TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
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TM 9-2320-387-24-l 1 5-14. TRANSMISSION ROAD TEST I This taskcovers: Road Test INITIAL SETUP: Tools General mechanic’s tool kit: automotive (Appendix B, Item 1) Manual References TM 9-2320-387-10 Equipment Condition l Transmission fluid at proper level (TM 9-2320-387-10). l Adjust transmission shift linkage (para. 5-9). MaintenanceLevel Unit 1 Road Test 1 1. 2. 3. 4. 5. 6. 7. 8. 9. Position shift lever in @ (overdrive), and accelerate vehicle. A l-2,2-3, and 3-4 shiR should occur at all throttle openings. Allow vehicle to coast down to about 0 mph; 43,3-2, and 2-l shifts should occur. Position shift lever in D (drive) and accelerate vehicle. A l-2 and 2-3 shift should occur at all throttle openings. Allow vehicle to coast down to about 0 mph; 3-2 and 2-l shifts should occur. Position shift lever in 2 (low two), and accelerate vehicle. A l-2 shiR should occur at all throttle openings. No 2-3 shift can be obtained in this range. A l-2 shift in 2 is somewhat firmer than in D. This is normal. Position shift lever in 1 and accelerate vehicle. No upshifts should occur in this range. Position shift lever in @, and with vehicle speed at approximately 45 mph, close throttle and move lever to 3. Transmission should downshift to 3rd gear. An increase in engine rpm and engine braking effect should be noticed. Position shifi lever in D and, with vehicle speed at approximately 35 mph, close throttle and move lever to 2. Transmission should downshift to 2nd gear. An increase in engine rpm and engine braking effect should be noticed. Position shift lever in 2 and, with vehicle speed at approximately 25 mph, close the throttle and move lever to 1. Transmission should downshift to 1st gear. An increase in engine rpm and engine braking effect should be noticed. Position shift lever in R, and check for reverse operation. Hard shifting may indicate an underfilled or clogged system. Section II. TRANSFER CASE MAINTENANCE 1 5-15. TRANSFER CASE MAINTENANCETASK SUMMARY 1 I I I I TASK PARA. PROCEDURES PAGE NO. 5-16. Transfer Case Shift Rod Maintenance 5-32 5-17. Speedometer Driven Gear Replacement 5-34 5-18. Transfer Case Oil Seals Replacement 5-36 5-19. Transfer Case Vent Line Replacement 5-39 ..- 5-31