This manual offers complete technical information on the 277C CATERPILLAR Multi Terrain Loader, including diagnostics, programming, and maintenance. It contains step-by-step instructions to help service technicians quickly and accurately diagnose and repair problems. With 277C CATERPILLAR Multi Terrain Loader, technicians can confidently work on their equipment knowing they have access to the latest information.

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Media Number -KENR5191-03 Publication Date -01/08/2011
Product: MULTI TERRAIN LOADER
Model: 277C MULTI TERRAIN LOADER JWF
Configuration: 277C Multi Terrain Loader JWF00001-UP (MACHINE) POWERED BY 3044C Engine
Date Updated -17/08/2011
i 02667975
Disassembly and Assembly
279C2 Compact Track Loader and 287C, 277C, 277C2 and 297C Multi
Terrain Loaders Engine Supplement
Removal Procedure
Air Cleaner - Remove and Install
SMCS - 1051-010
1.Tilt the radiator. Refer to Operation and Maintenance Manual, "Radiator Tilting".
2.Disconnect harness assembly (2). Disconnect hoses (1) and (5). Remove bolts (3) and air
cleaner (4).
Illustration 1 g01340815

3. Installation Procedure
1.Tilt the radiator. Refer to Operation and Maintenance Manual, "Radiator Tilting".
2.Position air cleaner (4) and install bolts (3). Connect hoses (1) and (5). Connect harness
assembly (2).
3.Tilt the radiator back to the original position. Refer to Operation and Maintenance Manual,
"Radiator Tilting".
Illustration 2 g01340815
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Media Number -KENR6941-04 Publication Date -01/03/2012
Product: MULTI TERRAIN LOADER
Model: 277C MULTI TERRAIN LOADER JWF
Configuration: 277C Multi Terrain Loader JWF00001-UP (MACHINE) POWERED BY 3044C Engine
Date Updated -01/03/2012
i 02638747
Disassembly and Assembly
C3.4 Engines for Caterpillar Built Machines
Removal Procedure
Exhaust Manifold - Remove and Install
SMCS - 1059-010
Hot engine components can cause injury from burns. Before
performing maintenance on the engine, allow the engine and the
components to cool.
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
Start By:
A.If the engine is equipped with a turbocharger, remove the turbocharger. Refer to Disassembly
and Assembly, "Turbocharger - Remove".
NOTICE

5. Illustration 1
Exhaust manifold from a naturally aspirated engine
g01333088
Tool
A
Table 1
Required Tools
Part NumberPart Description
Guide Stud
-
(M8 x 1.25 by 100 mm)
Qty
2
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
1.Loosen bolts (1) .
Note: In order to prevent distortion of the exhaust manifold, Loosen the outer bolts first.
2.Remove bolts (1) and remove exhaust manifold (2) from the cylinder head.
3.Remove gasket (3) .
Installation Procedure
NOTICE

6. 1.Ensure that the exhaust manifold is clean and free from damage. Clean the joint surface of the
cylinder head.
2.Install Tooling (A) to the cylinder head in positions (X) .
3.Position a new exhaust manifold gasket (3) onto Tooling (A) .
Note: Ensure that the exhaust manifold gasket is correctly oriented.
4.Align exhaust manifold (2) with Tooling (A). Install the exhaust manifold to the cylinder head.
5.Install bolts (1) finger tight.
6.Remove Tooling (A). Install the remaining bolts (1) finger tight.
7.Tighten bolts (1) to a torque of 30 N·m (22 lb ft).
Note: Tighten the center bolts first.
End By: If the engine is equipped with a turbocharger, install the turbocharger. Refer to Disassembly
and Assembly, "Turbocharger - Install".
Illustration 2
Exhaust manifold from a naturally aspirated engine
g01333101
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Fri Dec 9 15:00:25 UTC+0530 2022

