- Ram plunger will not remain lowered after released from contact with load (creeps back up): Air trapped in the system. Corrective actions involve bleeding air from the system as per maintenance instructions. If the saddle is still in contact with a loaded vehicle, use another jack to raise the load, reinstall jack stands, remove the affected jack, then lower the load with the other jack before bleeding.
- Poor lift performance: Low fluid level, air trapped in the system, or hydraulic unit malfunction. Ensure proper fluid level, bleed the jack, or contact customer support.
- Will not lift to full extension: Low fluid level. Ensure proper fluid level.
Warranty:
The product comes with a one-year limited warranty from the date of purchase, covering defects in material or workmanship. Warranty service is obtained by returning the product with a dated purchase receipt to the retailer or distributor. For service after the warranty period, contact customer service for a list of approved repair facilities. The manufacturer's liability is limited to repair or replacement of defective products, and they are not liable for consequential or incidental damage. All expressed and implied warranties are limited to one year.
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