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Service Repair Manual
Models
303E CR Mini
Hydraulic Excavator
Shutdown SIS
Previous Screen
Product: MINI HYD EXCAVATOR
Model: 303E CR MINI HYD EXCAVATOR CK3
Configuration: 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3 Engine
Disassembly and Assembly
C1.3 Engine for Caterpillar Built Machines
Media Number -UENR3292-03 Publication Date -01/05/2014 Date Updated -02/02/2017
i05350789
Fuel Injection Lines - Remove and Install
SMCS - 1252-010
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.
Dispose of all fluids according to local regulations and mandates.
Illustration 1 g03367036
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1. Loosen fuel injection line nuts (1) that hold fuel injection lines (2) to the injectors.
Illustration 2 g03389245
Note: Use two wrenches to loosen fuel injector nuts (3). Hold nut (4) on fuel injector pump
stationary.
Note: If the fuel injection pump nut (4) turns, a leak can occur. In order to repair the
leak, the pump will need to be sent to an authorized pump service shop.
1. Loosen fuel injection line nuts (3). Remove fuel injection lines (2).
Installation Procedure
1. Install fuel injection lines (2) in the reverse order of removal.
a. Tighten fuel injection line nut (1) and (3) to a torque of 25 to 34 N·m
(221 to 300 lb in).
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
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Shutdown SIS
Previous Screen
Product: MINI HYD EXCAVATOR
Model: 303E CR MINI HYD EXCAVATOR CK3
Configuration: 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3 Engine
Disassembly and Assembly
C1.3 Engine for Caterpillar Built Machines
Media Number -UENR3292-03 Publication Date -01/05/2014 Date Updated -02/02/2017
i05317149
Governor - Remove
SMCS - 1264-011
Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-1859 Retaining Ring Pliers 1
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
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Illustration 1 g03381347
1. Before removing the governor assembly, align the timing marks on all gears on the front of
the engine.
Illustration 2 g03370058
1. Remove bolts (1) and speed control plate (2). Remove stop solenoid (2A).
Illustration 3 g03370061
2. Disconnect governor spring (3) from speed control plate (2). Remove governor spring (3).
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Illustration 4 g03370069
3. Remove start spring (4) from thrust lever (5).
Illustration 5 g03370075
Illustration 6 g03381361
4. Remove bolts (6) and injector pump (7). Align the control rack pin (7A) with the notch in
the crankcase (7B).
Illustration 7 g03370082
5. Remove plug (8).
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Illustration 8 g03370176
Illustration 9 g03370186
6. Measure the height of max torque limiter (8) from block and record for installation
purposes. Remove max torque limiter (8).
Illustration 10 g03370189
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Illustration 11 g03370193
7. Remove plate (10). Use bolt (1) in order to pull shaft (12) and bearing collar (11) from the
governor housing.
Illustration 12 g03370379
8. Remove fork lever assembly (13) from the governor housing.
Illustration 13 g03370397
9. Remove fuel camshaft stopper (14) and fuel camshaft gear assembly (15).
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Illustration 14 g03370400
Illustration 15 g03370402
Illustration 16 g03370401
10. Remove plug (16). Using Tooling (A) remove retaining ring (17). Remove governor shaft
and gear assembly (18).
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Illustration 17 g03370504
11. Remove setscrew (19) and bearing (20). Remove bearing (21).
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
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Shutdown SIS
Previous Screen
Product: MINI HYD EXCAVATOR
Model: 303E CR MINI HYD EXCAVATOR CK3
Configuration: 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3 Engine
Disassembly and Assembly
C1.3 Engine for Caterpillar Built Machines
Media Number -UENR3292-03 Publication Date -01/05/2014 Date Updated -02/02/2017
i05318443
Governor - Install
SMCS - 1264-012
Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-1859 Retaining Ring Pliers 1
B 442-0744 Bushing Tool 1
C - Loctite 593 Silicone Sealer
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
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Illustration 1 g03370555
Illustration 2 g03381410
1. Install bearing (20). Apply Tooling (C) to set screw (19). Install set screw (19) until the
tapered part contacts the bearing (20) as shown. Using Tooling (B), install bearing (21).
