Busted Zerk Fitting On Mower Deck

[hotajax 270]

So I have a 48 inch deck to fit on my 314-8,  The zerk for the center pulley ( i. e. the big pulley that drives 2 belts ) has a broken zerk.  Center of the zerk that fits into the grease gun snapped off, and I have a big open hole the piece that's still threaded into the pulley.  Do you gents know the thread sizes for the zerk that goes into the pulley?  I'm sure it's a common size, but I don't know what it is.  Thanks.  

[ri702bill 12,102]

Most likely 1/4-28 fine thread - maybe 1/8 NPT.

You can try using an Easy-out to extract the broken piece.

[Chaz54 99]

Should be a 1/4-28 thread.

[Lee1977 7,637]

The lift arm hits that zerk.  Some of the later model Wheel Horse had a hole drill in the lift rod for a waher and clip pin to keep it away,

[Ed Kennell 46,072]

I always replace that zerk with a set screw after greasing.

[WHX?? 56,594]

I'll go with the 1/4 -28 crowd and a 5/16 wrench if there is anything left to bite on. If not a easy out and it should come out fairly easy with the grease being there. They are usually not that tight. 

[pfrederi 20,533]

[WHX?? 56,594]

That's a handy one Paul. 

[hotajax 270]

14 hours ago, Lee1977 said:

The lift arm hits that zerk.  Some of the later model Wheel Horse had a hole drill in the lift rod for a waher and clip pin to keep it away,

I'm not that guy that's lucky enough to have the improved configuration.  

[hotajax 270]

On 3/13/2026 at 5:13 PM, Chaz54 said:

Should be a 1/4-28 thread.

Chaz:  I yanked out one of the good zerks, and the one that came out was that size, but it looked tapered.  It's only 1/4 " of thread that goes into the top of the pulley.  Not much to hold it.  Is that correct - tapered? Thanks.

[WHX?? 56,594]

Yes they do look tapered. There is a long and a short style. The short style there isn't much for threads.