SERVICE CHEMICAL FIRE EXTINGUISHER (M1059A3 ONLY) Continued
21. Thoroughly clean threads and gasket surface with stiff brush. Ensure pressure relief vent (1) grooves are unobstructed.
22. Thoroughly clean threads of top collar (2) with stiff brush. Wipe clean with a rag.
23. Remove retainer (3) and preformed packing (4) which secure stem indicator assembly (5). Clean or replace parts as
required. Cap (6) should be replaced only if damaged.
24. Reassemble cap indicator (7). Reset indicator by pulling it in.