How to mount a generator on a Cub
The generator head is a
, it produces 5000 watts continuous.
The generator pulley is a variable pitch sheave #3X438 from
The drive belt is a B30 available from NAPA
2 - pieces 7/8" solid rod 24" long.
2 - pieces 7/8" solid rod 28" long.
2 - pieces 1" i.d. pipe 7" long.
2 - pieces 1" i.d. pipe 11" long.
2 - pieces 1" i.d. pipe 2" long.
2 - pieces 2" x 2" angle iron 18" long.
1 - piece 1/4" plate steel 7" x 12"
10 - 3/8" nuts
10 - 3/8" x 1" bolts
The dimensions given are nominal, and may vary depending on mounting location.
determine where you can attach the two pieces of pipe that will hold the generator
frame to the tractor.
Find a place that will not be in the way of any other implements you may use!
The arrows point to the two pieces of pipe.
Next, fabricate the two pieces of 1" I.D. pipe, cut them to 7 inches long,
drill two 3/8" holes on one side of each pipe about 1" from each end and weld a 5/16" nut over each hole.
Screw a 5/16" x 1" bolt into the nuts.
Cut two pieces of 7/8" dia. solid rod 26" long, slide them into the pipe until the ends are even and tighten the bolts
to clamp the rods.
Using the solid rods to check for parallel and level, weld the two pieces of pipe to the angle iron on the tractor.
Loosen the bolts in the pipes and remove the rods.
Weld each of the rods to the inside corner of a piece of 2" x 18" angle iron so the overall length is 28".
Make the assembly for the generator mount using the 1/4" x 7" x 12" steel plate and the two 11" long 1" i.d.
pipes, as shown in this detail.
Put the rods back into the pipes on the tractor with the angle irons flat on top and pointing towards
Slide the two 24" solid rod pieces through the pipes in the generator mount assembly and place on top
of the angle irons, refer to
Tack weld the solid rods that the generator slides side to side on in place, and make sure the unit will
slide in and out of the pipes welded to the tractor without any binding.
Finish welding up the assembly, make two adjustable stops from the 2" long pieces of pipe and slide them
over the ends that go into the tractor.
Mount the generator head and line up the pulleys, set the adjustable stops so that when the frame is pushed in the
pulleys will be aligned.
The PTO on a cub runs at the same speed as the engine.
The generator head needs to turn at 3600 RPM.
For initial setup, set the engine to about 1600 RPM
(you may need more RPM if you are going to be putting a heavy load on the generator)
and adjust the adjustable sheave to give the proper generator speed.
Your governor must be working properly to maintain voltage under load change (such as a well pump starting).
When I get ready to use the generator I use a volt meter and adjust engine RPM so that output is
slightly over 110 volts with no load.
Recheck voltage with the average intended load on the generator and adjust engine speed for 110-115 volts.
If hooking up to your house be sure to install a