TM-9-2815-200-35
ENGINE, WITH CONTAINER:TURBOSUPERCHARGED, DIESEL ,FUEL INJECTION ,90-DEGREE “V” TYPE, AIR - COOLED ,12 - CYLINDER , ASSEMBLY ;MODELS AVDS-1790-2M (2815-856-4996), AVDS-1790-2A AND AVDS-1790-2AM (2815-856-9005)
TECHNICAL MANUAL; DIRECT SUPPORT, GENERAL SUPPORT AND DEPOT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS
TM-9-2815-200-35 - Page 77 of 779
3-5. Troubleshooting Starting System
Malfunction
1. Starter will not operate.
2. Starter runs but will not
crank engine.
3. Starter operates but fails to
crank engine a t
proper
cranking speed.
Probable Cause
a. Improper starting procedure being
used.
b. Starter not receiving electrical
current.
c. Failed starter.
d. Failed starter relay.
a. Failed starter drive gear.
b. Failed starter drive clutch.
a. Improper grade engine oil.
b. Defective starter.
c. Partially seized engine caused by
tight engine bearings.
3-6. Troubleshooting Generating System
1. Generator runs but will not
produce electrical current.
2. Generator does not turn or
operate.
3-7. Troubleshooting Air
1. Restricted air to turbosup-
erchargers (engine will not
develop full power).
a. Generator regulator not operating.
b. Improperly connected generator
cables.
c. Generator not producing electrical
current.
a. Failed generator shaft.
b. Generator drive gear failed.
Intake System
a. Plugged air cleaner.
b. Collapsed air induction hose.
c. Turbosuperchargers worn or fail
to operate.
d. Restrictions in air intak e
manifolds.
Corrective Action
a. Refer to pertinent vehicle Technical
Manual, Appendix A for proper starting
procedures.
b. Refer to pertinent vehicle Technical
Manual,
Appendix A for procedure s
covering troubleshooting vehicle electrical
system.
c. Refer to 1b, para 3-4.
d. Refer to 1b, para 3-7.
a. Refer to 1c, para 3-4.
b. Refer to 1b, para 3-4.
a. Drain and refill with proper grade oil for
prevailing temperature.
b. Refer to 1b, para 3-4.
c. Turn engine manually. If engine does not
turn freely, disassemble engine and replace
or repair damaged parts.
Refer to pertinent vehicle Technica l
Manual, Appendix A for troubleshooting
generator regulator.
Refer to pertinent vehicle Technica l
Manual, Appendix A for correct cable
connections and procedures.
Remove generator (table 4-1). Refer to TM
9-2920-224-35 and overhaul generator.
Install generator (table 4-1).
Replace generator, Refer to 1c, above.
Remove generator (table 4-1). Remove
generator drive adapter and drive gearshaft
(table 5-10). Rebuild adapters and drive
gearshaft (table 6-1). Check generator idler
gears in crankcase for damaged teeth. If
damaged, disassemble engine and remove
idler gear. Install new gear (table 7-1) and
assemble engine. Install generator (table 4-
1).
a. Service air cleaner. Refer to pertinent
vehicle Technical Manual, Appendix A for
procedures.
b. Repair or replace air induction hose. Refer
to pertinent vehicle Technical Manual,
Appendix A for procedures.
c. Remove turbosuperchargers (table 4-1).
Refer to TM 9-2990-200-34 for overhaul
instructions.
Install turbosuperchargers
(table 4-1).
d. Remove intake manifolds (table 4-4).
Remov e
restrictions.
Install intak e
manifolds (table 4-4).
3- 7
Back to Top
