420-9998 camshaft for CAT engine spare part

420-9998 camshaft for CAT engine spare part Featured Image
  • 420-9998 camshaft for CAT engine spare part
  • 420-9998 camshaft for CAT engine spare part
  • 420-9998 camshaft for CAT engine spare part

Short Description:

Right bank camshaft for Caterpillar C32 engine, dedicated for C32 V-type heavy-duty engine, drives valve tappet assembly and controls intake and exhaust valve timing for right cylinder bank, overhaul replacement for large mining trucks, mining bulldozers and generator sets.

Product Detail

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description

This camshaft is exclusive for the right cylinder bank of Caterpillar C32 V-engine. It is not interchangeable with C27 camshafts. Cam lobes actuate tappets and rocker assemblies to precisely control valve lift and timing window, matching C32 electronic fuel system for stable combustion under heavy load. C32 uses separate left and right bank camshafts with unique timing profiles, they cannot be swapped.

It is forged carbon steel with high-frequency hardened cam surfaces for excellent fatigue and pitting resistance under continuous mining shock loads. Internal through oil gallery connects to main oil passage to feed journals and cam lobes continuously, reducing scoring and spalling risk at high temperature.

It fits Caterpillar C32 engine, widely used on 797F mining trucks, D11T/D11R bulldozers, large stationary generator sets and mining power packs. Timing gear is sold separately, verify engine serial number before ordering.

Part Number: 420-9998
Name: Right bank camshaft
Applicable Models: Caterpillar C32 engine; 797F mining truck, D11T/D11R bulldozer, large generator set
Material: Steel
Outer diameter: 85 mm (3.34 in)
Length: 1184 mm (46.61 in)
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 operation of C32 large displacement engine
2. Dedicated right-bank cam profile with OEM valve lift and timing setting for balanced air exchange and stable power output
3. Through internal oil gallery provides steady lubrication and suppresses wear under prolonged high load
4. Strict runout and coaxiality inspection before delivery, easy calibration and low timing drift after installation

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 420-9998 replace the left bank camshaft of C32?
A: No. C32 left bank camshaft has different timing and lift profile, interchange will cause valve timing failure and risk of valve-piston contact.

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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