How many labor hours does it usually take to replace wear liners on a Caterpillar 777C?

[Spencer Cawoddy]

Hey guys, trying to plan out a job on a Caterpillar 777C and looking for some real-world input. We've got a set of pre-cut wear liners ready to weld in, so the job should mostly be removing the old liners and installing the new ones.

Just trying to get a rough idea:

• How many labor hours does this usually take?
• Is it typically a one-day job or longer, depending on the condition?
• Any tips to speed things up or things that usually slow it down?

I know it probably depends on how worn or stuck the old liners are, but just looking for ballpark estimates from anyone who's done it before.

 

[Daylan Goughman]

If the old liners come out cleanly, it goes much faster. I'd also check for cracks or thin spots while everything's exposed so you don't have to tear it apart again later.