SCALE-TEC 7600413 REVA User manual

7600413 REVA
GRAIN CART RETROFIT
DEMCO SWIVEL HITCH
SCALE SYSTEM
Instructions

TABLE OF CONTENTS
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Anamosa, Iowa USA
TABLE OF CONTENTS
INTRODUCTION............................................................................................................................................. 3
Charging Battery and Welding .................................................................................................................. 3
SCALE BRACKET AND LOAD CELL MOUNTING INSTALLATION...................................................................... 4
Scale Installation ....................................................................................................................................... 4
JUNCTION BOX MOUNTING.......................................................................................................................... 8
Four Hole Junction Box ............................................................................................................................. 8
INDICATOR MOUNTING ................................................................................................................................ 9
RAM MOUNT............................................................................................................................................. 9
TESTING AND TROUBLE SHOOTING............................................................................................................ 10
Inaccurate weights? ................................................................................................................................10
Erratic weights?.......................................................................................................................................10

INTRODUCTION
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INTRODUCTION
Congratulations on the purchase of your new Scale-Tec Grain Cart scale system. This scale system is
specifically designed to weigh the hopper on your Grain Cart. This scale kit is specifically designed for
your make and model of Grain Cart. These instructions will guide you through general installation of the
kit. The scale kit can be used to record and monitor seed weight going into or out of the grain cart.
This SAFETY ALERT SYMBOL indicates important safety messages in the manual. When you see
this symbol, be alert to the possibility of PERSONAL INJURY and carefully read the message that follows.
NEVER OPERATE WITHOUT ALL COVERS, SHIELDS AND GUARDS IN PLACE.
KEEPHANDS, FEET AND CLOTHING AWAY FROM MOVING PARTS. FAILURE TO HEED MAY RESULT
INSERIOUS PERSONAL INJURY OR DEATH.
Some covers and guards have been removed for illustrative/photographic purposes only in this manual.
For information on ordering repair parts, refer to Parts Section in this book.
This supersedes all previous published instructions.
IMPORTANT!
Charging Battery and Welding
Disconnect all cables from the weighing indicator before charging the battery or welding on the
machine. If cables are left connected, the weighing indicator and connected load cells could be
damaged.
Important: Do not weld near indicator, load cells or cables; remove from area to be welded. Place
ground close to area to be welded to prevent current from passing through electronic parts.

Scale Installation
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SCALE BRACKET AND LOAD CELL MOUNTING INSTALLATION
Scale Installation
The scale kit consists of mounting two spindle load cells, one hitch load cell, one J-box and a scale
indicator to support the grain cart.
1. Jack up one side of the cart utilizing a jack or lifting device that will support the full weight of the
grain cart.
SAFETY!!! Ensure you properly block the Grain Cart to provide support in the event of a jack
failure or lifting device failure. Only install one side at a time. Lifting both sides simultaneously may be
too unstable and result in serious injury or death.
2. Remove the Wheel and Hub Assembly
Fig. 1
Refer to Fig. 1
To remove the hub….
i. Remove the Hub Cap.
ii. Remove the Hub Gasket (if
installed).
iii. Remove the Cotter Key / Role
Pin.
iv. Remove the Castle Nut.
v. Remove the Outer Washer.
vi. Remove the Hub.
vii. Remove the Inner Washer.
viii. Remove the Hub seal.
Refer to Fig. 2
i. Remove the spindle retaining bolt
and slide the spindle out.
IMPORTANT! It may be necessary
to utilize a large pipe wrench, penetrating
oil, or a slam hammer to remove rusted in
axles. As a last resort, heat the sleeves
with a torch to remove spindles.
Fig. 2
Fig. 2

Scale Installation
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3. Install the Spindle Load Cells.
Fig. 3
Fig. 4
4. Reinstall the wheel and tighten wheel lugs.
5. Repeat steps one through three for installation of the other side.
Refer to Fig. 3
i. Install the load cell into the spindle
bushing and then into the spindle
sleeve on the grain cart frame. It is
necessary to route the cable through
the sleeve prior to installing the load
cell into the sleeve.
ii. Install the existing hardware retaining
bolt to secure the load cell into place.
IMPORTANT! Ensure the sticker with
the serial number and part number is located
on the top. Failure to do so will result in
inaccurate weights.
Refer to Fig. 4
Install the hub assembly…
i. Install the hub seal on the load
cell.
ii. Install the inner bearing.
iii. Install the hub
iv. Install the outer bearing
v. Install the retaining washer
vi. Install the Castle nut.
vii. Install the Cotter Key/ Roll Pin
viii. Install the Hub gasket
ix. Install the Hub.
IMPORTANT –Grease the bearings
during installation if needed.
NOTE: Spindle bushing only
applies to kits with 3 ¾”
spindles.

