Jacobsen LF 550, Техническое руководство по ремонту, Страница: 41 / 50

ENGINE
4241262-Rev B 3-9
3
6. Install insulating sleeve (5), tailpipe (6), and
U-bolt (3), and install, but do not tighten, two nuts (4).
7. Install two screws (7) and two lock washers (8).
Tighten screws (7) to 35–40 lb-ft (47.5–54.2 N·m).
8. Tighten two nuts (4).
Exhaust Manifold—Naturally
Aspirated Engine
Removal and Installation
See Figure 3-12.
!
WARNING
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Allow engine to cool completely.
3. Raise the hood.
4. Remove muffler and exhaust assembly. (See
“Muffler and Exhaust Assembly” on page 3-8.)
Figure 3-12
5. Remove eight nuts (1).
6. Remove exhaust manifold (3) and exhaust manifold
gasket (2).
Installation Notes
• Clean gasket surfaces.
• Use new gaskets during installation.
• Install exhaust manifold by reversing order of
removal.
Exhaust Manifold and Turbocharger
Removal and Installation
See Figure 3-13.
!
WARNING
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Allow engine to cool completely.
3. Raise the hood.
4. Remove muffler and exhaust assembly. (See
“Muffler and Exhaust Assembly” on page 3-8.)
Figure 3-13
5. Loosen hose clamps (9 and 1), and remove
hoses (12 and 2) from turbocharger (4).
6. Remove banjo fitting bolt (3) from turbocharger.
7. Disconnect oil feed tube (8) from engine oil pressure
switch.
8. Remove two screws (6) from turbocharger.
9. Remove oil return tube (7).
10. Remove screws (5), and remove turbocharger.
11. Remove eight nuts (11) and remove exhaust
manifold (10).
Installation Notes
• Clean gasket surfaces.
• Use new gaskets during installation.
• Install exhaust manifold and turbocharger assembly
by reversing order of removal.
Engine components will become hot during
operation. Allow engine components to cool
before performing service. Failure to follow
safety recommendations may result in injury.
1
TN3595
3
2
Engine components will become hot during
operation. Allow engine components to cool
before performing service. Failure to follow
safety recommendations may result in injury.
9
3
6
2
TN3876
1
12
4
11
7
8
10
5