J&M GC-31T User Manual
MODEL GC31t-1 GRAIN CART ASSEMBLY
PATENTED SINGLE AUGER
GRAIN CARTS
J. & M. Mfg. Co., Inc.
P.O. Box 547 Ft. Recovery, OH 45846
Ph: (419) 375-2376 Fax: (419) 375-2708
www.jm-inc.com
READ MANUAL BEFORE BEGINNING ASSEMBLY
(Rev.5.16.13)
STEP - 1
GC31t-1 Grain Cart assembly
Through this assembly if the M10 x 25MM
serrated ange hex bolts are not long
enough in certain situations use the M10 x
35MM serrated ange hex bolts.
Tack Weld or Blue Sticker
For stability set the axle weldment up on blocks using an overhead hoist and chain. The blue sticker or
tack welds on the axle should face the front. For the axle and frame scale option installation instruc-
tions go to steps 3 & 4.
STEP - 2
M24 x 75 MM Bolt
M24 Lock Nut
Attach the main frame. Set the rear end onto the axle and the front end onto another block. Use (8) M24 x
75MM and (8) M24 nylon locking hex nuts to fasten main frame to the axle.
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STEP - 3
1”x 5” Bolt
GC31t-1 Grain Cart assembly
-Scale Option-
Left Scale Bar Mount
Weigh Bar (short side
to the inside)
1” Center Locking Nut
1”x 6” Bolt
Axle Weldment
1”x 5” Bolt
1” Center Locking Nut
Right Scale Bar Mount
Set the axle weldment up on blocks. Insert four digistar weigh bars. Use 1” x 6” bolts to attach weigh
bars to axle weldment. Make sure that the arrows on all of the weigh bars are pointing up. Attach
the scale bar mounts to the weigh bars using 1” x 5” bolts. Be sure to use correct scale bar mounts in
correct positions. Use (8) 1” center locking nuts on the bolts.
STEP - 4
M24 x 75 MM Bolt
-Scale Option-
M24 Lock Nut
Set the main frame onto the scale axle using an overhead hoist. Use a drift pin to line up the holes then
attach using (12) M24 x 75 MM hex cap screw bolts and (12) M24 nylon locking hex nuts. Make sure
scale wires are not in a position where they will be cut or smashed.
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STEP - 5
M24 Washer
M24 Lock Nut
GC31t-1 Grain Cart assembly
M24 x 75 MM Bolt
Place the front leg onto the main frame using an overhead hoist. Use a drift pin to help line up the holes.
Attach the front leg with (8) M24 x 75MM hex head bolts, M24 washers, and M24 nylon locking nuts.
Note: Do not completely tighten. The legs will need to be able to slide for adjustment in a later step.
STEP - 6
M24 x 75 MM Bolt
M24 Lock Nut
Place the rear leg onto the main frame using an overhead hoist. Use a drift pin to help line up the holes.
Attach the rear leg with (12) M24 x 75MM hex head bolts and (12) M24 nylon locking nuts.
The plate from the main frame then gets squared with the plate from the rear leg. Tighten bolts.
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STEP - 7
GC31t-1 Grain Cart assembly
3 Slots
Attach the front rail. Use (8) M10 serrated ange bolts and (8) M10 serrated ange hex head nuts to
attach the front rail to the front leg.
STEP - 8
2 Slots
Attach the rear rail. Use (8) M10 serrated ange bolts and (8) M10 serrated ange hex head nuts
to attach the rear rail to the rear leg.
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STEP - 9
GC31t-1 Grain Cart assembly
Attach opposite auger side rail (OAS). Use (4) M10 serrated ange nuts and (4) M10 serrated ange
hex head nuts to attach the OAS to the front and rear rail.
STEP - 10
Attach Auger Side (AS) Rail. Use (4) M10 serrated ange nuts and (4) M10 serrated ange hex
head nuts to attach the AS rail to the front and rear rails.
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STEP - 11
GC31t-1 Grain Cart assembly
Measure-
Measure from corner to corner on the rails. Reposition the front leg to get the measurements to be
within 1/8” - 1-4” (3mm-6mm) of each other. Once completed, tighten all bolts to ensure that the
structure remains square. (Do not tighten bolts on the front leg.)
STEP - 12
Attach front rail cross brace. Use (29) M10 serrated ange hex head bolts and (29) M10 serrated hex
ange nuts.
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STEP - 13
GC31t-1 Grain Cart assembly
Attach rear rail cross brace. Use (21) M10 serrated ange hex head bolts and (21) M10 serrated hex
ange nuts. Do NOT insert bolts into holes that are surrounded by squares in the gure above.
STEP - 14
Attach the two AS Slope Gussets and two OAS Slope Gussets using (12) 8.8 M10 x 25 MM serrated
ange hex head bolt and M10 serrated ange hex head nuts.
!STOP! It is important to have all bolts and nuts tightened at this point. In the next steps, it will become
hard to access some of the bolts.
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STEP - 15
GC31t-1 Grain Cart assembly
Attach the front lower panel to the front leg as shown. Use (2) temporary M10 serrated ange bolts to
hold the front lower panel in place. Insert bolts into the two holes that are circled.
