Stumpy Check this out.
atvguns asked about a Stumpbroke oiler for the clams.
MS 029 Super------Stock Pump Suction Hose ID 0.150" Stock Pump Inlet Hole ID 0.077" Stock Pump Outlet Hole ID 0.077"
Stock Plastic Snap In Fitting From Pump Discharge 0.086" Stock Plastic Case Snap On ID 0.086"
Stock Hole In Case For Bar Feed 0.095"
I knocked out roll pin and removed oil adjuster (it has a offset dowel on the end) and drilled the welch plug end with a .077" drill bit and screwed in a sheet rock screw. Keep turning turning in the screw and it will push out pump and bronze bushing. I drilled out pump suction and discharge to #44 drill (0.086") to match snap in and case. On the end where I screwed in sheet rock screw - drill out with #7 (0.201") 0.180” deep (
Do Not Go Any Deeper Or You Run Into End Of Pump Slot) this is the tap drill for 1/4-20 threads and tap hole. I put a 1/4-20 x 1/4 long allen head set screw so I can adjust the pump head clearance to give more oil flow. The stock clearance at max output was 0.040" - this allowed a lot of oil to
Bypass inside housing. Caution the pump shaft strokes in and out as you roll it. With the set screw I can set the head clearance to 0.005"-0.010" for max flow 28" bar or turn down stock adjuster for 20" bar.
I tried to file the pump shaft cup section out today and the file would only shine the shaft (has to be above Rockwell 50). I used my cone tip grinding stone to increase the cup depth by 0.020" to increase oil output per revolution.