421-0087 camshaft for CAT engine spare part

421-0087 camshaft for CAT engine spare part Featured Image
  • 421-0087 camshaft for CAT engine spare part

Short Description:

Right bank camshaft for Caterpillar C27 engine, interchangeable with reman part 20R-1895, drives valve tappet assembly and controls valve timing for right cylinder bank, overhaul replacement for D10T bulldozers and 773F/775F mining trucks.

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description

This camshaft is dedicated to the right cylinder bank of Caterpillar C27 V-engine. Cam lobes actuate tappets and rocker assemblies to regulate valve opening and closing events, matching C27 electronic fuel system for stable combustion under heavy mining loads. It has different timing and lift profile from left bank 421-0071 and cannot be swapped.

It is forged carbon steel with high-frequency hardened cam surfaces for excellent wear and fatigue resistance against cyclic mining shock loads. Internal through oil gallery feeds journals and cam lobes continuously to reduce scoring and spalling at high operating temperature.

It fits Caterpillar C27 engine, widely used on D10T/D10N/D10T2 bulldozers, 773F/775F/773G/775G mining trucks, 844H/844K and 990H/990K wheel loaders. Timing gear is sold separately, verify engine serial number before ordering.

Part Number: 421-0087
Interchange No.: 20R-1895, 301-7455
Name: Right bank camshaft
Applicable Models: Caterpillar C27 engine; D10T/D10N/D10T2 bulldozer, 773F/775F/773G/775G mining truck, 844H/844K, 990H/990K loader
Height (in): 4.0
Length (in): 52.0
Material: Carbon steel, hardened cam surface
Type: New part, timing gear not included
Function: Drive valve tappet assembly and control intake & exhaust valve timing for right cylinder bank

Product Advantages

1. Carbon steel base with hardened cam lobes, impact and fatigue resistant for continuous heavy-duty mining operation of C27
2. Dedicated right-bank cam profile with OEM valve lift and timing setting for balanced air exchange of right-side cylinders
3. Through internal oil gallery provides stable lubrication and suppresses wear under high load
4. Direct interchange with reman part 20R-1895, flexible sourcing and shorter machine downtime

FAQ 

Q: What faults are caused by pitting and spalling on cam lobes?
A: Insufficient valve lift, poor gas exchange, power loss on right bank, rough idle and valve train noise, engine derate in severe cases.

Q: Can 421-0087 replace 421-0071 left bank camshaft?
A: No. 421-0071 is left-bank camshaft with different timing and lift profile, interchange will cause 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 only replacing camshaft without changing bearings?
A: Worn out-of-round bearings create abnormal clearance and score the new camshaft journals quickly.

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