634-2553 634-2554 engine camshaft CAT spare part

Advantages

• Maintains valve timing across the engine speed range.
• Promotes effective fuel combustion and exhaust regulation.
• Supports variable valve timing mechanisms.

1. Dedicated phase for right front bank, synchronized with other three camshafts for balanced power
2. Mirror ground cam surface, low friction, reduce pitting and spalling under high temperature
3. Strict journal coaxiality, uniform bearing load and low seizure risk
4. Single shaft replacement, no full bank disassembly required, save service time

FAQ 

Q1：Can 634-2553 replace 634-2555 right rear camshaft?
A：No. Lobe layout, timing phase and locating structure differ, front and rear are not interchangeable.
Q2：Must other camshafts be replaced together with 634-2553?
A：Not mandatory. Inspect other camshafts separately and replace if worn severely.
Q3：What to check first if right front bank fuel consumption rises?
A：Check timing phase, valve clearance, stuck tappets and cam bearing clearance first.
Q4：How to protect cam lobes during long storage?
A：Clean surface, apply anti-rust oil, wrap with anti-rust paper, support on journals instead of lobes.