UC4+™ & UC5™ Spray Height Control

NORAC's Spray Height Control system requires very little maintenance, but there are a few procedures that will ensure your system continues to work correctly for many years.

Before each day:

• Grease the sprayer friction pads to ensure the boom is pivoting separately from the sprayer. This is very important for Active Roll™ systems. It may be necessary to grease the friction pads multiple times throughout each day.
• Inspect the foam insert in each sensor. If it is clogged with dust or other debris, clean it. If necessary replace the foam.

At the end of the season:

• Replace the oil filter in the NORAC hydraulic manifold (PT/ 104827) annually.

Single Animal Scale

NORAC weighing products are now manufactured and distributed by Rice Lake Weighing Systems.  For information on weighing products, please visit www.ricelake.com/norac.

The most common type of problem that can occur is when the load on the scale is not supported completely by the load bar pads. On a regular basis check around and under the weigh apparatus to see if any debris has collected near the scale. Any ice, dirt, mud or manure that builds up around the weigh apparatus can cause inaccurate readings. The scale should be kept clean to ensure proper operation.

It should also be noted that an excess of debris on top of the scale could also cause problems. Depending on the type of scale you have, there may be a limited range of weight you can "zero" off the scale. Always keep the build up of material on top of the scale to a minimum. Lubrication of the bearings in your scale is also important. The bearings are located in the bearing collar, as shown in the parts list diagram. Inject grease into the bearings using a needle at least once every two years. Use good high-pressure grease to lubricate the bearings completely. Do not use an excess of grease - it should lubricate the bearing without bleeding around the foam seal.

Portable Group Animal Scale

NORAC weighing products are now manufactured and distributed by Rice Lake Weighing Systems.  For information on weighing products, please visit www.ricelake.com/norac.

Weekly

1. Check entire scale for buildup of debris. Remove any debris found on, under or around the scale.
2. Check for dirt and debris in the load cell stands and clean accordingly.
3. Check all external cables and conduit for damage.

Yearly (in addition to weekly and monthly maintenance)

1. Disassemble each load cell location and grease all pins and eyebolts.
2. Check indicator level switch (NORAC Weigh Center only).

Cleaning Load Cell Stands
It is very important to keep any excess debris from building up in the load cell stand. Lift scale and block it up, clean any dirt out of the load cell stands through the drain holes located at the bottom of the stand.

Checking Level Switch
(NORAC Weigh Center Only)
Place the system on a slope greater than four degrees (example - a steep approach). Alternately jack up one side of the base frame so that the scale is off level by more than four degrees. Turn on the indicator and check the display. If the indicator does not display "OFF LEVEL" you may have a faulty PCB. Consult your local scale dealer. This test should be performed in all four directions, front low, rear low, right side low and left side low.

Disassembly and Greasing
This is very important to ensure the long life of your unit.
Use the parts list drawings for item numbers.
Note: Use quality high-pressure grease.
Note: Avoid bending or twisting the load cell wires.

1. Remove the cell stand cover (27).
2. Remove the plug covers (34)
3. Remove the bolt which holds together items 26, 39, 38.
4. While holding the cam handle (36), remove the outer cam (38).
5. Remove the load cell pin (37) and spacers (35). The load cell assembly will be free on top and rest against the inside of the cell stand.
6. Remove the inner cam (26).
7. Remove the lower retainer (33)
8. Grease all bearing surfaces except where the eyebolt contacts the pin (upper and lower pins, cams, upper and lower eyebolts).

Reassemble in reverse order as described above.

Load Cell Wiring

Reassemble in reverse order as described above.

Mobile Group Animal Scale

NORAC weighing products are now manufactured and distributed by Rice Lake Weighing Systems.  For information on weighing products, please visit www.ricelake.com/norac.

First Week

1. Check torque on all wheel nuts.

Weekly

1. Axle Pivot Locations.
2. Check entire scale for build-up of debris. Remove any debris found on, under or around the scale. Rubber Tbelting at both ends of the scale are removable to make clean out easier. To remove T-belting, unhook the stretch cord that hooks into the corner tube of the cage.
3. Check for dirt and debris in the load cell stands and clean accordingly.
4. Check all external cables and conduit for damage.

First Month (in addition to weekly maintenance)

1. Check torque on all wheel nuts.
2. Adjust trailer brakes.

Monthly (in addition to weekly maintenance)

1. Charge trailer battery if necessary.
2. Tire Pressure. 45 psi./40psi. - Single /Tandem Axle

Yearly (in addition to weekly and monthly maintenance)

1. Check and grease wheel bearings.
2. Disassemble each load cell location and grease all pinsand eyebolts.
3. Adjust trailer brakes.
4. Check indicator level switch.

