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All rights reserved. Assembling the Roller Checking the Inlet Valve If the unit is new or has been stored for an extended period of time Installing the Batteries and Attaching the Strap the inlet ball can become stuck and the pump may be difficult to prime. To check: 1. Open the battery door. The battery door is located on the drive housing. 2. Insert the batteries in the proper direction. +- +--+ -+ CAUTION Improper installation of batteries may cause batteries to overheat and leak acid. Acid m