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? Dimensional Checklist

The document provides a dimensional checklist for the Caterpillar 3408 engine, detailing various measurements and tolerances for components such as cylinder bore diameter, piston skirt diameter, and crankshaft journal diameter. Each measurement includes expected dimensions and status indicators (OK/Not OK). Additionally, it mentions the creation of visual diagrams to illustrate the specified measurement points.

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abdullah
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40 views2 pages

? Dimensional Checklist

The document provides a dimensional checklist for the Caterpillar 3408 engine, detailing various measurements and tolerances for components such as cylinder bore diameter, piston skirt diameter, and crankshaft journal diameter. Each measurement includes expected dimensions and status indicators (OK/Not OK). Additionally, it mentions the creation of visual diagrams to illustrate the specified measurement points.

Uploaded by

abdullah
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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📏 Dimensional Checklist – CAT 3408 Engine

🧰 General Information:

 Engine Model: Caterpillar 3408

 Engine Type: V8, Four-stroke Diesel

 Application: Industrial / Marine / Heavy Equipment

✅ Dimensional Points Checklist

Expected Status
No Measurement Measure
Component Dimension / (OK/Not
. Point d Value
Tolerance OK)

Cylinder Bore Inside bore (each 137.16 mm


1
Diameter cylinder) (±0.127 mm)

90° to piston pin,


Piston Skirt 136.70 mm
2 15 mm from
Diameter (±0.05 mm)
bottom

Cylinder Liner Top of liner above 0.102 - 0.305


3
Protrusion block surface mm

Connecting Rod Crankshaft – rod 88.90 mm


4
Journal Dia. journal (±0.03 mm)

Main Journal Crankshaft – main 111.13 mm


5
Diameter journals (±0.03 mm)

Width of intake and


Valve Seat
6 exhaust valve 1.5 – 2.0 mm
Width
seats

Valve Stem Measured 10 mm 11.10 mm


7
Diameter above tip (±0.02 mm)

Camshaft
60.32 mm
8 Journal Bearing journals
(±0.05 mm)
Diameter

9 End Play – Axial movement of 0.076 – 0.381


Expected Status
No Measurement Measure
Component Dimension / (OK/Not
. Point d Value
Tolerance OK)

Crankshaft crankshaft mm

Connecting Rod Between rod and 0.20 – 0.45


10
Side Clearance crankshaft cheek mm

Compression From center of pin


11 76.20 mm
Height – Piston to top of piston

From crankshaft
12 Deck Height centerline to deck ~258.3 mm
surface

Visual Diagrams with Dimension Points

I will now generate labeled diagrams with arrows pointing to each of the
above dimensions:

1. Top View of Cylinder Block – For Cylinder Bore, Deck Height, and
Liner Protrusion

2. Piston Diagram – For Piston Skirt Diameter and Compression Height

3. Crankshaft Diagram – For Journal Diameters and Side Clearance

4. Valve & Cylinder Head Diagram – For Valve Stem, Seat Width

5. Camshaft Diagram – For Journal Diameter

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