Scale Maintenance Procedures

Cleaning Load Cell Stands
It is very important to keep any excess debris from building up in the load cell stand. Lift scale and block it up, clean any dirt out of the load cell stands through the drain holes located at the bottom of the stand.

Checking Level Switch
Place the system on a slope greater than four degrees (example - a steep approach). Alternately jack up one side of the base frame so that the scale is off level by more than four degrees. Turn on the indicator and check the display. If the indicator does not display "OFF LEVEL" you may have a faulty PCB. Consult your local scale dealer. This test should be performed in all four directions, front low, rear low, right side low and left side low.

Disassembly and Greasing
This is very important to ensure the long life of your unit.
Use the parts list drawings for item numbers.
Note: Use quality high-pressure grease.
Note: Avoid bending or twisting the load cell wires.

1. Remove the cell stand cover (27).
2. Remove the plug covers (34)
3. Remove the bolt which holds together items 26, 39, 38.
4. While holding the cam handle (36), remove the outer cam (38).
5. Remove the load cell pin (37) and spacers (35). The load cell assembly will be free on top and rest against the inside of the cell stand.
6. Remove the inner cam (26).
7. Remove the lower retainer (33)
8. Grease all bearing surfaces except where the eyebolt contacts the pin (upper and lower pins, cams, upper and lower eyebolts).

Reassemble in reverse order as described above.

Trailer Maintenance Procedures

How to Use Your Electric Brakes Properly
Your trailer brakes are designed to work in synchronization with your tow vehicle brakes. Never use your tow vehicle or trailer brakes alone to stop the combined load.

Your brake controller must be set up according to the manufacturer's recommendations to ensure proper synchronization between the tow vehicle and the trailer. Additionally, you may have to make small adjustments occasionally to accommodate changing loads and driving conditions.

Proper synchronization of tow vehicle to trailer braking can only be accomplished by road testing. Brake lockup, grabbiness, or harshness is quite often due to the lack of synchronization between the tow vehicle and the trailer being towed, too high of a threshold voltage (over 2 volts), or under adjusted brakes.

The following should only be performed in a safe environment such as an unpopulated road free of traffic or under controlled conditions.

Before any synchronization adjustments are made, your trailer brakes should be burnished-in by applying the brakes 20-30 times with approximately a 20 m.p.h. decrease in speed, e.g. 40 m.p.h. to 20 m.p.h. Allow ample time for brakes to cool between application. This allows the brake shoes and magnets too slightly "wear-in" to the drum surfaces.

Synchronizing Your Trailer Brakes
To ensure safe brake performance and synchronization, read the brake controller manufacturer's instructions completely before attempting any synchronization procedure.

Make several hard stops from 20 M.P.H. on a dry paved road free of sand and gravel. If the trailer brakes lock and slide, decrease the gain setting on the controller. If they do not slide, slightly increase the gain setting. Adjust the controller just to the point of impending brake lockup and wheel skid.

Note: Not all trailer brakes are capable of wheel lockup. Loading conditions, brake type, wheel and tire size can all affect whether a brake can lock. It is not generally considered desirable to lock up the brakes and slide the tires. This can cause unwanted flat spotting of the tires and could also result in a loss of control.

If the controller is applying the trailer brakes before the tow vehicle brakes, then the controller adjustments should be made so the trailer brakes come on in synchronization with the tow vehicle brakes. For proper braking performance, it is recommended that the controller be adjusted to allow the trailer brakes to come on just slightly ahead of the tow vehicle brakes. When proper synchronization is achieved there will be no sensation of the trailer "jerking" or "pushing" the tow vehicle during braking.

Brake Adjustment
Brakes should be adjusted (1) after the first 200 miles (first month) of operation when the brake shoes and drums have "seated," (2) at 3,000 mile intervals (or yearly), (3) or as use and performance requires. The brakes should be adjusted in the following manner:

1. Jack or block the axle arm to allow free rotation of the wheel.
2. Remove the adjusting hole cover from the adjusting slot on the bottom of the brake backing plate.
3. With a screwdriver or standard adjusting tool, rotate the star wheel of the adjuster assembly to expand the brake shoes. Adjust the brake shoes out until the pressure of the linings against the drum makes the wheel very difficult to turn.
4. Then rotate the star wheel in the opposite direction until the wheel turns freely with a slight lining drag.
5. Replace the adjusting hole cover and lower the wheel to the ground.
6. Repeat the above procedure on all brakes. For best results the brakes should all be set at the same clearance.