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Media Number -RENR7582-07 Publication Date -01/01/2010
Product: MULTI TERRAIN LOADER
Model: 277C MULTI TERRAIN LOADER JWF
Configuration: 277C Multi Terrain Loader JWF00001-UP (MACHINE) POWERED BY 3044C Engine
Date Updated -26/02/2010
i 02003443
Disassembly and Assembly
3044C Industrial Engine and Engines for Caterpillar Built Machines
Removal Procedure
Exhaust Manifold - Remove and Install
SMCS - 1059-010
Hot engine components can cause injury from burns. Before
performing maintenance on the engine, allow the engine and the
components to cool.
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
Start By:
A.Remove the turbocharger, if equipped. Refer to Disassembly and Assembly, "Turbocharger -
Remove".
NOTICE

9. Illustration 1
Illustration 2
g01036153
g01036153
1.Remove bolts (1). Remove exhaust manifold (3) and gasket (2) .
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
1.Install gasket (2) and exhaust manifold (3). Install bolts (1). Tighten the bolts, beginning at the
center of the exhaust manifold and working toward the ends, to the following torque:
Naturally aspirated engines ... 15 to 22 N·m (11 to 16 lb ft)
Installation Procedure
NOTICE

10. Turbocharged engines ... 28 to 33 N·m (21 to 24 lb ft)
End By: Install the turbocharger, if equipped. Refer to Disassembly and Assembly, "Turbocharger -
Install".
Copyright 1993 - 2022 Caterpillar Inc.
All Rights Reserved.
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11. Previous Screen
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Media Number -KENR6941-04 Publication Date -01/03/2012
Product: MULTI TERRAIN LOADER
Model: 277C MULTI TERRAIN LOADER JWF
Configuration: 277C Multi Terrain Loader JWF00001-UP (MACHINE) POWERED BY 3044C Engine
Date Updated -01/03/2012
i 02638747
Disassembly and Assembly
C3.4 Engines for Caterpillar Built Machines
Removal Procedure
Exhaust Manifold - Remove and Install
SMCS - 1059-010
Hot engine components can cause injury from burns. Before
performing maintenance on the engine, allow the engine and the
components to cool.
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
Start By:
A.If the engine is equipped with a turbocharger, remove the turbocharger. Refer to Disassembly
and Assembly, "Turbocharger - Remove".
NOTICE

12. Illustration 1
Exhaust manifold from a naturally aspirated engine
g01333088
Tool
A
Table 1
Required Tools
Part NumberPart Description
Guide Stud
-
(M8 x 1.25 by 100 mm)
Qty
2
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
1.Loosen bolts (1) .
Note: In order to prevent distortion of the exhaust manifold, Loosen the outer bolts first.
2.Remove bolts (1) and remove exhaust manifold (2) from the cylinder head.
3.Remove gasket (3) .
Installation Procedure
NOTICE

13. 1.Ensure that the exhaust manifold is clean and free from damage. Clean the joint surface of the
cylinder head.
2.Install Tooling (A) to the cylinder head in positions (X) .
3.Position a new exhaust manifold gasket (3) onto Tooling (A) .
Note: Ensure that the exhaust manifold gasket is correctly oriented.
4.Align exhaust manifold (2) with Tooling (A). Install the exhaust manifold to the cylinder head.
5.Install bolts (1) finger tight.
6.Remove Tooling (A). Install the remaining bolts (1) finger tight.
7.Tighten bolts (1) to a torque of 30 N·m (22 lb ft).
Note: Tighten the center bolts first.
End By: If the engine is equipped with a turbocharger, install the turbocharger. Refer to Disassembly
and Assembly, "Turbocharger - Install".
Illustration 2
Exhaust manifold from a naturally aspirated engine
g01333101
Copyright 1993 - 2022 Caterpillar Inc.
All Rights Reserved.
Fri Dec 9 15:01:22 UTC+0530 2022

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15. Previous Screen
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Media Number -RENR7582-07 Publication Date -01/01/2010
Product: MULTI TERRAIN LOADER
Model: 277C MULTI TERRAIN LOADER JWF
Configuration: 277C Multi Terrain Loader JWF00001-UP (MACHINE) POWERED BY 3044C Engine
Date Updated -26/02/2010
i 02003443
Disassembly and Assembly
3044C Industrial Engine and Engines for Caterpillar Built Machines
Removal Procedure
Exhaust Manifold - Remove and Install
SMCS - 1059-010
Hot engine components can cause injury from burns. Before
performing maintenance on the engine, allow the engine and the
components to cool.
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
Start By:
A.Remove the turbocharger, if equipped. Refer to Disassembly and Assembly, "Turbocharger -
Remove".
NOTICE

