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Page Title: TRANSMISSION OIL PRESSURE TEST
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TM 5-2420-222-34 8-1.   TRANSMISSION OIL PRESSURE TEST. This Task Covers: Test Initial Setup: Equipment Conditions: Materials/Parts: Transmission filled (see LO 5-2420-222-12). Rags (Item 28, Appendix B) Hood removed (see TM 5-2420-222-20). References: Tools/Test Equipment: TM 5-2420-222-10 General mechanic's tool kit TM 5-2420-222-20 Field automotive shop set Hydraulic system tester Personnel Required:  Two TEST 1. Apply parking brake (see TM 5-2420-222-10). 2. Place wood blocks in front of, and behind, front and rear tires. NOTE Use a drain pan to catch fluid when disconnecting hoses.  Clean up all spills. 3. Loosen clamp (4) and disconnect hose (3) from oil cooler (1). 4. Loosen clamp (5) and disconnect hose (2) from oil cooler (1). 5. Install hydraulic system tester to hose (3) and hose (2). 6. Start engine assembly and increase speed to 1500 rpm (see TM 5-2420-222-10). 7. Check hydraulic system tester reading.  Reading should be 7 gpm (27 Ipm) at 50 psi (345 kPa). 8. While assistant rapidly shifts speed gear assembly control lever from reverse to forward (see TM 5-2420-222-10), check hydraulic system tester reading. 9. Reading should be 20-50 psi (138-345 kPa) within 0.1 second after start of shift.  Reading should increase to 100 psi (690 kPa) between 0.8-1.2 seconds after start of shift.  Reading should increase to 145-165 psi (1000-1138 kPa) within 1.2 seconds after start of shift. 10. While assistant rapidly shifts speed gear assembly control lever from forward to reverse (see TM 5-2420-222-10), check hydraulic system tester reading. 11. Reading should be 10-30 psi (69-207 kPa) within 0.1 second after start of shift.  Reading should increase to 100 psi (690 kPa) between 0.8-1.2 seconds after start of shift.  Reading should increase to 145-165 psi (1000-1138 kPa) within 1.2 seconds after start of shift. 12. Shut down engine assembly (see TM 5-2420-222-10). 13. Remove hydraulic system tester from hose (2) and hose (3). 14. Position hose (2) on oil cooler (1) and tighten clamp (5). 15. Position hose (3) on oil cooler (1) and tighten clamp (4). 8-2

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