Model 4700 Maintenance Manual

Tire Replacement

Any misalignment of the tire and hub while the tire is being pressed onto the hub can damage the hub. For this reason, chamfers are provided on the outside edge of the hub and on the end of the inside diameter of the tire’s metal insert. The chamfers help to center the hub and tire during the pressing operations and reduce the possibility of misalignment. To prevent damage, the hub must be installed on the circular ram with its chamfered side up.

1.Check inside surface of metal insert on new tire. Use sandpaper to remove any scaling or rust. Clean inside of metal insert and lubricate it with a soap solution.

2.Place circular ram on the press table. See Figure7-39. The length of the ram must be longer than width of the old tire to allow complete removal of old tire. The outside diameter of ram must be small enough to fit loosely in the insert of tire but must be large enough to rest squarely on flat surface on outer edge of hub.

tire. The new tire must be placed in the same position the old tire was installed on hub. You can use a spacer (slightly smaller in diameter than inside diameter of tire insert and same thickness as depth of recess) to obtain correct amount of recession.

4.Position hub assembly with old tire on top of circular ram so outside of wheel is positioned upward. The outside edge of hub has a chamfer to help guide new tire onto wheel. The chamfered edge must always be leading edge when a tire is pressed onto hub.

5.Center hub assembly on top of ram and make sure that they mate squarely.

6.Position new tire with its chamfered insert facing hub. Align new tire and hub so that they are concentric.

7.Begin pressing new tire onto hub and old tire off wheel. Run press slowly for the first few inches of travel, because this is the critical stage of the operation. If tire begins to cock to one side, stop press and realign tire. A sharp jar with soft-headed mallet usually realigns tire on hub.

NOTE : If new tire does not press on with a minimum of 5 tons (68,947 kPa) pressure, replace hub.

8.Release press. Remove wheel, tire assembly, and old tire from press table. Inspect wheel and tire assembly.

3.If outside edge of hub is not flush with edge of metal insert in the old tire, measure how far hub is recessed inside

Publication 1160093, Issued: 20 May 2013 7-35

Section 7.Component Procedures

Battery Procedures

Battery Procedures

Battery Exterior Cleaning

1.Read, understand, and follow procedures, recommendations, and specifications in the battery and battery charger manufacturer’s manuals.

2.Wear personal protective equipment. See “Battery Safety” on page2-5.

3.Turn the key switch OFF and disconnect the battery connector. Remove the battery from the lift truck.

4.Inspect the battery cables to make sure they are not frayed or loose. Inspect the battery connector. Make sure there is no foreign material inside the connector. Make sure the filler plugs are tight and the vent holes in the filler plugs are not plugged.

Electrical Components of 1 lb. (0.45 kg) of baking soda added to 0.5 gal. (1.9 liters) of hot water.

7.Use a brush with flexible bristles to clean the entire top of the battery with the soda solution. Wait until all foaming stops, indicating that the battery exterior is neutralized.

8.Rinse the battery with clean water.

9.Dry the battery completely before reinstalling it.

10.Reinstall the battery in the lift truck.

11.Connect the battery connector. Close the battery cover and secure the latch.

Testing, Charging, and Maintenance

For information on testing, charging, and maintaining your lift truck battery, consult the battery manufacturer’s specifications and instruction manual.

5.Keep the top of the battery clean and dry. Corrosion, dust, and moisture provide a conducting path to short-circuit cells or create shorts to ground.

Do not clean the top of the battery with the soda solution while it is installed in the lift truck. Water can seep into the electrical components and cause serious damage.

6.Wash dirty batteries (or any that have had electrolyte spilled on them) with a solution

7-38

Never connect a battery charger directly to the lift truck. This can cause severe damage to the lift truck’s electrical system. Plug the char ger into the battery connector only.

Publication 1160093, Issued: 20 May 2013