16. Illustration 1
Illustration 2
g01036153
g01036153
1.Remove bolts (1). Remove exhaust manifold (3) and gasket (2) .
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
1.Install gasket (2) and exhaust manifold (3). Install bolts (1). Tighten the bolts, beginning at the
center of the exhaust manifold and working toward the ends, to the following torque:
Naturally aspirated engines ... 15 to 22 N·m (11 to 16 lb ft)
Installation Procedure
NOTICE

17. Turbocharged engines ... 28 to 33 N·m (21 to 24 lb ft)
End By: Install the turbocharger, if equipped. Refer to Disassembly and Assembly, "Turbocharger -
Install".
Copyright 1993 - 2022 Caterpillar Inc.
All Rights Reserved.
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18. Previous Screen
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Media Number -RENR7582-07 Publication Date -01/01/2010
Product: MULTI TERRAIN LOADER
Model: 277C MULTI TERRAIN LOADER JWF
Configuration: 277C Multi Terrain Loader JWF00001-UP (MACHINE) POWERED BY 3044C Engine
Date Updated -26/02/2010
i 02001241
Disassembly and Assembly
3044C Industrial Engine and Engines for Caterpillar Built Machines
Installation Procedure
Inlet Manifold - Install
SMCS - 1058-012
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
NOTICE
Illustration 1 g01035495

19. 1.
2.Install gasket (3) and position inlet manifold (2). Install bolts (1). Install bolts (4) and (5).
Connect the hose assembly and tighten clamp (7). Position crankcase breather (8) and install
bolts (6) .
Install gasket (13) and elbow assembly (12). Install bolts (11). Install bracket (10) and bolt (9) .
Illustration 2 g01035474
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Media Number -KENR6941-04 Publication Date -01/03/2012
Product: MULTI TERRAIN LOADER
Model: 277C MULTI TERRAIN LOADER JWF
Configuration: 277C Multi Terrain Loader JWF00001-UP (MACHINE) POWERED BY 3044C Engine
Date Updated -01/03/2012
i 02638751
Disassembly and Assembly
C3.4 Engines for Caterpillar Built Machines
Removal Procedure
Inlet Manifold - Remove and Install
SMCS - 1058-010
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
Start By:
A.Remove the fuel injection lines. Refer to Disassembly and Assembly, "Fuel Injection Lines -
Remove and install".
NOTICE

21. Illustration 1
Typical example
Illustration 2
Typical example
g01333458
g01333457
1.Loosen the hose clamps and disconnect the air hose (not shown) from connection (3) .

22. 1.Ensure that all mating surfaces are clean and free from debris.
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
2.For naturally aspirated engines, disconnect the hose for the crankcase breather (not shown)
from inlet manifold (1) .
For turbocharged engines, remove the bolt that secures the hose for the crankcase breather (not
shown) from the inlet manifold (1) .
3.Remove bolts (6) from inlet manifold (1). Note the position of any brackets that are retained by
the bolts for installation.
4.Remove inlet manifold (1) and gasket (5) from the cylinder head.
5.If necessary, remove bolts (4) and remove connection (3) from inlet manifold (1). Remove
gasket (2) .
Installation Procedure
NOTICE
Illustration 3 g01333458

23. Typical example
Illustration 4
Typical example
g01333457
2.If necessary, position a new gasket (2) and connection (3) onto inlet manifold (1). Install bolts
(4). Tighten the bolts to a torque of 11 N·m (97 lb in).
Note: Ensure correct orientation of the connection.
3.Place a new gasket (5) in position on inlet manifold (1) .
4.Position inlet manifold (1) on the cylinder head.
5.Install bolts (6). Ensure that bolts of different lengths are installed in the correct positions. Also
ensure that any brackets that are retained by the bolts are installed in the correct positions.
6.Tighten bolts (6) to a torque of 18 N·m (13 lb ft).
7.For naturally aspirated engines, connect the hose for the crankcase breather (not shown) to inlet
manifold (1) .
For turbocharged engines, install the bolt that secures the hose for the crankcase breather (not
shown) to the inlet manifold (1). Tighten the bolt to a torque of 11 N·m (97 lb in).
8.Connect the air hose (not shown) to connection (3) and tighten the hose clamps securely.

