TM-9-2350-311-20-1

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS

AUGUST 1994

TM-9-2350-311-20-1 - Page 554 of 1275

Use care when sliding exhaust manifold down past exhaust gasket so not to bend or

damage gasket or exhaust leaks will result.

Do not tighten or torque exhaust manifold nuts until crossover tube has been

installed.

Ensure locating pads on exhaust manifold rest on cylinder block locating pads.

3 Install right exhaust manifold (4) onto cylinder head by sliding downward between gasket and retainers.

4 Position two clamps (2) on exhaust crossover tube (3). Install exhaust crossover tube between exhaust

manifolds (4 and 5).

5 Secure crossover tube (3) to exhaust manifolds (4 and 5) with two clamps (2) and two nuts(1).

6 For engine model 7083-7396, toque five locking nuts (6), securing right exhaust manifold (4) to cylinder head

to 30-35 Ib-ft (41-47 Nom), starting from enter and worldng outward alternately toward either end. For engine

model 7083-7391, toque five locking nuts to 43-48 Ib-ft (59-67 Nom).

ENGINE MODEL 7083-7391 SHOWN

NOTE

FOLLOW-ON MAINTENANCE:

Install air inlet manifold (para 5-15)

Install turbocharger oil return line (para 5-16)

Install turbocharger oil supply line (para 5-16)

5-33/(5-34 blank)

NOT

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CAUTION