TM-9-2815-220-24

AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL FOR AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

TM-9-2815-220-24 - Page 142 of 1563

TM 9-2815-220-24

ENGINE PERFORMANCE LOW

0019 00

MALFUNCTION 2:

(Continued)

Low stall speed with black exhaust smoke: (one or both banks).

PROCEDURE

OBSERVATION

ANALYSIS

Engine speed increases from speed

obtained in the previous step to

normal speed

Elements are dirty (refer

to pertinent vehicle

manual).

Open doors, remove

elements, clean element

chamber, re-install

elements and close doors.

Repeat stall test.

Engine speed remains the same.

Filters are not the

problem; continue to next

probable cause.

PROBABLE CAUSE

CORRECTIVE ACTION

c. Air cleaner hose collapsed.

(1) Inspect hose.

Replace as required.

d. Turbocharger air inlet blocked.

(1) Inspect turbocharger inlet (WP 0016,

Engine Abnormal Exhaust).

e. Turbocharger deficiency.

(1) Inspect turbocharger (WP 0016, Engine

Abnormal Exhaust).

MALFUNCTION 3:

Low stall with excess bluish exhaust smoke (one or both banks).

PROBABLE CAUSE

CORRECTIVE ACTION

a. Worn or damaged rings with excessive oil

consumption.

(1). Overhaul engine (WP 0178, Disassembly/

Assembly Procedure Sequence for the

AVDS 1790-2 Engine).

MALFUNCTION 4:

Low stall with one bank not firing.

PROBABLE CAUSE

CORRECTIVE ACTION

a. Fuel injection pump malfunction.

(1) Replace fuel injection pump (WP 0115,

Fuel Injection Pump Assembly

Replacement)

END OF WORK PACKAGE

WP 0019 00-4