WilliamsCreekFarm
New User
This message is a reply to an archived post by dg7766 on March 11, 2019 at 13:41:54.
The original subject was "f40 temp gauge".
While replacing the panel gauges on my 1955 TO-35 I have encountered similar problems with not being able to use a new sending unit that is part of the new temp. gauge assembly. The threads in the
housing for the thermostat are 5/8-18. The OEM sending unit is 1" long and all of the after market sending units are 1 1/2" long. The longer
sending unit will bottom out on the bolt that holds the thermostat cover onto the thermostat housing and makes it impossible to use the gauge and
sending unit without a bushing to space the sending unit and retainer out from the housing. The bushings provided by all after market units and the
units available from Massey Ferguson dealers are too large or are too large and are pipe thread. What is needed is a bushing that has both internal
and external 5/8-18 threads. I am fortunate to have the skill sets to make the required bushing. I had a piece of 1" brass hex stock from which I
cut a piece 1 1/4" long. I drilled a hole through at 5/16" diameter for clearance for the new sending unit. Next I drilled a hole in one end
approximately .450" deep using a 9/16" drill bit and tapped the hole 5/8-18 tpi.. A 27/64" drill will work but threads are 55% to 65%. Next I
turned the part around and turned an O.D. to .625" X .450" and threaded it 5/8-18. If you do this and have a clearance problem with the hex
interfering with the thermostat housing , you have room to turn a shoulder on the male end behind the end of the threads and towards the center of
the bushing which could be anywhere from .750" to .900" diameter which should give you clearance to tighten the bushing into the housing. I hope
this helps.
The original subject was "f40 temp gauge".
While replacing the panel gauges on my 1955 TO-35 I have encountered similar problems with not being able to use a new sending unit that is part of the new temp. gauge assembly. The threads in the
housing for the thermostat are 5/8-18. The OEM sending unit is 1" long and all of the after market sending units are 1 1/2" long. The longer
sending unit will bottom out on the bolt that holds the thermostat cover onto the thermostat housing and makes it impossible to use the gauge and
sending unit without a bushing to space the sending unit and retainer out from the housing. The bushings provided by all after market units and the
units available from Massey Ferguson dealers are too large or are too large and are pipe thread. What is needed is a bushing that has both internal
and external 5/8-18 threads. I am fortunate to have the skill sets to make the required bushing. I had a piece of 1" brass hex stock from which I
cut a piece 1 1/4" long. I drilled a hole through at 5/16" diameter for clearance for the new sending unit. Next I drilled a hole in one end
approximately .450" deep using a 9/16" drill bit and tapped the hole 5/8-18 tpi.. A 27/64" drill will work but threads are 55% to 65%. Next I
turned the part around and turned an O.D. to .625" X .450" and threaded it 5/8-18. If you do this and have a clearance problem with the hex
interfering with the thermostat housing , you have room to turn a shoulder on the male end behind the end of the threads and towards the center of
the bushing which could be anywhere from .750" to .900" diameter which should give you clearance to tighten the bushing into the housing. I hope
this helps.