1HD-T Vacuum

[Adam B]

I have a hand throttle already - standard equipment on the HDJ81. What I mean by an idle up switch is an actual electrical switch that bumps up the idle. In this case, a switch that can independently control the AC idle up vsv. It would look similar to this:
http://www.ebay.com/itm/Toyota-Rav-...arts_Vehicles_CarParts_SM&hash=item33830f2443

The problem with this is that if you turn on your AC your idle speed will go up to whatever you have it set to (I'm assuming you will have it set around 1200rpm for warmup?) and the truck tries to drive away on you. I use my AC all through the year to defog faster so it would be a no-go for me.

 

[finderscuba]

The problem with this is that if you turn on your AC your idle speed will go up to whatever you have it set to (I'm assuming you will have it set around 1200rpm for warmup?) and the truck tries to drive away on you. I use my AC all through the year to defog faster so it would be a no-go for me.

I have a 5 speed.

 

[Adam B]

And apparently I can't read.

So yeah, just hook up any switch you want between an IG+ source and a second idle-up VSV. If you just tap into the wire at the AC VSV you'll be engaging the AC clutch when you want to idle-up.

 

[finderscuba]

If you just tap into the wire at the AC VSV you'll be engaging the AC clutch when you want to idle-up.

That would actually be a good thing. The more load on the engine at -40°C temperatures, the better. Otherwise I can literally watch the temperature needle drop while idling. I typically load up the alternator by turning on lots of accessories. Sometimes I will shift the transfer to N, put the tranny in 5th and bump up the idle to 1200 to load the engine and also warm up the gearbox. With cardboard in front of the rad also, I can just about keep the temperature up while stuck in traffic.

 

[Malahki]

Bumping an old thread as their does not seem to be much info out there on these vacuum pumps. Does anybody's FSM show how to tear down / rebuild them?? Specs?? My manual shows nothing

Also for anybody else looking I have added a pic with all the parts required
(Edit: blades come individually packaged, you will need 5)

 

[Malahki]

Little update for anyone thats interested. Its a real simple to rebuild these pumps. Just remove the three bolts from the back cover if you just want to inspect or replace blades or O-ring. Only need to remove gear if you plan to change the bearing. Its pressed onto the shaft and into the housing. The only thing tricky is making sure rotating assembly and blades are in the proper position when putting the cover back on or the blades could be damaged

 

[bumpstopbrawler26]

What kind of vacuum do you see now that you've repaired your pump? I have a 1kz and I see 25" of vaccuum, on a very similar pump that you have.

 

[Malahki]

What kind of vacuum do you see now that you've repaired your pump? I have a 1kz and I see 25" of vaccuum, on a very similar pump that you have.

I dont know yet. This was just one small piece of a very extensive engine overhaul. I will try to remember to reply once the engine is installed and running