FWD
Senior Member
I bought this 503A grader this winter. It has a UD-236IH diesel. It started poorly and didn't run very well once it did start. Found out that the injectors were installed improperly. The glow plug was below the injector line instead of above as I found out on another site that plug needs to be above. When I took the injectors out, I found 4 of the 6 leaking, so I put 6 rebuilt in and new glow plugs too. Now it starts and runs great. Hope to do some grading on small private roads in the summer.
FWD
FWD