Crown Counterbalance Trucks RC 3000: Battery Maintenance

Turn the truck OFF and check that all controls are in neutral. Disconnect the battery.
Tilt the steering wheel up, remove the storage tray (if present), and move the seat towards the rear. Raise the seat deck to the open position. Note: A seat deck can fall. Make certain the gas struts are working properly and will hold the seat deck securely in the open position.
Make certain you use the correct size and weight battery. Never operate a truck that has an underweight or undersized battery installed.
If you use a roller stand to install or remove a battery, make sure the roller stand is the same height as the rollers in your truck's battery compartment. Also make sure the roller stand is at least as long as the battery.
Never let anything metal touch the top of the cells. You could cause sparks or do damage to the battery. Use an insulator (such as plywood) when necessary.
Use an approved spreader bar to move a battery to, or from, the battery compartment or stand. Make sure you adjust the spreader bar hooks to fit the battery.

Replace the battery retainer and side cover.
Lower and latch the seat deck.
Connect the battery.
Return the steering wheel and seat to a comfortable position. Turn the truck ON and check truck operation.