Scale Installation
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Refer to Fig. 5
i. Unbolt the swivel retaining collar and remove the collar from the swivel shaft.
ii. Remove the swivel shaft.
iii. Unbolt and remove the pintle receiver from the vertical adjustment hitch.
IMPORTANT!! For Digi-Star load cells arrow sticker must be pointed up. For Weigh-Tronix weigh Bars “TOP”
sticker must be positioned to the top.
5. Remove existing hitch and Install hitch load cell.
Fig. 5

Scale Installation
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Refer to Fig. 6
i. Insert the load cell into the sleeve of the grain
cart.
IMPORTANT!! For Digi-Star load cells arrow
sticker must be pointed up. For Weigh-Tronix
weigh Bars “TOP” sticker must be positioned to
the top.
ii. Install the swivel collar onto the load cell and
retain it with the existing hardware.
iii. Install the vertical adjustment hitch onto the
load cell.
iv. Install the pintle receiver onto the vertical
adjustment.
6. Install hitch load cell.
7. Route cabling and mount the Junction Box. See Junction Box mounting section for detailed
instructions.
Fig. 6

Junction Box Mounting
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JUNCTION BOX MOUNTING
Four Hole Junction Box
The junction box is water resistant, not water-proof. It should be mounted to avoid submersion during
wetweather and to avoid physical abuse. The junction box can be mounted on the frame of the grain
cart. All load cell cables must reach the J-Box. Install by removing the double sided tapebacking and
apply to cleaned surface.
Connect Load Cell and Indicator “J-Box” Cable
1. Route front and rear load cell cables to J-box location.
Make sure they are not bound or pinched. Cable tie
(customer provided) load cell cables in place.
2. Insert load cell and J-box cables through each of the
water-tight strain-reliefs.
3. Remove each terminal block from the J-box.
4. Connect wires of the same color to the same terminal
block as shown above. See instructions below.
5. Install terminal block into the J-box as shown (location
not important).
6. Tighten nuts on the water-tight strain-reliefs.
7. Assure that gasket is properly installed in the cover.
8. Attach cover using 4 screws (provided).
Installing Wires into Terminal Block
1. Open levers 90º to locked position.
2. Insert individual wires into terminal.
3. Close lever.
4. Tug wire to assure solid connection.

Indicator Mounting
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INDICATOR MOUNTING
RAM MOUNT
The scale indicator can be mounted in the tractor cab or on the grain cart with various mounting
options. This particular instruction shows mounting with a “ram” type mount.Your particular kit may
only come with a fixed mounting plate. Contact Scale-Tec for other mounting options for your need.
1. Bolt the readout directly to the ram mount utilizing the indicator mounting screws provided.
2. Install power cord to a 12-volt negative ground battery.
3. Route J-box cable to indicator and install to indicator bottom panel.
Power Connection:
The power cable should be connected directly to a vehicle battery or regulated power supply. The scale
end of the power cable is attached to the J901 connector located on the bottom panel of the indicator.
Connect the RED wire from the power cable to +12 VDC and the BLACK wire to GROUND. The indicator is
fused internally at 4 amps.
Power Cable Connections:
Wire Color
Wire Function
Red
Battery (+12 VDC)
Black
GROUND
Load Cell Connection:
The indicator is designed to operate with strain gage load cells. The indicator will normally be supplied
with a “J-BOX” cable going between the scale and the load cell junction box.
Load Cell Wire
Digi-Star
Function
1
Red
+EX
2
Green
-SIG
3
White
+SIG
4
Black
-EX
5
Clear
SHIELD

Testing and Troubleshooting
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TESTING AND TROUBLE SHOOTING
IMPROTANT All bars need to weigh accurately before it will be beneficial to recalibrate your
indicator
Inaccurate weights?
1) Measure the same person, or a 200 pound bag of seed, on each of the weigh bars.
If one weighs negative, turn that weigh bar over. (An upside down bar will weigh negative.)
If one side is weighing 20% light, check for an obstruction. Is anything binding or any metal
rubbing?
Could be a faulty weigh bar
If they are all even weights, but are weighing light or heavy, you need to adjust the calibration.
If your scale is more than 5% off, call us for help, as your scale may have had the wrong
calibration number put in it from the factory. 1-888-962-2344.
The hopper being weighed needs to be at least ¾ full for us to adjust calibration.
Check operator’s manual or give us a call at 1-888-962-2344.
Erratic weights?
The following process needs to occur in an effort to eliminate one part at a time in an effort to find the
problem! When you reconnect the faulty part you will have erratic readings again.
1) Disconnect the junction box cord from the indicator marked “load cells”. The indicator should
stabilize after 45 seconds. Try to zero out the indicator. IF the indicator won’t zero out, the indicator is
the problem.
IF it will zero out:
2) Connect the junction box back to the indicator. And then disconnect all of the load cells from the
junction box.
3) Zero out the indicator. IF the indicator won’t zero out the problem is the junction box or the junction
box cable.
IF it will zero out:
4) Reconnect the load cells ONE AT A TIME, zeroing out the indicator each time. When you reconnect
the faulty load cell, you will have erratic readings again.