This document provides instructions for removing and installing an alternator, electric starting motor, governor control motor, and fuel priming pump on a 321C LCR excavator. It includes detailed photos and steps for each component. Key steps include disconnecting electrical connections, removing mounting bolts, and installing replacement components in the reverse order of removal. Safety notices are included to contain any fluids that may drain during the process.
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2. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 321C EXCAVATOR MCF
Configuration: 321C LCR Hydraulic Excavator MCF00001-UP (MACHINE) POWERED BY 3066 Engine
Disassembly and Assembly
321C CR Excavator Engine Supplement
Media Number -RENR7107-06 Publication Date -01/06/2013 Date Updated -28/06/2013
i01923461
Alternator - Remove and Install
SMCS - 1405-010
S/N - MCF1-UP
Removal Procedure
Start By:
A. Deactivate the electrical system. Refer to Operation and Maintenance Manual, "Battery
Disconnect Switch" in order to deactivate the electrical system.
Illustration 1 g01000928
Rear view of the alternator
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3. 1. Remove the nut and the washer behind rubber boot (3). Disconnect the wire behind the
rubber boot.
2. Disconnect electrical connections (2) and (4) from alternator (1) .
3. Remove bolt (5) in order to disconnect the ground wires from alternator (1) .
4. Remove bolt (6) and reposition the harness assembly away from alternator (1) .
Illustration 2 g01000930
5. Adjust bolt (9) in order to release the tension on bolt (7). Remove bolt (7). Reposition the
alternator and remove belt (8) .
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4. Illustration 3 g01000931
6. Remove bolt (10) from the alternator.
Illustration 4 g01000932
7. Support alternator (1). Remove bolt (11) from alternator (1) .
8. Remove alternator (1) from the machine.
Installation Procedure
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5. Illustration 5 g01000932
1. Position alternator (1) and install bolt (9) .
Illustration 6 g01000931
2. Install bolt (10) to the alternator.
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6. Illustration 7 g01000930
3. Install belt (8) .
4. Reposition the alternator in order to put a slight tension on belt (8). Install bolt (7). Adjust
bolt (9) in order to adjust the tension on belt (8). Refer to Operation and Maintenance
Manual, "Belts - Inspect/Adjust/Replace".
Illustration 8 g01000928
Rear view of the alternator
5. Position the harness assembly and install bolt (6) to alternator (1) .
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7. 6. Connect the ground wires and install bolt (5) .
7. Connect electrical connections (2) and (4) to alternator (1) .
8. Connect the wire that is behind rubber boot (3). Install the washer and the nut that is located
behind rubber boot (3). Position rubber boot (3) on the alternator.
End By: Activate the electrical system. Refer to Operation and Maintenance Manual, "Battery
Disconnect Switch" in order to activate the electrical system.
Copyright 1993 - 2019 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
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8. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 321C EXCAVATOR MCF
Configuration: 321C LCR Hydraulic Excavator MCF00001-UP (MACHINE) POWERED BY 3066 Engine
Disassembly and Assembly
321C CR Excavator Engine Supplement
Media Number -RENR7107-06 Publication Date -01/06/2013 Date Updated -28/06/2013
i02211865
Electric Starting Motor - Remove and Install
SMCS - 1453-010
S/N - MCF1-UP
Removal Procedure
Start By:
A. Remove the counterweights. Refer to Disassembly and Assembly, "Counterweight -
Remove and Install".
B. Remove the hood. Refer to Disassembly and Assembly, "Hood - Remove and Install".
1. Turn the battery disconnect switch to the OFF position.
Note: Put identification marks on all wires and harness assemblies for installation purposes.
Illustration 1 g01007010
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9. 2. Remove rubber boot (2). Slide rubber boot (2) down battery cable (1) in order to access the
nut under the rubber boot.
Illustration 2 g01007012
3. Remove nut (3). Disconnect battery cable (1) .
Illustration 3 g01007013
4. Remove bolt (4) and cover (5) .
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11. Illustration 6 g01007017
1. Position electric starting motor (8) and install nuts (9) .
Illustration 7 g01007016
2. Connect grounding strap (7). Install bolt (6). Tighten bolt (6) to a torque of 3.5 ± 1.0 N·m
(31 ± 9 lb in).
Illustration 8 g01007013
3. Position cover (5) and install bolt (4) .
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12. Illustration 9 g01007012
4. Connect battery cable (1). Install nut (3). Tighten nut (3) to a torque of 11 ± 1 N·m (97 ± 9
lb in).
Illustration 10 g01007010
5. Install rubber boot (2) over the nut that connects battery cable (1) .
6. Turn the battery disconnect switch to the ON position.
End By:
a. Install the hood. Refer to Disassembly and Assembly, "Hood - Remove and Install".
b. Install the counterweights. Refer to Disassembly and Assembly, "Counterweight - Remove
and Install".
Copyright 1993 - 2019 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
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13. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 321C EXCAVATOR MCF
Configuration: 321C LCR Hydraulic Excavator MCF00001-UP (MACHINE) POWERED BY 3066 Engine
Disassembly and Assembly
321C CR Excavator Engine Supplement
Media Number -RENR7107-06 Publication Date -01/06/2013 Date Updated -28/06/2013
i01906909
Governor Control Motor - Remove and Install
SMCS - 1716-011; 1716-012
S/N - MCF1-UP
Removal Procedure
Illustration 1 g00711956
1. Remove two bolts (3) and the washers from the hinge.
2. Remove three bolts (1) and the washers in order to remove access panel (2) .
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14. Illustration 2 g00712442
3. Remove three bolts (5) and the washers in order to remove access panel (4) .
4. Open the engine hood.
Illustration 3 g00711961
5. Remove two nuts (6) that secure governor linkage (7) to the fuel injection pump.
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15. Illustration 4 g00711972
6. Loose nut (8) and (9) that secures governor linkage (7) to the engine.
Illustration 5 g00711979
7. Remove two bolts (10) and the washers in order to remove two clamps (11) that secure the
governor linkage to the chassis.
