Table 4-1. Unit Preventive Maintenance Checks and Services for Fire Suppression Equipment Trailer Set - continued

TM 10-4210-235-13 ITEM ITEM TO BE NOT FULLY MISSION NO INTERVAL CHECKED OR PROCEDURE CAPABLE IF: SERVICED 11 Annually Hose Reel Bearings Attach grease gun to lubrication fitting and apply grease until it comes out around shaft. Remove grease gun and wipe off excess grease with clean rag. Use general purpose grease or equivalent 12 Annually Rewind brake assembly Attach grease gun to lubrication fitting and apply grease until it comes out around shaft. Remove grease gun and wipe off excess grease with clean rag. Use general purpose grease or equivalent 13 Annually Trailer Wheel Bearings Lubricate, re-pack, wheel bearings. See paragraph 4-30. 14 Annually Unit Functional Check NOTE This check will not pressurize the Dry chemical or AFFF tanks, nor discharge any fire fighting chemical. a. Remove strip ties and pull retaining clips from two each ball valves. b. Close both charge ball valves and open both purge ball valves. 4-7