Illustration 3 g03370558
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Illustration 4 g03370578
Illustration 5 g03370582
2. Install governor shaft and gear assembly (18). Install retaining ring (17) on shaft. Install
plug (16).
Illustration 6 g03370616
3. Install fuel camshaft gear assembly (15). Make sure to line up timing marks on gears upon
installation. Install fuel camshaft stopper (14).
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Illustration 7 g03370617
4. Install fork lever assembly (13) into the governor housing.
Illustration 8 g03370618
Illustration 9 g03370620
5. Use bolt (1) in order to install shaft (12) into the governor housing and fork lever assembly
(13). Install bearing collar (11). Install plate (10).
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Illustration 10 g03370636
Illustration 11 g03370637
6. Install max torque limiter (9) to the Pre measured height recorded from disassembly.
Illustration 12 g03370639
7. Apply Tooling (C) on plug (8). Install plug (8).
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Illustration 13 g03381440
Illustration 14 g03370640
Note: Addition or reduction of shims 0.05 mm (0.002 inch) delays or advances the
injection timing by approximately 0.0087 rad (0.5). In disassembling and replacing, be
sure to use the same thickness of new shims that are being replaced.
8. Place new shims (7) to the amount of thickness recorded from the removal procedure. When
installing injection pump (6) insert the rack pin into the groove (6) of the thrust lever on the
fork. Install injector pump (5). Install the bolts.
Illustration 15 g03370658
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9. Install start spring (4) onto the thrust lever.
Illustration 16 g03370659
10. Install governor spring (3). Connect governor spring (3) to speed control plate (2).
Illustration 17 g03370660
11. Place Tooling (C) onto the mounting surface of speed control plate (2). Install speed control
plate (2). Install bolts (1). Place Tooling (C) on stop solenoid (2A). Install stop solenoid
(2A).
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Mon Feb 24 22:07:24 UTC+0800 2020
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Shutdown SIS
Previous Screen
Product: MINI HYD EXCAVATOR
Model: 303E CR MINI HYD EXCAVATOR CK3
Configuration: 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3 Engine
Disassembly and Assembly
C1.3 Engine for Caterpillar Built Machines
Media Number -UENR3292-03 Publication Date -01/05/2014 Date Updated -02/02/2017
i05319637
Fuel Injection Pump - Remove and Install
SMCS - 1251-010
Removal Procedure
Start By:
a. Remove fuel injection lines.
Illustration 1 g03371180
1. Remove solenoid (1). Remove bolts (2) and speed control plate (3).
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Thank you very much for
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MANUAL. NO WAITING
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click on it.
Illustration 2 g03371184
2. Remove start spring (4).
Illustration 3 g03371170
Illustration 4 g03371249
3. Remove bolts (5) and fuel injection pump (6).
4. When removing the injection pump, align the control rack pin with the notch.
5. Remove shims (7) from under fuel injection pump (6). Record the number and thickness of
shims (7) for installation purposes.
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Installation Procedure
Illustration 5 g03371238
1. Place new shims (7) to the amount of thickness recorded from the removal procedure. When
installing injection pump (6) align the control rack pin with the notch. Insert the rack pin
into groove (8) of the thrust lever on the fork.
Note: Addition or reduction of shims 0.05 mm (0.002 inch) delays or advances the
injection timing by approximately 0.0087 rad (0.5). In disassembling and replacing, be
sure to use the same thickness of new shims that are being replaced.
Illustration 6 g03371259
2. Install fuel injection pump (6). Install bolts (5).
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Illustration 7 g03371269
3. Install start spring (4).
Illustration 8 g03371286
4. Install speed control plate (3) and bolts (2). Install solenoid (1).
End By:
a. Install the fuel injection lines.
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Mon Feb 24 22:08:21 UTC+0800 2020
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  • 1. Service Repair Manual Models 303E CR Mini Hydraulic Excavator
  • 2. Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 303E CR MINI HYD EXCAVATOR CK3 Configuration: 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3 Engine Disassembly and Assembly C1.3 Engine for Caterpillar Built Machines Media Number -UENR3292-03 Publication Date -01/05/2014 Date Updated -02/02/2017 i05350789 Fuel Injection Lines - Remove and Install SMCS - 1252-010 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. Dispose of all fluids according to local regulations and mandates. Illustration 1 g03367036 1/2 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...
