100-7408 camshaft for CAT engine spare part

100-7408 camshaft for CAT engine spare part Featured Image
  • 100-7408 camshaft for CAT engine spare part
  • 100-7408 camshaft for CAT engine spare part

Short Description:

Camshaft with gear for Caterpillar 3406A/3406B/3406C engine, drives valve train, controls intake and exhaust valve timing, replacement for mechanical fuel pump engine overhaul.

Product Detail

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description

This camshaft is a core valve-train component for older mechanical pump 3406 series diesel engines. It comes assembled with a 64-tooth timing drive gear. Cam lobes actuate tappets and rocker arms to precisely control valve lift and timing. It is widely fitted on loaders, scrapers, large excavators and generator sets.

It is forged from steel with hardened cam surfaces for good impact resistance and pitting resistance, suitable for long continuous heavy-duty operation. Journals and cam profiles are machined to OEM drawings with stable timing reference, making it a common overhaul part for 3406A/B/C.

This is a complete assembly with timing gear, different from bare shaft 0R-3787. No separate gear installation is required during assembly. It must be matched with correct camshaft bushings to maintain concentricity and reduce premature wear.

Part Number: 100-7408
Name: Engine camshaft with timing gear
Applicable Models: Caterpillar 3406A, 3406B, 3406C engine
Interchange Part No.: 7W-3797, 20R-7546, 333-0428
Height (in): 8.5
Length (in): 47.5
Material: Forged steel, cam surface induction hardened
Type: New complete assembly
Function: Drive valve train and control valve timing

Product Advantages

1. Forged steel base with hardened cam lobes, wear and impact resistant for 3406 mechanical pump heavy-duty engines
2. Pre-assembled 64-tooth timing gear for stable timing reference and less assembly error
3. Accurate cam lift and timing profile to maintain stable power and fuel consumption
4. Supplied as a complete assembly, reducing separate part sourcing and overhaul downtime

FAQ 

Q: What faults are caused by worn camshaft gear teeth?
A: Timing drift, incorrect valve sequence, power loss and high fuel consumption. Severe case leads to valve-piston contact.

Q: Can 100-7408 replace bare shaft 0R-3787 directly?
A: Yes, cam profiles are identical. Note that 0R-3787 requires separate gear fitting and gear tooth count check.

Q: Can this camshaft fit 3406C electronic fuel injection engines?
A: Not suitable. Electronic injection versions use different cam profile and timing parameters, interchange is forbidden.

Q: What causes stiff rotation after camshaft fitting?
A: Misaligned pressed bushings, offset oil holes or tight gear backlash. Do not force crank rotation; inspect one by one.

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