THIS IS A MANUAL PRODUCED BY JENSALES INC. WITHOUT THE AUTHORIZATION OF CUMMINS OR IT’S SUCCESSORS. CUMMINS AND IT’S SUCCESSORS

ARE NOT RESPONSIBLE FOR THE QUALITY OR ACCURACY OF THIS MANUAL.

TRADE MARKS AND TRADE NAMES CONTAINED AND USED HEREIN ARE THOSE OF OTHERS, AND ARE USED HERE IN A DESCRIPTIVE SENSE TO REFER TO THE PRODUCTS OF OTHERS.

Service Manual

Serv

ice

Man

ual

6C8.3, 6CT8.3 & 6CTA8.3 Engines

CUM-S-C SERIES

http://www.jensales.com/products/cummins-engine-service-manual-cum-s-c-series.html

Shop Manual Table of Contents

Table of Contents Page i-3

Page

Introduction ................................................................................................................................. 1-51 Group 0 - Engine Disassembly and Assembly ................................................................................. 0-1 I Group 1 - Cylinder Block .............................................................................................................. 1-1 I Group 2 - Cylinder Head ............................................................................................................... 2-1 I Group 3 - Rocker levers .............................................................................................................. 3-1 I Group 4 - Tappets and Push Rods ........................................................................ , ....................... .4-1 I Group 5 - Fuel System ................................................................................................................. 5-1 I Group 6 - Injectors and Fuel lines ................................................................................................ 6-1 I Group 7 - lubricating System ....................................................................................................... 7-1 I Group 8 - Cooling System ............................................................................................................. 8-1 I Group 9 - Drive Units ................................................................................................................... 9-1 I Group 10 - Air Intake System ...................................................................................................... 1 0-1 I Group 11 - Exhaust System ......................................................................................................... 11-1 I Group 12 - Air Equipment ........................................................................................................... 12-1 I Group 13 - Electrical Equipment. ................................................................................................. 13-1 I Group 14 - Engine Testing .......................................................................................................... 14-1 I Group 16 - Mounting Adaptations ................................................................................................ 16-1 I

Engine Disassembly Page 0-10

Screwdriver

Remove the air crossover tube.

13mm

Remove the air intake cover plate or aftercooler.

10 and 19mm

Remove the fuel drain manifold. Discard the sealing washers.

10mm

Remove the injectors.

NOTE: An injector puller Part No. 3822482 is available for hard to remove injectors.

QJp Plug Replacement, Cylinder Head Page 2-16

30 Minutes

Warning: Use protective measures to prevent personal injury.

The cylinder head may be cleaned in a hot tank using a soap and water solution.

Apply a bead of Loctite™ 277 around the outside diameter of all cup plugs before installing.

Caution: The cup plugs and cup plug holes must be clean and free of oil before installing the cup plugs.

Drive all cup plugs in until the outer edge is flush with the counter sink.

Cup Plug Locations

1. 1.198 inch, six required

2. 58.06mm, two required

Accessory Drive Adapter Disassembly T Bar Puller

Remove the drive gear.

The shaft/bearing assembly will only press out in one direction.

Press the shaft and bearing assembly out as Illustrated.

Caution: Do not reuse the bearing after removing.

Press the shaft out of the bearing and discard the bearing.

Accessory Drive Adapter Assembly 1.50 inch ID Pipe Coupling

Support the inner race of the new bearing and press the shaft into the bearing until the shaft bottoms on the inner race.

Accessory Drive Adapter Disassembly Page 9-5

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Accessory Drive Adapter Disassembly Page 9-6

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2 inch 10 Pipe

Support the housing and press the bearing and shaft assembly in until it bottoms.

Caution: Press on the outer race of the bearing assembly.

~~ Position the gear with the lip down.

\:@7

1.25 inch Pipe Coupling

Support the bottom of the shaft with a 1.25 inch pipe coupling and press the gear on until it bottoms against the inner-bearing race.

Install the expanding plug in the barring tool hole.

Coat both sides of the inspection plate gasket with KW Copper Coat@.

13mm

Install the inspection plate.

Tighten to 24 Nem [18 ft-lbsJ.

Front Support - Clean and Inspect Use solvent. Clean the part.

Check the part for cracks or damage.

Front Support - aean and Oleck for Reuse Page 16-5