Mack Air Start - Question?

Righto you fellas, who knows about Mack air starters?
The one on my R600 works fine- but all of a sudden, it's "changed it's tune" so to speak..
Now, instead of just sounding like a "mack air start", it sounds like someone has used one of those tyre "bead blaster" thingos. You can still hear the whine, sortof, but it's drowned out by the "air blast".
Got me beat! Looks normal, seems to work normal, (only get about three goes at it before it's out of air) but literally sounds like you've opened the big air valve on your compressor. If you stand beside the engine when you start it, it nearly deafens you...
So the question is, is there some sort of baffle that could have blown off / worn out etc? The "vent" on the bottom that I presume is the baffle looks normal?
I notice that the diesel lube line doesnt seem to be squirting as much as I'd expect, it's pretty dry round there, so I gave it a good drink of air tool oil, but that made no difference, only a mess!
Any good suggestions? Is it something? Or is it nothing?
Cheers!
Richard

ProDivr
Gudday M8

on the air start on the exhaust sum have a spring loaded flap n others have a muffler ( like a small dog food tin wiff slits init)
May B yours fell off

Sumtimes things like this need to get worse ............ B 4 they get bettr

LOL
cya

Reckon it should have a muffler or road splash deflector screwed into the air outlet of the starter.

Edit: Whoa, 28 seconds apart!

If it's a 150BMP size starter the spring loaded thingy might be part number 10BM-A735 (well it was in a 1970 listing)

Geez Jim ...
You branching out to 'other' brands now

Maybe because you weren't in it on the weekend

FWIW
Boff of our KWhopperz came wiff factory fitted Ingersol Rand air starts
n we run ol batteries th@ aint suitable 2 B used in cars

cya

werk, I've had a few blokes up the road in the past telling me to "change my brand" ......

...maybe Jimbo likes other types of truckS TOO......

What ?? ... Old pommy Traders ...

ProD
M80

The