Wheel Assembly and Torque Specification

1. Start all bolts or nuts by hand to prevent cross threading.
2. Tighten bolts or nuts in the sequence shown below.
3. The tightening of the fasteners should be done in stages. Following the recommended sequence, tighten fasteners per torque chart below.
4. Wheel nuts/bolts should be torqued before first road use and after each wheel removal. Check and re-torque after the first 10 miles, 25 miles, and again at 50 miles.

Bearing Adjustment
In the event the hub is removed follow this procedure for wheel bearing adjustment.

1. After placing the hub, bearings, washers, and spindle nut on the axle spindle rotate the hub assembly slowly while tightening the spindle nut to approximately 50 lbs.-ft.
2. Then loosen the spindle nut to remove the torque. Do not rotate the hub.
3. Finger tighten the spindle nut until just snug.
4. Back the spindle nut out slightly until the first castellation lines up with the cotter key hole and insert the cotter pin.
5. Bend over the cotter pin legs to secure the nut.
6. The nut should be free to move with the only restraint being the cotter pin.
7. Install the dust cover and rotate the wheel to ensure the cotter key does not contact the dust cover.

OnBoard™ Low Profile

NORAC weighing products are now manufactured and distributed by Rice Lake Weighing Systems.  For information on weighing products, please visit www.ricelake.com/norac.

Weekly

1. Check entire scale for build up of debris. If any debris is found under the scale frame or around the pockets remove it immediately.
2. Check to ensure Pocket Covers and Load Cell Mount covers are in place and in good condition.
3. Visually check all external cables and conduit for damage.
4. Raise and lower the scale to ensure the up/down alarm is working properly.
5. Lift scale and block it up, clean any dirt out of the pockets through the drain holes. It is very important to keep any excess of debris from building up in the load cell pocket. The drain holes are located on the bottom of the scale frame tube underneath the load cells.
6. If you find any larger material inside the pocket remove it from the top. You can use a shop vac to clean out the pockets from the top.
7. With the scale in transport position check that each load cell is loose. If the cells are not loose the lock downs may need to be adjusted.

To check if the cells are loose, with your fingers, press on the body of the load cell, the cell should move easily back and forth. To adjusting the lock downs you must loosen the jam nut on the lock down bolt. With the jam nut loose adjust the lock down bolts, the bolts should be tight against the lift arm but the load cell must remain loose when in the transport position. The load cell must be loose and the lift cylinder must NOT be retracted entirely when in the transport position. If you are unable to achieve an adjustment where the cylinder is slightly extended and the load cell is loose contact you scale dealer.

Yearly

1. Do all required weekly services checking all components of the system.
2. Park system on a slope greater then seven degrees and raise the scale. (For example a steep approach.) Turn on the indicator and check to see if it shuts off in 10 seconds. If the indicator does not shut of you may have a faulty tilt sensor, Consult you local scale dealer. You must do this test in all four directions, front low, rear low, right side low and left side low.
3. Disassemble each load cell location and grease all pins, rodends and eyebolts if applicable. This is very important to ensure the long life of your unit.

Note: Use quality high-pressure grease.
Note: Avoid bending or twisting the load cell wires.

1. Remove each load cell from the pocket and grease the upper and lower load cell pins as well and the lift arm and cylinder pivot points. If your system has rodends with a bushing, manually apply grease and work the bushing around.
2. Do not remove any hydraulic hoses unless you have a qualified person to remove air from the system. The hydraulic lines do not need to be removed to disassemble the system.
3. Thoroughly clean each pocket when the system is dismantled.

Permanent Truck Scale

NORAC weighing products are now manufactured and distributed by Rice Lake Weighing Systems.  For information on weighing products, please visit www.ricelake.com/norac.

The best way to keep your scale operating correctly is to perform regular maintenance. Every scale should be checked with a level or transit periodically to ensure the platform is in the level position.

Check under and around the scale to see if anything may be touching the scale. If anything has built up around or under the scale such as ice, dirt, mud or manure this must be removed. Also check all cables and connectors and replace any components that appear worn or broken.

You should have your scale checked and calibrated once a year by a Certified Scale Technician to ensure proper functioning of your NORAC NORSTEEL™ Platform Truck Scale.

Call NORAC at 1-800-667-3921 for your nearest authorized service dealer.