Rice Lake WLS-C Instruction Manual

115203
WLS-C
Wheel Loader Scale
Installation & User Manual
To be the best by every measure

i
Technical training seminars are available through Rice Lake Weighing Systems.
Course descriptions and dates can be viewed at www.ricelake.com/training
or obtained by calling 715-234-9171 and asking for the training department.
© 2010 Rice Lake Weighing Systems. All rights reserved. Printed in the United States of America.
Specifications subject to change without notice.
Rice Lake Weighing Systems is an ISO 9001 registered company.
Version 1.0, December 2010
Contents
Introduction.............................................................................................................................................. 1
1.0 Installation ................................................................................................................................... 1
1.1 Indicator Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Pressure Sensor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Proximity Sensors Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4 Angle Sensor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.5 Passing and Protecting Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.0 Display Indications and Button Functions ................................................................................. 12
2.1 Indicator Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2 Indicator Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.0 Calibration ................................................................................................................................. 14
3.1 Entering Calibration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.2 Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.3 Angle Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.3.1 Calibration procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.4 Dynamic Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.5 Empty Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.5.1 Performing an Empty Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.5.2 Empty Calibration Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.6 Loaded Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.7 Menu Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.7.1 Setting New Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.8 Calibration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.9 Password (PIN) Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.10 Machine Setting Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.11 Dynamic Setting Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.0 Operation.................................................................................................................................... 24
4.1 Making a Weighment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.2 Setting a New Tare. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.3 Disabling the Weighing Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.4 Setting Max Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.5 Machine Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.6 Correction Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.7 Adjust Display Contrast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.8 Language Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.9 Setting Date and Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.10 Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.11 Printing the Ticket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.12 Menu Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.12.1 Setting New Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.13 User Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

ii WLS-C Wheel Loader Scale
Rice Lake continually offers web-based video training on a growing selection
of product-related topics at no cost. Visit www.ricelake.com/webinars.
4.14 Time Setting Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.15 Sensors Check Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.15.1 Input Status Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.15.2 On/Off Outputs Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.15.3 Pressure Sensor Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.0 Printer (Optional) ....................................................................................................................... 34
5.1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
WLS-C Limited Warranty........................................................................................................................ 37
For More Information ............................................................................................................................. 38

WLS-C Wheel Loader Scale - Installation 1
Introduction
This manual is intended for use by technicians
responsible for installing and servicing the WLS-C
Wheel Loader Scale.
Authorized distributors and their employees
can view or download this manual from the
Rice Lake Weighing Systems distributor site
at www.ricelake.com.
Unpack the contents of the shipment your system
arrived in and verify the contents are correct, using the
packing slip. Check for damage that could have
occurred during shipment, and report any
discrepancies immediately.
Before installing, ensure you have the following:
•Welder
• Mechanical and electrical tools
• Set of assorted wrenches
• Set of assorted screwdrivers
•Grinder
• Voltmeter
• Assorted hydraulic fittings
If washing the machine with a
high-pressure power washer, you
must protect all system components
from direct spraying to avoid damage.
Before installing the WLS-C Wheel Loader Scale,
take the following measures to ensure your safety:
Protective Gear
Always wear safety goggles, as required by safety
conditions, when welding or grinding.
Never wear loose clothing or jewelry, which may get
caught in the machine.
Hydraulic Parts
Discharge all pressure from the hydraulic circuit
before disconnecting or removing any plumbing,
connector, or relative component. Always make
certain that all moving parts have been locked and
check for any residual pressure when disconnecting
any hydraulic plumbing.
Always let the bucket or other similar parts down to
ground-level before carrying out any work on the
machine. If this cannot be done, make sure that bucket
is locked so it cannot come suddenly and
unexpectedly down.
Damaged or detached fuel and lubricant lines can
cause fire. Never bend or strike high pressure lines,
nor put damaged or twisted ones back on. Always
check pipes and ducts.
Repairs
Detach the battery and let any remaining charge out
before carrying out any work on the vehicle.
If possible, have the vehicle brought into a shed or
onto a hard, clean floor.
1.0 Installation
When installing the components, use the appropriate brackets supplied. These can be mounted inside the cab
onto the cab structure. It is recommended that you consult the machine’s operator to ensure the indicator is
mounted in a convenient location based on their needs. Make sure the components do not restrict the operator’s
vision or interfere with bodily movements.
On forklift trucks, the unit is mounted directly under the roof. You will need to make threaded holes in the frame.
Do not attach the brackets to the dashboard or other non-metallic surface. Prior to altering the
cab structure, customer approval should be attained due to EROPS and ROPS certifications.
Warning
Warning

2WLS-C Wheel Loader Scale
Figure 1-1. WLS-C Component List
1.1 Indicator Installation
1. Use the bracket as a template to drill holes. Then, mount the bracket. Or, use the suction cup mount.
2. Fasten screws holding the bracket in place. The bracket can now accept the indicator.
3. Loosen the bracket handle shown in Figure 1-2, find the desired angle, and tighten the handle.
Figure 1-2. Bracket screwed in place
Wire Connect To
PT1 Pressure transducer
PT2 Second pressure transducer (optional)
Prox1 Angle sensor on chassis
Prox2 Angle sensor on boom
Power (Brown/White) Positive terminal on battery
Power (Green/Yellow) Negative terminal on battery
Table 1-1. Cable Harness
Indicator
Indicator with wiring (see
Table 1-1 for cable details)
Pressure transducer
Pressure transducer cable
Angle sensor
Proximity
Sensor and Cable
Bracket handle

