133-4081 camshaft for CAT engine spare part

133-4081 camshaft for CAT engine spare part Featured Image
  • 133-4081 camshaft for CAT engine spare part

Short Description:

Right front camshaft for Caterpillar 3516 / 3516B V-engine, for mechanical unit injector engine, drives valve and unit injector tappets, controls valve and injection timing for right front cylinder bank, overhaul replacement for mining trucks, large wheel loaders and stationary generator sets.

Product Detail

Product Tags

description

This camshaft is dedicated right front unit among four camshafts of 3516. It differs from 127-8262 left front camshaft with unique lift and phase profile, non-interchangeable. Cam lobes actuate both valve tappets and unit injector tappets to coordinate valve events and injection timing for mechanical injection 3516 heavy-duty engine.

It is forged carbon steel with high-frequency hardened cam surfaces and filleted tooth root for fatigue resistance under cyclic mining shock loads. Through internal oil gallery feeds journals and cam lobes continuously to reduce scoring and spalling risk at high operating temperature.

It is forged carbon steel with high-frequency hardened cam surfaces and filleted tooth root for fatigue resistance under cyclic mining shock loads. Through internal oil gallery feeds journals and cam lobes continuously to reduce scoring and spalling risk at high operating temperature.

Part Number: 133-4081
Name: Right front camshaft
Applicable Models: Caterpillar 3516, 3516B engine; 793C/793D mining truck, 994D/994F loader, generator set
Height (in): 9.0
Length (in): 51.0
Material: Carbon steel, hardened cam surface
Type: New part, drive gear not included
Function: Drive valve and unit injector tappets, control valve and injection timing for right front cylinder bank

Product Advantages

1. Carbon steel base with hardened cam lobes, impact and fatigue resistant for continuous heavy-duty operation of 3516 large displacement engine
2. Dedicated right-front cam profile with OEM injection and valve lift setting for balanced air exchange and injection of right front cylinders
3. Through internal oil gallery provides steady lubrication and suppresses wear under prolonged high load
4. Pre-delivery runout and phase inspection, tight coaxiality control, stable timing and less power deviation after installation

FAQ 

Q: What faults are caused by pitting and spalling on cam lobes?
A: Reduced injection lift, delayed injection, power loss on right front bank, rough idle and black smoke, multi-cylinder misfire in severe cases.

Q: Can 133-4081 interchange with 127-8262 left front camshaft?
A: No. Left front and right front camshaft have different lift and phase profile, interchange will cause injection and valve timing failure.

Q: What happens if oil passage is blocked?
A: Cam journals and lobes lose lubrication and score rapidly, leading to premature camshaft failure and stuck tappets.

Q: What risk if I reuse old cam bearings?
A: Worn out-of-round bearings create uneven clearance and score the new camshaft journals quickly.

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