Presto P4 manual Repacking the Cylinder, Adjusting the Chain Tension

eye. The reflector may need to be cleaned or replaced.

2.The down valve may be de-energized. While the platform is lowering, the down valve should be energized and fully open. Check the solenoid in the valve with a voltmeter. The valve must be clean and free to operate. Remove the solenoid, then the down valve. Look for dirt or metal chips which could block the valve action. Clean the valve plunger with kerosene, then blow it clean with compressed air. Before reassembly, depress the plunger manually several times to be sure it moves freely. The expansion nut which holds the solenoid should be finger tight only! If these steps do not solve the problem, please call the Presto Lifts

Customer Service Department at (800) 343-9322.

Repacking the Cylinder

The lift in the P4 Level Loader unit may use several different types of cylinders. To order a repacking kit and receive repacking instructions, please call the Presto Lifts Parts Department at (800) 343-9322. When ordering, specify the model number and serial number of the unit.

Adjusting the Chain Tension

It is very important that the lifting chain be tensioned correctly. As the chain is used, it will tend to stretch a bit. Over time, this can cause it to loosen. The adjustment mechanism is located on the rear of the unit. See Fig. 7.

1.Lower the platform completely and unplug the unit. Remove the plate on the rear of the unit.

2.Loosen the two locking bolts.

3.Find the two tensioning bolts. Loosen the locknuts so you can turn these bolts.

4.Turn the tensioning bolts in or out to change the chain tension. The chain tension should be as tight as possible without lifting the platform off of the floor. The setting should be the same on each side of the mechanism.

5.When the tension is correct, tighten the lock nuts.

6.Tighten the two locking bolts.

PRESTO P4 LEVEL LOADER OWNER’S MANUAL 15