Compressors..

[tsm1@domain.elided (Tom Mandera)]

Well, made some progress (over 4 hours!) last night..

I got ONE hose over the DISCHARGE side, but the SUCTION end of the York is
giving me trouble.. almost got it all the way on.  I'm going to try buying a
very long 3/8" bolt, and pushing it into the air hose, almost all the way to
the York Hose-"barb" fitting.. then give it a few whacks with a hammer (the
nail will give me a good spot to hit, and keep the hammer blows from
dissipating into flexing the air line) to get it on far 'nuff for a good seal.

I put my big "T" mess along the fender, with the 3-1 manifold coming up in
between the heater and the washer fluid.

Towards the front of the truck, off a pipe-down and a T, is the neck-up/down
with the check valve.  I put one pipe-clamp around the "leg" (between the
3-1 and the T) and bolted it almost right on the "corner" of the inner fender.

Short hose comes out of the discharge, and comes to a 90-deg elbow (all I
had left with a female/female) and takes a turn to another hose that runs
down and around to the inlet of the check valve (actually goes farther
forward than the back edge of the compressor before it mates to the valve)

I broke the hose up, because I plan to install the air/water filter right
after the discharge, and before the check valve (not the best air-location),
with a bracket off the compressor housing to hold it over the "back" side of
the compressor.

I haven't wired things up yet, but I worked on my Pressure Switch mount.

I bought some corner angles at the hardware store, and ended up cutting
probably 3/4" off one edge.  I then slipped it up as an flipped "L", with
one edge under the cowl lip, and the other side hanging out away from the
firewall.  One bolt through the pressure switch and into the corner angle
holds the switch in place with the bracket.  I then drilled a 1/4" hole
(widened it) through an existing cowl screw to the passenger side of the
hood release, and ran it through a new hole in the angle bracket, making for
a secure connection.  

The air in-put for the switch is facing the passenger side of the engine bay.

However, I had left the instructions for the pressure switch in the house,
and it was already 11:30..

So I put an extra quick-connect coupling on the switch end (which is a
flexible air line from the firewall side of my "T") to cap it for the time
being.

Fired up the truck, and ran my jumper cable around to give some juice to the
clutch...

Whirrr whirrr whirrr.. watchin' that pressure gauge when.. BANG!  Sounded
like a good firecracker.. I wasn't quick enough to let go of the clutch
wire, when the Pop-off valve "POPPED".. quite loud!  I thought I'd burst a
hose somewhere at first, but no sign.

I then hooked up my coil hose and "blowgun", and held the blowgun open, then
energized the clutch again.. just to sit there and hear/feel air coming out
of my air compressor was kinda fun.. stuck around 40psi while I was doing
it, too..

I still haven't checked the oil, per Howard's instructions.

Do I need to worry about REMOVING the oil that's in there, and how should I
do that?  (remove the compressor and pull the "check plug" on the bottom
side?  I don't think I want to do that right now!), or use some type of
"dropper bulb" to "siphon" out the existing oil, and re-fill with straight
30w Non-detergent...

Or, do I just put (if it needs it) some 30w non-detergent in and call it good?

John Landry (and others):

I got the wiring diagram for the switch in front of me.. and I know I want
to hook up a manual "override" switch.. 

I'm assuming I want to place the switch on the "energize" circuit, to keep
from even allowing the switch to close the "compressor clutch" circuit.. 

Or, is there any benefit to doing it the other way, on the "compressor
clutch" side.. I wonder if the switch will ever stick "shut" and keep the
compressor on.. or.. ?

Hm.. I think I'll just do it the easy way and wire it to the "energize" side.

BTW, what's my best choice for the hot-lead from the ignition?  I have the
extra tab on the fuse panel for ACC/RUN things, but I haven't picked which
item I want to get juice from for the RUN items.. like the compressor.  I
plan on just running the hot lead from the fuse panel (if that's a good
choice) right up to a rocker switch under the dash, and then out to the
pressure switch just next to the hood release.

I don't see any amperage figures on the SquareD info card to tell me what
type of fuse I need for the "energize" side of the switch..

Or, for that matter, what do I need to energize the clutch?  I'll run that
straight off the batter, through the switch, and around to the clutch.. but
what type of fuse should I use?

Amost There!

I should finish it up tonight.. and maybe get that hand throttle in there
while I'm at it.. (and wire the CB up to the fuse panel instead of the
lighter...)

-Tom Mandera, Helena MT
http://www.tmcom.com/!~tsm1/scout
'72 and '77 Scout IIs