TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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TM 9·2815-220-34 Table 3-15. Oil Pump Repair Standards -Co11ti1111ed ig. Ref. Point of Sizes and fits Wear Component No. Letter Measurement of new parts limits Oil pump pressure 3-202 z Spring helical compression (small). relief valve Approximate free length. 4.` inch . Load at 3.22 inch. l•I 1.5 lb to • 156.5 lb Maximum solid height. 2.Zinch Refer lo paragraph 3-37c r explanation of symbols. Table 3·16. Oil Pump Standard Stud Jdentijicatio11 Fig. Ref. Sett. ing No. No. No. height req'd Stud size and length 3-202 25 5-9/32 3 5/ I 6·18 (3/4) x 5/16·24 (13/16) x 5· I I/ 16 26 5·11/16 2 5/16·18 (3/4) x 5/16·24 (l3/16) x 6.00 ·15 29/32 5 5/16·18 (3/4) x 5/16·24 (9/16) x 1·5/16 46 2·1/64 I 5/16·18 (5/8) x 5/16·24 (13/16) x 2·9/16 Refer 10 figure 3·141 for oversize stud iden1ifica1ion. 3· 79. Assembly a. Install pressure oil pump intake screen (36, fig. 3-202) on pressure oil pump housing(39) and secure with four flat washers (2) and oil pump screen bolts (2). Install pressure oil pump driven impeller (40) and oil pump impeller drive shaft (29) in pressure oil pump housing (39). Install oil pump drive gear shaft(27) in pressure and scavenge oil pump spacer (41) and install spacer on oil pulilp housing (39). InstalJ scavenge oil pump drive impeller (43) and scavenge oil pump driven impeller (42) in scavenge oil pump housing (44). Install scavenge oil pump housing (44) on pressure oil pump housing (39). Install one make-up pump drive impeller (23) and two driven oil pump impellers (47) in scavenge oil pump housing(44). Install make-up oil pump drive shaft (48) and oil pump driven impeller shaft (22). Install cover assembly (21) to scavenge oil pump housing (44), and secure with six flat washers (3) and self-locking nuts (2). b. Install lock plate (18) on scavenge oil pump housing cover assembly and secure with machine bolt (19). Install level oil pump drive impeller (17) on oil pump impeller drive shaft (29) and level oil pump driven impeller(16) on oil pump driven shaft (22). Install pressure oil pump housing cover (14) o n oil pump housing (39) and secure with three flat washers (3) and self-locking nuts (2). Install oil pump gear plate (13). Install thrust washer bear- ing (12) and oil pump drive cluster gear (10) on oil pump drive gear shaft(27). Install new washer key (8) and plain nut (7). Position a brass rod or drift between scavenge oil pump driven and drive impel- lers through opening i n scavenge oil pump housing to hold impellers stationarY.. Tighten elain nut (7). Torque tighten nut to 575-625 lb. in. Bend tabs on washer key (8) securing plain nut (. Install oil pump impeller drive gear (6) and secure with self- locking nut (5). Torque tighten self-locking nut to 700-780 lb. in. Install spacer and oil pump gear cover (4). Secure cover (4) with bolt (1) and self. locking nut (2) and flat washer(3). Install two setf- locking nuts (2) and flat washers (3). Install capti- vated capscrew (") and flat washers (35). Install pressure relief valve (30). inner valve spring (31), outer valve spring (32) and valve cap (33) in pres· sure oil pump housing. Tighten cap and secure cap with locking wire. Install two preformed packings (1, fig. 3-203). . 3-80. General Section XI. REPAIR OF OIL PAN AND ASSOCIATED PARTS 3-81. Disassembly This section covers the t·epair of the oil pan, oil pan reserve cover, plugs d associated parts. Specific instructions on disassembly, cleaning, inspection, repair and assembly accompany the repair opera- tions. a. Remove 24 capscrews (1, fig. 3-204) and remove reserve cover (2) and bracket (3). Remove five capscrews (18) securing scavenge inlet screen (17) to oil pan (8). Remove scavenge inlet screen (17) and gasket (16). Discard gasket. Change 2 3·113 I