Note: Some models may only have one clamp (11) .
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16. Illustration 6 g00711980
8. Disconnect electrical connector (13) .
9. Remove two bolts (14) and the two washers. Remove governor control motor (12) .
Installation Procedure
Illustration 7 g00711980
1. Position governor control motor (12) on the mounting bracket. Install the two washers and
two bolts (14) .
2. Connect electrical connector (13) .
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17. Illustration 8 g00711979
3. Install two clamps (11) that secure the governor linkage to the chassis.
Note: Some models may only have one clamp (11) .
4. Install two bolts (10) and the washers that hold clamps (11) in position.
Illustration 9 g00711972
5. Install governor linkage (7). Fasten governor linkage (7) with nut (8) and nut (9) .
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18. Illustration 10 g00711961
6. Install governor linkage (7) to the fuel injection pump. Fasten governor linkage (7) with
washers and two nuts (6) .
Illustration 11 g00712442
7. Install access panel (4). Install the washers and three bolts (5) .
Illustration 12 g00711956
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19. 8. Install access panel (2). Install the washers and three bolts (1) .
9. Install the washers and two bolts (3) to the hinge.
10. Close the engine hood.
11. Check the governor actuator.
Reference: Refer to Systems Operation/Testing and Adjusting, "Governor Actuator -
Calibrate" for further information.
Copyright 1993 - 2019 Caterpillar Inc.
All Rights Reserved.
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20. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 321C EXCAVATOR MCF
Configuration: 321C LCR Hydraulic Excavator MCF00001-UP (MACHINE) POWERED BY 3066 Engine
Disassembly and Assembly
321C CR Excavator Engine Supplement
Media Number -RENR7107-06 Publication Date -01/06/2013 Date Updated -28/06/2013
i01923462
Fuel Priming Pump - Remove and Install
SMCS - 1258-010
S/N - MCF1-UP
Removal Procedure
NOTICE
Care must be taken to ensure that fluids are contained during
performance of inspection, maintenance, testing, adjusting and repair
of the product. Be prepared to collect the fluid with suitable containers
before opening any compartment or disassembling any component
containing fluids.
Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop
Products Guide" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
Dispose of all fluids according to local regulations and mandates.
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21. Thank you very much for
your reading. Please Click
Here. Then Get COMPLETE
MANUAL. NO WAITING
NOTE:
If there is no response to
click on the link above,
please download the PDF
document first and then
click on it.
22. Illustration 1 g01006488
1. Open the hood.
2. Remove bolts (2) .
3. Remove fuel priming pump (1) .
Note: Fuel will drain from the fuel priming pump during the removal. Collect the fuel in a
suitable container for storage or disposal.
4. Remove the gasket.
Installation Procedure
NOTICE
Care must be taken to ensure that fluids are contained during
performance of inspection, maintenance, testing, adjusting and repair
of the product. Be prepared to collect the fluid with suitable containers
before opening any compartment or disassembling any component
containing fluids.
Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop
Products Guide" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
Dispose of all fluids according to local regulations and mandates.
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23. Illustration 2 g01006488
Note: O-rings, gaskets, and seals should always be replaced.
1. Clean the surfaces that make contact with the gasket. Install a new gasket.
2. Position fuel priming pump (1) .
3. Install bolts (2) .
4. Close the hood.
Copyright 1993 - 2019 Caterpillar Inc.
All Rights Reserved.
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24. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 321C EXCAVATOR MCF
Configuration: 321C LCR Hydraulic Excavator MCF00001-UP (MACHINE) POWERED BY 3066 Engine
Disassembly and Assembly
321C CR Excavator Engine Supplement
Media Number -RENR7107-06 Publication Date -01/06/2013 Date Updated -28/06/2013
i01934132
Fuel Filter (Primary) and Fuel Filter Base - Remove and
Install
SMCS - 1261-010; 1262-010
S/N - MCF1-UP
Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
(A) 185-3630 Strap Wrench Assembly 1
NOTICE
Care must be taken to ensure that fluids are contained during
performance of inspection, maintenance, testing, adjusting and repair
of the product. Be prepared to collect the fluid with suitable containers
before opening any compartment or disassembling any component
containing fluids.
Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop
Products Guide" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
Dispose of all fluids according to local regulations and mandates.
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25. Illustration 1 g01006493
1. Open hood (1) .
Illustration 2 g01006494
2. Use Tooling (A) to remove fuel filter (6) (not shown) from fuel filter base (5) .
3. Remove two banjo bolts (3) and the gaskets (not shown) in order to disconnect fuel lines (4)
from fuel filter base (5) .
Note: Cap all openings or plug all openings immediately in order to prevent contamination
of the fuel system.
4. Remove two bolts (2) .
5. Remove fuel filter base (5) .
Installation Procedure
NOTICE
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26. Care must be taken to ensure that fluids are contained during
performance of inspection, maintenance, testing, adjusting and repair
of the product. Be prepared to collect the fluid with suitable containers
before opening any compartment or disassembling any component
containing fluids.
Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop
Products Guide" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
Dispose of all fluids according to local regulations and mandates.
Illustration 3 g01006494
1. Position fuel filter base (5) and install bolts (2) .
2. Install banjo bolts (3) and the gaskets (not shown) in order to connect fuel lines (4) to fuel
filter base (5) .
3. Install fuel filter (6) (not shown) on the fuel filter base (5). The fuel filter is hand tightened
only.
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