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Grade 2 Grade 5 Grade 8
1/4-20 NC 70 in. lbs. 115 in. lbs. 165 in. lbs.
1/4-28 NF 85 in. lbs. 140 in. lbs. 200 in. lbs.
5/16-18 NC 150 in. lbs. 250 in. lbs. 350 in. lbs.
5/16-24 NF 165 in. lbs. 270 in. lbs. 30 ft. lbs.
3/8-16 NC 260 in. lbs. 35 ft. lbs. 50 ft. lbs.
3/8-24 NF 300 in. lbs. 40 ft. lbs. 60 ft. lbs.
7/16-14 NC 35 ft. lbs. 55 ft. lbs. 80 ft. lbs.
7/16-20 NF 45 ft. lbs. 75 ft. lbs. 105 ft. lbs.
1/2-13 NC 50 ft. lbs. 80 ft. lbs. 115 ft. lbs.
1/2-20 NF 70 ft. lbs. 105 ft. lbs. 165 ft. lbs.
9/16-12 NC 75 ft. lbs. 125 ft. lbs. 175 ft. lbs.
9/16-18 NF 100 ft. lbs. 165 ft. lbs. 230 ft. lbs.
5/8-11 NC 110 ft. lbs. 180 ft. lbs. 260 ft. lbs.
5/8-18 NF 140 ft. lbs. 230 ft. lbs. 330 ft. lbs.
3/4-10 NC 150 ft. lbs. 245 ft. lbs. 350 ft. lbs.
3/4-16 NF 200 ft. lbs. 325 ft. lbs. 470 ft. lbs.
Note - See tractor instruction manual or your tractor dealer for tightening of metric bolts.
TORQUE VALUES
Common bolts and nuts Tightening Torque Plus/Minus 20%
30
POWER BEYOND KITS
FOR TRACTORS WITH OPEN-CENTER HYDRAULIC SYSTEMS
General Description
A power beyond application is required to convert a
hydraulic valve so that pressurized oil can be directed
to another “open center” valve. This allows the back-
hoe valve and a loader valve, or other accessory, to
be connected to the tractor hydraulic system simulta-
neously, without the inconvenience of using a flow
diverting valve.
Since the power beyond application is only required
on “open center” hydraulic systems, oil will be con-
stantly flowing from the pump through the backhoe
and loader or other accessory valve, and then back to
the reservoir. “Open center” refers to this constant
flow through the open center of the valves.
The assembly instructions cover two conditions that
require a power beyond kit to be ordered from Bush
Hog. The first procedure shows the recommended
method of connecting a Bush Hog loader with a Bush
Hog valve to a Bush Hog backhoe. The second pro-
cedure shows the recommended method for connect-
ing a Bush Hog backhoe and a competitive loader or
a non Bush Hog valve. The second is also used to
operate the backhoe and loader off the backhoe PTO
pump kit option. The power beyond plug is included
with the loader valve when the valve is ordered. The
second procedure requires the power beyond kit for
Backhoe Preparation
1. Remove shroud covering valve hydraulic fittings.
Note: The terms RIGHT and LEFT for all adapter
parts are determined from the position of the operator
when seated in the operating position on the backhoe.
2. Carefully clean the top and right side of the back-
hoe control valve and remove the “conversion” plug
located in the center of the right side of the valve.
Note: If there are two plugs in this area, the conver-
sion plug is the larger plug located lower on the right
side of the valve.
the backhoe valve be ordered from Bush Hog as a
separate item.
The hoses and fittings required in either procedure to
connect the two valves together are not supplied. The
proper fittings and hose lengths required must be
determined for each specific application. The parts
must be supplied by the customer.
Tractor Preparation
Stop tractor, lower all attachments to the ground, and
relieve pressure in all hydraulic lines by moving all
control handles back and forth or side to side several
times.