TM 10-4320-226-145.6.2 Impeller Replacement.This task covers:5.6.2.1 Removal5.6.2.2 InstallationINITIALSETUPToolsGeneral Mechanic’s Tool Kit (appendix B,Section III, Item 1)Caliper Vernier (appendix B,Section III, Item 3)Two 3 1/2 inch (76.2 mm) long screws(appendix E, Section II, Item 15)Torque wrench 0-175 ft lbs (appendixSection III, Item 3)Two steel bars, 1 1/4 inch (31.75mm)3/8 inch (9.525mm) x 14 inches(355.6mm)Material/PartsGasket (TM 10-4320-226-24P)Lockwasher (TM 10-4320-226-24P)Seals (TM 10-4320-226-24P)Oil (appendix E, Section II, Item 8)B,xEquipmentConditionsEquipment shut down, refer toparagraph 2.5.1.2 or 2.5.2.2.Pump assembly removed,paragraph 5.6.1.GeneralInstructionsDO not work on equipment withoutfollowing standard shop safetyprecautions.5.6.2.1 Removal.a.b.c.d.e.f.g.Scribe a mark on intermediate housing (figure 5-12, 1) and volute housing (2).Remove nuts (3), lockwashers (4), and intermediate housing (1) from volutehousing (2).Remove and discard gasket (5).Remove and retain two screws (6) and lockwashers (7) diagonally opposite eachother.Install two 3-inch (76.2mm) long screws into threaded holes.Place steel bar (8), 1 1/4 inch (31.75mm) x 3/8 inch (9.525mm) x 14 inches(355.6mm), between screws as shown in figure 5-21 view A.Place a second steel bar (9) into impeller between vanes as shown.Ensure that steel bar (9) is held rigid while striking with hammer. Impelleris made of brass and damage to vanes may occur.Failure to obey thiscaution may cause damage to impeller.h.While holding steel bar (8) at coupling securely in position, and steelbar (9) at impeller end rigid, firmly strike steel bar (9) at impeller end incounterclockwise direction while facing impeller (10) until impeller breaksloose from shaft.i.Remove impeller (10), holding bar (8) and striking bar (9).j.Remove spacer shims (11), spring centering washer (12), and spring (13) fromshaft.5-34
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