TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download

TM 9-2815-220-34 Cy li nder Cmpreion Tt - ntinued 5. Install compreion adapter a nd  in cylinder. 6. Ho ld fuel shut-off (engine"sp" switch) and crank engine. 7. Repeal 5 and 6 ave on all cylin-   10.  10.l l. 2. 3.  10.2 l. 2.  11.  11.l 1. 2.  12.  12.1 1. 2.  12.2 1. Oil Prsure Tests Main Gallery: Remove engine acce plate in turret. Remove engine low oil pressure switch (para 3). In· s t all 1 psi gage in engine low oil pressure switch opening (para 3). St and operate engine at idle speed (675-725 rpm) until oפrating temperatu (1 F.) is reach Operate engine al hgh idle (2500-2@0 rpm) Generator O Models AVDS·l 790-2C and AVDS·l790-2CA) Pump: •Remove pipe plug and install 40 ' psi gage in opening In oil pump at end of generat or. Start and warm up engine al idle speed (675·725 rpm) to operat· ing temp erat ure (14 F.) Crankcase Blow-by Test Crankcase Preure Open rear grille dꝏ and remove transmission cover. Install 10 inch H 2 0 gage in crankcase breather s ystem. Start engine, warm up to operat· ing temperature and perform "stall" lest. Hydrtatic k Test Cranking AUempl: With master switch "ON" hold fuel shutff (engine "stop") switch. Pre starter switch momentarily (approx. 3 sen). Clearing Hydrtatic k: Remove lop deck, engine shroud and covers for access lo injector nll. I 2. Remove all fuel i njto r noules. 3. *Drain intake manifolds. 2-28 Change 3 Table 2·3. Dt u - n a tio n a.  mu:imum cylinder prsure. a. Cmpare preures of all cylinders. a. 15 to 9 psi at 4 and 1 F. - tivel y. a. ( and 70 psi at  and 1 F. pec· lively. a. Oi l preure 1 ± 10 psi . b. Oil p reure same  normal engine gall· ery psure (15·25 i). a. 5 i nch H 2 0 (max.) pu re. b. A\•e 5 inch H 2 0 pu. a. Aud i bly note normal starter engagement action. b. Engine dœs not crank. Analy1ia a. Cylinder pssurcs of ŊǠ ps i at engine cranking speed of 11P rpm are normal. a. A pressure d i fference of 70 psi (max.) a. a. b. a. b. a. b. twn high and low cylinr(s) (sible  valve desanee). Oil pure is normal. Generator oil pump ope rati on is nor· mal, the generator is rotati ng and the drive coupling is functioning. Generator oil pump failed, and/or generator not rotating, and/or drive coupling failed (Refer to  13.7, 2). Crankca preure is n ormal. Crankcase preure is high, indating excessive blow-by or restricted crankc vent at turharger ex. haust outlet pipe. Starter energized and engagement pper. Fiuid In cylinr chamr causing hy· drtatic lk. Hydrtatic damage  engine may exist.