Recently, after having steering box replaced, we are experiencing a decided thre bumps when it kicks in. It did not do this before the replacement. I have started it from the outside box and it does not appear to be from the engine nor does the tray move. The front mounts appear to be good. My friends Onan makes these at kick point but not near as loud. Ideas?
George,
Do you have the Isuzu 3LD1 power unit on your generator?
Did they roll the generator out to replace the steering gear?
Pamela & Mike
Tighten the bolts thet hold the genset tray very tightly. All thumping goes away. The tech likely pulled the genset out to do the work.
Yes that is the gen set and I will retighten the bolts...thanks. I did not see movement on starting but I did not retighten either.
If tightening the tray bolts does not fix the thump, check the four rubber mounts which are between the generator frame and the drawer slide. Mine were disintegrated and causing metal/metal contact.
Thanks all...it appears the tightening worked but there is significant deterioration of the back mount and some contact can be heard. The thump was from the rear and I couldn't see movement of the tray.
George,
Check this thread for a source for the correct mounts:
LORD #283P-155 Powertech Generator Plate vibration mount (http://www.foreforums.com/index.php?topic=26133.msg208558#msg208558)
Thanks for the link!
Mounts
Isuzu Engine Mount (Green Dot) by Power Tech | Power Technology Southeast Inc (http://www.powertechgenerators.com/products/09mntgrn)
Thanks Mark...when you separated your gen set what was the gap measurement you used?
I mounted the lower frame under the radiator to the deck with additional mounts like the engine rests on. Only after that did I cut the frame connecting the radiator to the engine. That allowed all the spacing to stay the same as original.
Mark
I apologize for how I worded that Mark. How much needs to be cut away so the two ends don't come into contact?
George
Sorry. I just cut maybe 1/4 inch out or so. I could measure if you want.
Mark
Went out and looked and 1/4 to 3/8 looks good. Thanks for getting back to me. Located a lift and having at it next week. The mounts, tape, insulation, etc have all come in now. Your documenting of the process is so helpful. Been referring to it as the MAZ method.