rockymountain265
New member
Hello all, new to me 79 MF 265 with injection pump leak at the main body pump head seal. Trying to redo a few of the previous owners attempted fixes, i bought a rebuild kit and I&T manual (Big mistake) and went through it with no problems.
I got it back on the machine but the top cap gasket with the kit (paper material) appeared to be leaking a little (Anyone know where i can get a top gasket seal that is better then the paper one in the kits? Inspection window has a rubber one, would prefer one like that for the top cap.) In my efforts to resolve the top cap leak (where no leak was before) one of the top cap studs broke.
It is a double thread stud two different thread sizes, part # 7123-527. Everywhere i am finding the part i see a disclaimer that all vendors have switched to a metric version of this bolt and while they have had good success with 'just cranking it in' and it being a tight fit, I was hoping someone could point me in the right direction to a better solution besides salvage yards or making my own.
It is a 1/4-28 x 1/2" long bolt with a 10-32 stud ~ 1.5" tall that peaks out of the top cap. Most specialty fastener shops said it would be a special run but have minimum order quantities. I just need 2. I went as far as to check the local hardware stores for the bolts so I could weld them back to back but am having trouble finding the 10-32 locally. Online, I found them in a minimum of a 50 pack.
I am reluctant to take a tap to the pump housing, seems like overkill for these two simple studs.
I am reluctant to crank in a metric thread stud into standard thread housing for obvious reasons
I am contemplating drilling out the top cap holes and going with a 1/4-28 stud, but what about new top cover gaskets for where the studs come out of the cap? Can I make the ones in the rebuild kit work and seal properly by boring the center a little more on the gasket? Where could I source a 1/4"-28 replacement acorn nut gasket?
Suggestions on where to find a donor cav pump for this part?
Most of my local service facilities send the pumps off for repair so they are no help, which was in line with the suggestion by the I&T manual.
Clearly I can't be the only genius to do this to a dpa/cav injection pump? I even went as far as to call a few salvage yards. the techs who checked the yard said
All of the injection pumps were already pulled from the massey's. (Probably refurbished and resold long ago)
Recommendations for the correct replacement part are much appreciated.
I got it back on the machine but the top cap gasket with the kit (paper material) appeared to be leaking a little (Anyone know where i can get a top gasket seal that is better then the paper one in the kits? Inspection window has a rubber one, would prefer one like that for the top cap.) In my efforts to resolve the top cap leak (where no leak was before) one of the top cap studs broke.
It is a double thread stud two different thread sizes, part # 7123-527. Everywhere i am finding the part i see a disclaimer that all vendors have switched to a metric version of this bolt and while they have had good success with 'just cranking it in' and it being a tight fit, I was hoping someone could point me in the right direction to a better solution besides salvage yards or making my own.
It is a 1/4-28 x 1/2" long bolt with a 10-32 stud ~ 1.5" tall that peaks out of the top cap. Most specialty fastener shops said it would be a special run but have minimum order quantities. I just need 2. I went as far as to check the local hardware stores for the bolts so I could weld them back to back but am having trouble finding the 10-32 locally. Online, I found them in a minimum of a 50 pack.
I am reluctant to take a tap to the pump housing, seems like overkill for these two simple studs.
I am reluctant to crank in a metric thread stud into standard thread housing for obvious reasons
I am contemplating drilling out the top cap holes and going with a 1/4-28 stud, but what about new top cover gaskets for where the studs come out of the cap? Can I make the ones in the rebuild kit work and seal properly by boring the center a little more on the gasket? Where could I source a 1/4"-28 replacement acorn nut gasket?
Suggestions on where to find a donor cav pump for this part?
Most of my local service facilities send the pumps off for repair so they are no help, which was in line with the suggestion by the I&T manual.
Clearly I can't be the only genius to do this to a dpa/cav injection pump? I even went as far as to call a few salvage yards. the techs who checked the yard said
All of the injection pumps were already pulled from the massey's. (Probably refurbished and resold long ago)
Recommendations for the correct replacement part are much appreciated.