TM 5-3805-262-34Section IV. HYDRAULIC SYSTEM MAINTENANCEThis section contains general support maintenance proceduresfor hydraulic pump and hydraulic reservoir.ParaHydraulic Pump Maintenance . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8Hydraulic Reservoir Maintenance4-94-8. HYDRAULIC PUMP MAINTENANCEThis task covers disassembly, cleaning, inspection, and reassembly of hydraulicpump. It also includes a short theory of operation.THEORY OF OPERATIONDrive and driven gears turn in gear housing as shown; there is little clearance be-tween gears and gear housing. Oil comes into area between gear teeth as gear teethmove out of mesh on inlet side of hydraulic pump. As gears turn, oil is taken aroundedge of gear housing. As gear teeth move into mesh again, oil is pushed out of out-let side of hydraulic pump. Oil from outlet side of hydraulic pump pushes thrustplates against sides of gears to prevent oil in outlet side from leaking to inletside of hydraulic pump; thrust plates are located on both sides of each gear set.TOOLS: No. 1 Common Organizational Maintenance Tool KitSafety glassesTorque wrench, 3/4 inch driveSocket wrench set, 3/4 inch driveSlip joint pliersHand hammer, 16 ouncesMechanical puller kitViseAutomotive Mechanic’s Tool KitSocket wrench set, 1/2 inch drivePocket knifeDrive pin punch, 1/8 inch pointThickness gageRubber malletHydraulic pressMicrometer, zero to 5 inchesMATERIALS/PARTS: Cleaning solvent P-D-680 (Appendix C, item 2)Paper labels (Appendix C, item 3)Lubricating oil (Appendix C, item 15)Oil-soluble grease (Appendix C, item 26)Retaining compound (Appendix C, item 33)Seal kit (FSCM 13829 PN 391-1802-165)NOTEPRELIMINARY PROCEDURE: Hydraulic pump removed (page 3-612).4-264
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
