BIG RED JACKS T90203B, Owner'S Manual

9

  MAINTENANCE INSTRUCTIONS

If you use and maintain your equipment properly, it will give you many years of service. Follow the 

maintenance instructions carefully to keep your equipment in good working condition. Never perform any 

maintenance on the equipment while it is under a load.

Inspection

You should inspect the product for damage, wear, broken or missing parts (e.g.: pins) and that all components

function before each use. Follow lubrication and storage instructions for optimum product performance.

Binding

If the product binds while under a load, use equipment with equal or a larger load capacity to lower the load 

safely to the ground. After unbinding; clean, lubricate and test that equipment is working properly. Rusty 

components, dirt, or worn parts can be causes of binding. Clean and lubricate the equipment as indicated in 

the lubrication section. Test the equipment by lifting without a load. If the binding continues contact Customer 

Service.

Cleaning

If the moving parts of the equipment are obstructed, use cleaning solvent or another good degreaser to clean 

the equipment. Remove any existing rust, with a penetrating lubricant.

Lubrication

This equipment will not operate safely without proper lubrication. Using the equipment without proper 

lubrication will result in poor performance and damage to the equipment. Some parts in this equipment are not 

self-lubricating. Inspect the equipment before use and lubricate when necessary. After cleaning, lubricate the 

equipment using light penetrating oil, lubricating spray.

• Use a good lubricant on all moving parts.

• For light duty use lubrication once a month.

• For heavy and constant use lubrication recommended every week.

• NEVER USE SANDPAPER OR ABRASIVE MATERIAL ON THESE SURFACES!

Rust Prevention:

Check rams and pump plungers on the power unit assemblies daily for any signs of rust or corrosion.

Without a load, lift the equipment as high as it goes and look under and behind the lifting points. If signs of 

rust are visible clean as needed.

Grease Fittings

Some models contain grease fittings that will regularly need to be greased and lubricated.

How the Jack Operates

With release valve closed, an upward stroke of the jack handle draws oil from the reservoir tank into the 

plunger cavity. Hydraulic pressure holds the valve closed, which keeps the oil in the plunger cavity. A 

downward stroke of the jack handle releases oil into the cylinder, which forces the ram out. This raises the 

saddle. When the ram reaches maximum extension, oil is bypassed back into the reservoir to prevent an over 

extended ram stroke and possible damage to the jack. Opening the release valve allows oil to flow back into 

reservoir. This releases hydraulic pressure on the ram, which results in lowering the saddle.

Storing the Jack

1. Lower the Lifting ram.

2. Place the handle in the upright position.

3. Store in a dry location, recommended indoors.

Note: If the jack is stored outdoors, be sure to lubricate all parts before and after use to ensure the jack stays 

in good working condition. Always store jack in the fully retracted postion when stored in outdoor or caustic

enviroments that can cause corrosion and/or rust.