STEP - 16
Attach the rear bottom panel to the rear leg as shown. Use (2) temporary M10 serrated ange bolts to hold
the rear bottom panel into place.
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STEP - 17
GC31t-1 Grain Cart assembly
Attach the OAS lower middle panel. Use (5) 8.8 M10 x 25 MM serrated ange hex head bolts and (5)
M10 serrated ange hex head nuts to attach the OAS lower middle panel. Only insert hardware into
the holes that are inside the outlined area in the gure above.
STEP - 18
Attach the AS lower middle panel. Remove the 2 temporary bolts and use (10) 8.8 M10 x 25 MM ser-
rated ange hex head bolts and (10)M10 serrated ange hex head nuts to attach the AS lower middle
panel. Only insert hardware into the holes that are inside the outlined area in the gure above.
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STEP - 19
GC31t-1 Grain Cart assembly
Attach the front AS lower middle panel. Use (6) 8.8 M10 x 25 MM serrated ange hex head bolts and (6)
M10 serrated ange hex head nuts. Only insert hardware into the holes that are inside the outlined
area in the gure above. For the scale option leave out hardware that is inside of the circle.
STEP - 20
Attach the front OAS lower middle panel. Remove the two temporary bolts and use (11) 8.8 M10 x 25
MM serrated ange hex head bolts and (11)M10 serrated ange hex head nuts. Only insert hardware
into the holes that are inside the outlined area in the gure above.
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STEP - 21
GC31t-1 Grain Cart assembly
Attach the OAS bottom panel. Use (1) 8.8 M10 x 25 MM serrated ange hex head bolts and (1)M10
serrated ange hex head nuts to attach the OAS bottom panel. Insert the hardware into the hole that is
highlighted in the outlined area in the above gure.
STEP - 22
Attach the OAS bottom panel. Use (1) 8.8 M10 x 25 MM serrated ange hex head bolt and (1)
M10 serrated ange hex head nut to attach the OAS bottom panel. Insert the hardware into the
hole that is highlighted in the outlined area in the gure above. If the front bottom panels have
any sag in them, move your front legs forward. Once nished tighten the front leg.
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STEP - 23
Attach the Front and Rear Tank Reinforcements. Use (26) M10 x 25 MM
serrated ange hex head bolts and (26)
M10 serrated ange hex head nuts to
attach the Front and Rear Tank Reinforcements.
highlighted in the outlined area.
DO NOt insert bolts that are
GC31t-1 Grain Cart assembly
STEP - 24
Attach the Bottom Panel Corners. Use (12) 8.8 M10 x 25 MM serrated ange hex head bolts and (12)
M10 serrated ange hex head nuts to install the Bottom Panel Corners.
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STEP - 25
GC31t-1 Grain Cart assembly
Attach the Wheel Well Corners. Use (4) 8.8 M10 x 25 MM serrated ange hex head bolts and (4) M10
serrated ange hex head nuts.
gure above.
STEP - 26
Attach the AS and OAS
Wheel Wells. For the OAS
Wheel Well use (16) 8.8 M10
x 25 MM serrated ange
hex head bolts and (16)M10
serrated ange hex head nuts
for installation.
hardware into the outlined
area. For the AS Wheel Well
use (17) 8.8 M10 x 25 MM
serrated ange hex head bolts
and (17)M10 serrated ange
hex head nuts for installation.
DO NOt insert
DO NOt insert hardware into the holes that are inside of the outlines in the
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STEP - 27
GC31t-1 Grain Cart assembly
Attach the OAS Front Lower Middle Panel. Use (24) 8.8 M10 x 25 MM serrated ange hex head bolts
and (24) M10 serrated ange hex head nuts for installation. DO NOt insert hardware into the holes that
are inside of the outlined area in the gure above.
STEP - 28
Attach the AS Front Lower Middle Panel. Use (23) 8.8 M10 x 25 MM serrated ange hex head
bolts and (23) M10 serrated ange hex head nuts for installation. DO NOt insert hardware into
the holes that are inside of the outlined area in the gure above.
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STEP - 29
GC31t-1 Grain Cart assembly
Attach the Rear AS Lower Middle Panel. Use (17) 8.8 M10 x 25 MM serrated ange hex head bolts and
(17) M10 serrated ange hex head nuts for installation.
the gure above.
STEP - 30
DO NOt insert hardware into the outlined area in
Attach the Rear OAS Lower Middle Panel. Use (17) 8.8 M10 x 25 MM serrated ange hex head
bolts and (17) M10 serrated ange hex head nuts for installation. DO NOt insert hardware into the
outlined area in the gure above.
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STEP - 31
GC31t-1 Grain Cart assembly
Attach the Front AS Upper Middle Panel. Use (18) 8.8 M10 x 25 MM serrated ange hex head bolts and
(18) M10 serrated ange hex head nuts for installation.
the gure above.
STEP - 32
Attach the Front OAS Upper Middle Panel.
Use (18) 8.8 M10 x 25 MM serrated ange
hex head bolts and (18) M10 serrated ange
hex head nuts for installation. DO NOt insert
hardware into the outlined area in the gure
above.
DO NOt insert hardware into the outlined area in
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