REPLACE/INSPECT/REPAIR PISTON AND CONNECTING ROD ASSEMBLY.

Figure 6-18. Removing and Installing Piston and Connecting Rod Assembly

TM-10-4320-325-14 Pump Unit Centrifugal Diesel-Driven Self-Priming Introduction 1-1 125 GPM Water Class III (NSN 4320-01-357-1930) Manual
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TM 10-4320-325-14

6-10. REPLACE/INSPECT/REPAIR PISTON AND CONNECTING ROD ASSEMBLY.

This task covers:

a. Removal

c. Inspection

b. Inspection

d. Installation

INITIAL SETUP:

Tools

Materials/Parts

Tool Kit, General Mechanics (Item 1,

Diesel fuel (Item 2, Appendix E, Section II)

Appendix B, Section III)

Snap Ring Pliers (Item 3,

Plastigage, PG-1 (70220)

Appendix B, Section III)

Lubricating oil (Item 3, Appendix E, Section II)

Piston Ring Expander (Item 3,

Appendix B, Section III)

Piston Ring Groove Cleaner (Item 3,

Equipment

Appendix B, Section III)

Condition

Piston Ring Compressor (Item 3,

Para

Appendix B. Section III)

6-8

Camshaft removed

Torque Wrench, 0-175 In-lb (Item 3,

6-9

Balancer shaft removed

Appendix B, Section III)

REMOVAL Refer to Figure 6-18

a. Remove carbon deposited on the upper Inside surface of the cylinder before extracting the piston

b. Remove two connecting rod mounting bolts (1), nuts (2), and washers (3)

c. Remove connecting rod cap (4)

d Rotate crankshaft to the top of the piston stroke and pull out piston

e. Remove both snap lock rings (6)

WARNING

Heated parts can result In severe bums. Exercise care In handling the heated parts.

CAUTION

Avoid heating piston directly with a torch.

f. Heat piston (5) and piston pin (7) to 160-180"F

g. Remove piston pin (7) from piston (5)

h. Connecting rod (8) can now be separated from piston

6-20

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