From: Patrick Jankowiak (recycler@swbell.net)
Date: Tue Feb 14 2006 - 20:13:11 PST
I see the choices for doing the generator thing in the TMs:
Power Takeoffs (Models WN-7-28, WND-7-28, and P-136-C)
-------------------------------
WN-7-28, WND-7-28 fit the (SAE) standard, six-bolt hole power takeoff opening.
National stock number . 252040-7061137
Ordnance number . . . . 7061137
Manufacturer . . . . . Spicer Div. - Dana Corp.
Model . . . . . . . . . WN-7-28
Type . . . . . . . . . .Heavy-duty
Speeds . . . . . . . . .2 forward, 1 reverse
Drive . . . . . . . . . Transmission
Input gear . . . . . . .Helical
Output shaft . . . . . . 1¼ in. dia; 5/16 in.keyway
Gear pitch . . . . . . 7/9 in.
Horsepower delivered:
100 rpm . . . . . . . . 2.7
500 rpm . . . . . . . 13
1000 rpm . . . . . . . 27
National stock number . . 2520-00-706-1136
Ordnance number . . . . . 7061136
Manufacturer . . . . . . .Spicer Div. - Dana Corp.
Model . . . . . . . . . . WND-7-28
Type . . . . . . . . . . .Heavy-duty
Speeds . . . . . . . . . .2 forward, 1 reverse
Drive . . . . . . . . . . Transmission
Input gear . . . . . . . .Helical
Output shaft (front) . . .1¼ in. dia, 5/16 in. keyway
Output shaft (rear) . . . 7/8 in. dia, 5/16 in. keyway
Horsepower delivered:
100 rpm . . . . . . . . . 2.7
500 rpm . . . . . . . . . 13
1000 rpm . . . . . . . . .27
Gear pitch . . . . . . . .7/9 in.
-------------------------------
P-136-C fits the transfer case.
"(3) Power takeoff model P-136-C (fig. 1-11) is a
single drive, one-speed unit designed to mount only on
transfers. The outer carriers are circular in shape and
serve as a support for the main drive shaft and
driveshaft bearings. This unit is used to drive various
types of auxiliary vehicle equipment."
National stock number . . 2520-00-229-5673
Ordnance number . . . . . 11609228
Model . . . . . . . . . . P-136-C
Speeds: One (variable with engine rpm and transmission gear)
Drive . . . . . . . . . . Transfer
Output shaft . . . . . . .Tapered 1½ in. to 1 in.
Horsepower delivered . . . . . . . Same as engine HP
so, for 540RPM, could use engine speed and gear:
third gear = 874RPM
second gear = 1501RPM
I think third would be OK? second would be one noisy and wasteful bugger.
It also requires an oil line. definitely for the heavy stuff!
--------------------------------
It looks like I need to find the speed output
ranges of the WND-7-28, and compare to the P-136-C.
I think it is easier to mount something like the
WND-7-28 to the tranny that the transfer, and I don't
really relish the thought of having to be so sure
about end play in the input shaft of the transfer after
installing the PTO there. I have no way to check
it and don't want to remove the monstrous transfer
case! Page 34 of TM 9-2520-246-34P shows this
PTO mounting rather well.
So, here is a good question, I don't find it readily yet in the manuals,
What is the speed of the WND-7-28 PTO in relation to the engine speed?
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