  • 3. 1. Loosen fuel injection line nuts (1) that hold fuel injection lines (2) to the injectors. Illustration 2 g03389245 Note: Use two wrenches to loosen fuel injector nuts (3). Hold nut (4) on fuel injector pump stationary. Note: If the fuel injection pump nut (4) turns, a leak can occur. In order to repair the leak, the pump will need to be sent to an authorized pump service shop. 1. Loosen fuel injection line nuts (3). Remove fuel injection lines (2). Installation Procedure 1. Install fuel injection lines (2) in the reverse order of removal. a. Tighten fuel injection line nut (1) and (3) to a torque of 25 to 34 N·m (221 to 300 lb in). Copyright 1993 - 2020 Caterpillar Inc. All Rights Reserved. Private Network For SIS Licensees. Mon Feb 24 22:05:31 UTC+0800 2020 2/2 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...
  • 4. Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 303E CR MINI HYD EXCAVATOR CK3 Configuration: 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3 Engine Disassembly and Assembly C1.3 Engine for Caterpillar Built Machines Media Number -UENR3292-03 Publication Date -01/05/2014 Date Updated -02/02/2017 i05317149 Governor - Remove SMCS - 1264-011 Removal Procedure Table 1 Required Tools Tool Part Number Part Description Qty A 1P-1859 Retaining Ring Pliers 1 NOTICE Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life. 1/7 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...
  • 5. Illustration 1 g03381347 1. Before removing the governor assembly, align the timing marks on all gears on the front of the engine. Illustration 2 g03370058 1. Remove bolts (1) and speed control plate (2). Remove stop solenoid (2A). Illustration 3 g03370061 2. Disconnect governor spring (3) from speed control plate (2). Remove governor spring (3). 2/7 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...
  • 6. Illustration 4 g03370069 3. Remove start spring (4) from thrust lever (5). Illustration 5 g03370075 Illustration 6 g03381361 4. Remove bolts (6) and injector pump (7). Align the control rack pin (7A) with the notch in the crankcase (7B). Illustration 7 g03370082 5. Remove plug (8). 3/7 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...
  • 7. Illustration 8 g03370176 Illustration 9 g03370186 6. Measure the height of max torque limiter (8) from block and record for installation purposes. Remove max torque limiter (8). Illustration 10 g03370189 4/7 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...
  • 8. Illustration 11 g03370193 7. Remove plate (10). Use bolt (1) in order to pull shaft (12) and bearing collar (11) from the governor housing. Illustration 12 g03370379 8. Remove fork lever assembly (13) from the governor housing. Illustration 13 g03370397 9. Remove fuel camshaft stopper (14) and fuel camshaft gear assembly (15). 5/7 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...
  • 9. Illustration 14 g03370400 Illustration 15 g03370402 Illustration 16 g03370401 10. Remove plug (16). Using Tooling (A) remove retaining ring (17). Remove governor shaft and gear assembly (18). 6/7 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...
  • 10. Illustration 17 g03370504 11. Remove setscrew (19) and bearing (20). Remove bearing (21). Copyright 1993 - 2020 Caterpillar Inc. All Rights Reserved. Private Network For SIS Licensees. Mon Feb 24 22:06:28 UTC+0800 2020 7/7 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...
  • 11. Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 303E CR MINI HYD EXCAVATOR CK3 Configuration: 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3 Engine Disassembly and Assembly C1.3 Engine for Caterpillar Built Machines Media Number -UENR3292-03 Publication Date -01/05/2014 Date Updated -02/02/2017 i05318443 Governor - Install SMCS - 1264-012 Removal Procedure Table 1 Required Tools Tool Part Number Part Description Qty A 1P-1859 Retaining Ring Pliers 1 B 442-0744 Bushing Tool 1 C - Loctite 593 Silicone Sealer NOTICE Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life. 1/7 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...
  • 12. Illustration 1 g03370555 Illustration 2 g03381410 1. Install bearing (20). Apply Tooling (C) to set screw (19). Install set screw (19) until the tapered part contacts the bearing (20) as shown. Using Tooling (B), install bearing (21). Illustration 3 g03370558 2/7 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...
