Scott:
I believe such a device has been developed and it was offered here 11 =
days
back. Is this not what you're trying to reinvent?? Here it is again =
below.
Paul Bartz
From: Horst H. Becker [mailto:horstb]
Sent: Saturday, August 14, 1999 4:11 PM
Subject: Electrical Circuits Available
I recently took early retirement and finally got a chance to use the =
GMC for
more than a few outings. As might be expected not all went well all the =
time
although we sure enjoy this
unit.=20
Part of the refurbishing I was not able to get some replacement parts =
so I
designed my own in addition to some new ones. Attached are descriptions =
of
these circuits and if the need ever arises then give me a
call.=20
=20
203 N. Clark Dr.
Palatine, IL 60067
Tel. (847) 776-6708
FAX (847) 776-6709
email horstb
MKM Electronics, Inc.
Horst H. Becker gggggggggggggggggggggggggggggggggggggggggg
HB8 - 1 Front Bearing Temperature Monitor
Description:=20
This monitor will alternately display the temperature of the driver &
passenger side wheel hub/ball bearing (approximately every 35 to 45
seconds). An LED will indicate which side is being reported. A red LED =
will
light if the measured temperature exceeds 200 degree F. The viewing =
module
is about 3 =BD" x 2 =BD".
The temperature measurement is an approximate measurement of the =
front
bearings, and is a highly repeatable measurement. The temperature =
sensor is
located about 1/2" from the bearing race separated by a metal paste, =
which
further removes the measuring sensor. Thus it means that the actual
temperature of the bearing is somewhat higher.
After about 10 min. of sustained steady driving speed each temperature =
unit
will show a repeatable temperature reading (though they may differ,
especially if one wheel is in direct sun shine). If this reading =
steadily
increases based on similar driving conditions then something is =
happening
with the bearings. A close inspection should follow as soon as =
possible. It
is possible that during repeated heavy braking, such as mountain =
driving;
the temperature of the bearing will increase. At this time it is not =
certain
to what extent that will be visible. If it is substantial, based on =
feedback
from users, then this sensor can be used to monitor the brake =
temperature
also. (Simultaneous) The sensors can actually be mounted on the brake
caliper instead of the hub, thus reporting brake temperature.
NOTE: THIS IS NOT A REPLACEMENT FOR ROUTINE MAINTENANCE OF THE BEARINGS =
OR
BRAKES!!!!!
Installation:
The sensors are mounted directly to the hub, close to the bearing =
by
drilling a 3/16" hole about 1/4" deep. This can be done from the top =
without
removing the wheel by raising the coach about six in. for easy access. =
The
wires are routed along the control arms into the coach behind the fuse =
panel
for passenger side sensor, and by the steering column for the driver =
side
sensor.=20
Inside the GMC, there are two locations for suggested mounting, using
adhesive strips. First, a location between the two big circles - =
speedometer
& other. The second location is right next to the battery booster =
switch &
the steering column.
From: Scott Shean [mailto:shean]
Sent: Wednesday, August 25, 1999 1:02 AM
Subject: RE: GMC: Temp gauge for bearing temp or other uses
Roger, I wonder if one of our GMCNet electrical engineers could design =
an
alarm system that uses this low cost technology? We have a great deal =
of
interest in our front bearing temps, but only when they are out of =
line.
Additionally, we have little room for additional gages.
From: owner-gmcmotorhome On Behalf Of Roger Black
Sent: Tuesday, August 24, 1999 3:51 PM
Subject: GMC: Temp gauge for bearing temp or other uses
Following is a quote to Specialty Sales (me) from a supplier. Any =
interest?
Temp sender is not what I was looking for, but gauge AND sender for 20
bucks. Will just take a bigger glob of J-B Weld to attach it to the =
bearing
housings.
"In the VDO line, which is all we handle, we have a 400f temp gage and
sender that you can buy from stock pn 310 091 is the kit that includes =
the
gage and sender in Cockpit style. The sender has 1/8 npt threads and =
is
brass. List is $39.00 and your cost would be 1/2 off plus we pay the
shipping on shipments of $300 or more."
Would need the great volume of 8 sets to qualify for the free shipping. =
Way
I figure it: $39.00 Two VDO gauges with temp senders=20
3.20 Priority mail - think this is what it is now
1.00 To
GMCMotorhome.com donation for site upkeep
$43.20 Total per set of two gauges
Any body interested, email me direct at rblack and we'll =
play
it by ear from here.
wner-gmcmotorhome]On Behalf Of Roger Black