24. End By: Install the fuel injection lines. Refer to Disassembly and Assembly, "Fuel Injection Lines -
Remove and install".
Copyright 1993 - 2022 Caterpillar Inc.
All Rights Reserved.
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25. Previous Screen
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Media Number -RENR7582-07 Publication Date -01/01/2010
Product: MULTI TERRAIN LOADER
Model: 277C MULTI TERRAIN LOADER JWF
Configuration: 277C Multi Terrain Loader JWF00001-UP (MACHINE) POWERED BY 3044C Engine
Date Updated -26/02/2010
i 02001104
Disassembly and Assembly
3044C Industrial Engine and Engines for Caterpillar Built Machines
Removal Procedure
Inlet Manifold - Remove
SMCS - 1058-011
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
Table 1
Required Tools
ToolPart NumberPart DescriptionQty
9U-7087 Tapered Cap/Plug 1
ZZ
9U-7089 Tapered Cap/Plug 1
Note: SERVICE DATA: TOOLING (ZZ) WILL NOT BE IDENTIFIED IN PHOTOGRAPHS
IN THE REMOVAL OR THE INSTALLATION. THIS TOOLING IS SHOWN IN ORDER
TO ASSIST THE EXPERIENCED SERVICEMAN.
NOTICE

26. Illustration 1
Illustration 2
g01035474
g01035495
1.Remove bolts (6) and position crankcase breather (8) out of the way. Loosen clamp (7) and
disconnect the hose assembly. Remove bolts (4) and (5). Remove bolts (1). Remove inlet
manifold (2) and gasket (3) .
2.Remove bolt (9) and bracket (10). Remove bolts (11). Remove elbow assembly (12) and gasket
(13) .
Copyright 1993 - 2022 Caterpillar Inc.
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Media Number -KENR5191-03 Publication Date -01/08/2011
Product: MULTI TERRAIN LOADER
Model: 277C MULTI TERRAIN LOADER JWF
Configuration: 277C Multi Terrain Loader JWF00001-UP (MACHINE) POWERED BY 3044C Engine
Date Updated -17/08/2011
i 02675003
Disassembly and Assembly
279C2 Compact Track Loader and 287C, 277C, 277C2 and 297C Multi
Terrain Loaders Engine Supplement
Removal Procedure
Muffler - Remove and Install
SMCS - 1062-010

28. Illustration 1
Illustration 2 g01041438
g01041430
Tool
A
B
Table 1
Required Tools
Part NumberPart Description
5P-3931 Anti-Seize Compound
9S-3263 Thread Lock Compound
Qty
-
-
1.Remove bolts (1). Disconnect harness assembly (5). Remove bolts (2). Remove nut (4).
Remove muffler (3).
2.Remove gasket (6) from muffler (3). Note the orientation of the gasket for installation purposes.
Installation Procedure

29. Illustration 3 g01041438
1.Install gasket (6) onto muffler (3). Note the orientation of the gasket. The raised face should
mate to the muffler flange.

30. Illustration 4 g01041430
2.Apply Tooling (A) to the threads of bolts (1) and to the mating surface of bolts (1). Apply
Tooling (B) to the threads of nut (4).
3.Position muffler (3). Install bolts (1) and (2).
Note: Bolts (1) need to be tightened first in order to properly seat gasket (6).
4.First, tighten bolts (1) to a torque of 3.5 N·m (31 lb in). Next, tighten bolts (2) to a torque of
3.5 N·m (31 lb in).
5.Bolts (1) can now be tightened to a final torque of 20 ± 5 N·m (15± 4 lb ft).
6.Tighten bolts (2) to a torque of 22 ± 5 N·m (17 ± 4 lb ft).
7.Install nut (4). Connect harness assembly (5).
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