  • 13. Illustration 4 g03370578 Illustration 5 g03370582 2. Install governor shaft and gear assembly (18). Install retaining ring (17) on shaft. Install plug (16). Illustration 6 g03370616 3. Install fuel camshaft gear assembly (15). Make sure to line up timing marks on gears upon installation. Install fuel camshaft stopper (14). 3/7 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...
  • 14. Illustration 7 g03370617 4. Install fork lever assembly (13) into the governor housing. Illustration 8 g03370618 Illustration 9 g03370620 5. Use bolt (1) in order to install shaft (12) into the governor housing and fork lever assembly (13). Install bearing collar (11). Install plate (10). 4/7 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...
  • 15. Illustration 10 g03370636 Illustration 11 g03370637 6. Install max torque limiter (9) to the Pre measured height recorded from disassembly. Illustration 12 g03370639 7. Apply Tooling (C) on plug (8). Install plug (8). 5/7 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...
  • 16. Illustration 13 g03381440 Illustration 14 g03370640 Note: Addition or reduction of shims 0.05 mm (0.002 inch) delays or advances the injection timing by approximately 0.0087 rad (0.5). In disassembling and replacing, be sure to use the same thickness of new shims that are being replaced. 8. Place new shims (7) to the amount of thickness recorded from the removal procedure. When installing injection pump (6) insert the rack pin into the groove (6) of the thrust lever on the fork. Install injector pump (5). Install the bolts. Illustration 15 g03370658 6/7 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...
  • 17. 9. Install start spring (4) onto the thrust lever. Illustration 16 g03370659 10. Install governor spring (3). Connect governor spring (3) to speed control plate (2). Illustration 17 g03370660 11. Place Tooling (C) onto the mounting surface of speed control plate (2). Install speed control plate (2). Install bolts (1). Place Tooling (C) on stop solenoid (2A). Install stop solenoid (2A). Copyright 1993 - 2020 Caterpillar Inc. All Rights Reserved. Private Network For SIS Licensees. Mon Feb 24 22:07:24 UTC+0800 2020 7/7 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...
  • 18. Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 303E CR MINI HYD EXCAVATOR CK3 Configuration: 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3 Engine Disassembly and Assembly C1.3 Engine for Caterpillar Built Machines Media Number -UENR3292-03 Publication Date -01/05/2014 Date Updated -02/02/2017 i05319637 Fuel Injection Pump - Remove and Install SMCS - 1251-010 Removal Procedure Start By: a. Remove fuel injection lines. Illustration 1 g03371180 1. Remove solenoid (1). Remove bolts (2) and speed control plate (3). 1/4 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...
  • 19. 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.
  • 20. Illustration 2 g03371184 2. Remove start spring (4). Illustration 3 g03371170 Illustration 4 g03371249 3. Remove bolts (5) and fuel injection pump (6). 4. When removing the injection pump, align the control rack pin with the notch. 5. Remove shims (7) from under fuel injection pump (6). Record the number and thickness of shims (7) for installation purposes. 2/4 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...
  • 21. Installation Procedure Illustration 5 g03371238 1. Place new shims (7) to the amount of thickness recorded from the removal procedure. When installing injection pump (6) align the control rack pin with the notch. Insert the rack pin into groove (8) of the thrust lever on the fork. Note: Addition or reduction of shims 0.05 mm (0.002 inch) delays or advances the injection timing by approximately 0.0087 rad (0.5). In disassembling and replacing, be sure to use the same thickness of new shims that are being replaced. Illustration 6 g03371259 2. Install fuel injection pump (6). Install bolts (5). 3/4 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...
  • 22. Illustration 7 g03371269 3. Install start spring (4). Illustration 8 g03371286 4. Install speed control plate (3) and bolts (2). Install solenoid (1). End By: a. Install the fuel injection lines. Copyright 1993 - 2020 Caterpillar Inc. All Rights Reserved. Private Network For SIS Licensees. Mon Feb 24 22:08:21 UTC+0800 2020 4/4 303ECR Mini Hydraulic Excavator CK300001-UP (MACHINE) POWERED BY C1.3... 2020/2/24 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...