DT-429 Service manual? in IH Engines Posted October 14, 2020 Good afternoon, I'm planning to change out a head gasket and crankshaft seal on my DT-429 in the next few days and am curious if anyone one here has a service manual for this engine? I purchased one off ebay a few weeks ago but it shows no sign of arriving any time soon... I'm mainly concerned with whether or not I can re-use the head bolts, and what their torque specs are (as well as pattern, however this is not critical). Any information regarding this engine would be welcomed. I realize this thing probanly belongs in a museum given the lack of parts available, however it's worth a shot for me to service it myself and hopefully get someore hours out of it! Thank you.