The newer 4300D always had an oil film on the section pumps . I posted on Golftechs asking for the torque specs . to see if the bolts where in spec .
After remove the front bracing I had found the problem.Stud was snapped off flush with section valve .
Looks like it has been this way for a while . Apparently this happens fairly often .You may want to check your 4300 . Bolt kit was in stock at Veseys and where sent out next day.
First I drain the hydraulic oil tank . I keep a few empty pails sealed just for this reason . Would hate to loose or contaminate the oil before its due to be changed . I drained a good 35 liters out .
Mark the lines to section pumps . I let the inside wrench rest on the nut so it made hose removal easy . Remove all the lines .
Then use the Allan key and an wrench for better leverage to get the 2 bolts out that hold the section pumps to hydraulic pump .
Pump just pulls out there is an O ring on the end or in the pump .
Here is what it looks like with it removed .
Put the unit in the vice to hold for repair. The idea is not to move the sections out of place while the bolts and studs are out .
Picture with end cap removed . You can see the broken stud now and can be removed with vice grips .
Stud should come out fairly easy.
End cap. Keep everything clean when assembling .
I torqued the studs and bolts in two stages 15 ft.lbs. then 33
Ready for install.
Well almost . One of the bolts were longer ? The other one sits flush with bottom plate .
Trimmed it off with a cut off wheel . Then installed the new seal .
Pumps back in ready for lines to be hooked up I used a dab of sealer for hoses . I installed the front support bracket before hoses .
Done . Refill the hydraulic oil tank then start machine a let idle for 15 minutes . Check for leaks . Take your time and keep everything clean while doing this job . Over all fairly easy . Might have lost 100 ml of oil. 1 to 1.5 hours job.