Anyone using a Prochem 405?? Need VACUUM GAUGE readings to check against mine

Johnny,
that sounds about right for factory settings.

The 4'' reading. Is that with one port blocked or both open? Clean tank filters?

With one port blocked and the machine on high, mine read just over 1.

On the 405, no hose, one port blocked and at high speed, the reading should be 5-7 hg. ( if it is higher then you have blockage in the vac tude or at the vac filter in the waste tank ). Under full load at high speed ( both ports blocked ) it should be at 14 hg. ( if it is lower, you have a leak and it may be the waste tank lid gasket or the short hose connecting the machine to the waste tank ). Make sure the gauge is on "0" before you start. If it is not on "0" when it is off, that number is now "0" and count from there. Make sure that the vac gauge line is sealed onto the vac relief elbow that is connected to the blower. Too much vac will cause more heat, too little vac will cause heat loss.
PC Truck Mount Repair

It should be 12 hg

In the manual "Performer & Performer 405" page 5, the vacuum relief valve setting is 13hg. The "Performer" setting is 14hg. I would set the 405 to 14hg. But thanks for the correction.

Please read page 45! 1st paragraph!

http://prochem.com/Upload/KCProduct...fafc15a6_67-945324_Performer Performer405.pdf

page 9 pdf file. page 5 in manual 13 hg perfoormer 405

pg 49 pdf is page 45 of manual?? maybe its page 51 of manual yep 13 hg again what manual do you have Ara???? it does say 14 for performer and 13 for 405. nothing on page page 45 about 12.

ps this pdf from prochem is the same manual I got with my machine new. in 2002

I scanned this from my book. Here's what I'm thinking. I have a 4LL blower. I know they changed the blower from 4LL to 4LP. Perhaps the 4LP is 13Hg.

I see thank you that makes since. I wonder what the difference is between 4lp and 4ll what year is yours mine is a 2002.

still looks like a 4ll blower maybe its engine size?

Mine is a 1994 model. It was installed the same day oj simpson was chased down the freeway.haha
If you have a 4LL then yours should be 12Hg. I would get to the bottom of that. Did you buy yours brand new? Has nothing to do with engine size.

Pretty sure 4LL Sutorbilt has two shafts. 4LP has one shaft and 3" ports.

No, the 4LL has one shaft.

There should be two nuts on the long bolt they need to be separated 1st. Then you adjust the nut closest to the blower by tightening or loosening it up depending if you want more hg's or less. You can hold the bolt with pliers also.

My relief is set a 15 with a glide it usually never locks down that high to where it opens. depends on the carpet. generates a little more heat that way. 9 year old machine close to 9000 hours.

You have to put vise grips high on the threaded part so it won't turn with the nut.