TM 10-8415-208-12 Table 3-2.  Unit Preventive Maintenance Checks and Services for the STEPO-I(Cont) A - After Operation Q - Quarterly INTERVAL Item Item To Be Procedures Equipment Is No. Inspected Check For And Have Repaired Not Ready/ A Q Or Adjusted As Necessary Available If: 60 Remove and recharge battery. Battery is installed. (See paragraphs 3-8.2.2 and 3-8.3.) 61 Coolant Bag Inspect bag for rips, tears or holes. Bag is punctured. NOTE The coolant bag holds four (4) pounds of cube or crushed ice or three (3) gel packs.  Gel packs require 8-10 hours to fully freeze and provide longer operating time.  Approximately one (1) quart of potable water is necessary to operate the ice vest. 62 Ensure the required amount of Ice, frozen gel packs ice or gel packs and potable or water are not water are available. available. CAUTION Equipment damage.  Always completely drain the coolant bag to prevent mildew inside the ice vest.  Failure to drain the coolant bag may cause equipment failure from mildew and require replacement of the coolant bag or ice vest. 63 Drain the coolant bag and Left full. remove ice or gel packs. 64 On/Off Switch Operate the switch to ensure it Pump fails to start. is working properly. (Requires installation of battery.) 65 Temperature Rotate valve to ensure it is Valve fails to Regulating Valve working properly. operate. 66 Adjustable Inspect for missing broken Buckles are broken Straps buckles.  Ensure proper fit. or missing. Proper fit cannot be made by minor adjustments. 67 Inspect webbing for rips or Webbing is ripped or tears. torn. Change 2  3-142