WLS-C Wheel Loader Scale - Installation 3
Figure 1-3. Indicator Mounted in Cab
Figure 1-4. Indicator Back
1.2 Pressure Sensor Installation
The pressure sensor reads the main line pressure of the lift cylinder (hydraulic line). Only one sensor is required;
however, the WLS-C Wheel Loader Scale may be used with two pressure sensors if needed. There are two
options for pressure sensor installation:
• Install a flange block where the hydraulic line attaches to the hydraulic fluid distributor. Use one of the
fittings supplied to attach the sensor to the flange block. The kit comes with a few common fittings
which fit the majority of wheel loaders. It may be required to locate special fittings for the installation.
See Figure 1-5 through Figure 1-8 for a list of provided fittings.
NOTE: Some manufacturers do not use flange blocks. In these cases, use a swivel T-fitting.
• Attach the weld-on flange (supplied, see Figure 1-7 4) directly to the hydraulic line. This should be
performed by a qualified welder to ensure proper fitting and seal.
Note: The best source for flange blocks is the local heel loader or skid steer dealer that sold the machine originally. An
alternative source for flange blocks is www.mainmfg.com/mainhome.html.

4WLS-C Wheel Loader Scale
Figure 1-5. 1/4" BSPP Straight Fitting
Figure 1-6. 1/4" NPT Male to 1/4" Female Straight Fitting
Pressure sensors are equipped with 1/4" BSPP
threads; therefore, the fittings shown in Figure 1-5 and
Figure 1-6 can be connected directly to the sensor
with the copper o-ring seal (see Figure 1-9) in
between. This seal must be installed on all sensors to
ensure an air-tight seal.
Notes: The copper o-ring seal has a smooth side and a
rough side. The seal should be installed so the smooth
side touches the sensor.
There is also a rubber gasket on the sensor (see
Figure 1-13 on page 6). Keep this in a safe place until
ready to install, as it falls off easily.
The fittings shown in Figure 1-5, Figure 1-6 and
Figure 1-8 can be connected directly to the valve of
the machine. The weld-on fitting (Figure 1-7) can be
used on the steel tubing of the cylinder line if you
cannot tap the line.
The fitting shown in Figure 1-8 cannot be connected
directly to the pressure sensor due to a 37-degree flare
swivel end.
1. Select the fitting which works best.
2. Attach the fitting to the hydraulic valve.
Note: The hydraulic line may need to be removed if using
the weld-on flange.
3. The fitting should be mounted in a position to
allow it to self-bleed with gravity. If possible,
mount at an angle rather than perpendicular to
the hydraulic line. (See Figure 1-10 through
Figure 1-13 for examples).
Figure 1-7. Weld-on Flange
Figure 1-8. 1/4" NPT male to 1/4" BSPP Female Swivel
90-Degree Fitting
Figure 1-9. Copper O-Ring Seal

WLS-C Wheel Loader Scale - Installation 5
Figure 1-10. Flange Welded to Hydraulic Line at Desired Angle
Figure 1-11. Sensor Mounted at Non-Recommended Angle
Figure 1-12. Sensor Mounted at Recommended Angle

6WLS-C Wheel Loader Scale
Figure 1-13. Sensor Mounted at Recommended Angle; Rubber Gasket Highlighted
4. Place the copper o-ring between the sensor and fitting (with the smooth side towards the sensor) and
tighten the sensor with a crescent wrench.
5. Once the sensor is mounted, the hydraulic line can be bled.
6. After starting the machine, partially loosen the sensor.
7. Wait until fluid leaks out without any air bubbles before tightening it down.
8. Route wire back to the cab. Route along a stationary area; tying to existing electrical lines is
recommended.
9. Tie off excess wire in an open area of the wheel loader.
10. Check for leaks again after running the machine for a short period of time.
1.3 Proximity Sensors Installation
Positioning the proximity sensors is extremely important for the accuracy of weighing during the lifting stage.
You must make sure you install them in such a way that the lifting reference notch activates the first proximity
switch, and that it remains active even when the second has been activated.
If the weighing system is running properly, the acoustic indicator will go off after the second proximity has been
reached. This means a measurement has been made. On the other hand, when the vehicle arm is coming down, it
must first activate the second proximity, and then the first. This is so weighing takes place only during lifting and
not lowering.
In forklift trucks, the distance between the two must be about 20 cm, given the speed at which the forks rise.
This layout has been tested on many different models, and has been seen to be the best, because hydraulic
pressure tends to remain more stable and give a greater proportional increase. For forklifts, we suggest you place
the first switch 40–50 cm above the lowest point. See Figure 1-15 on page 7
NOTE: The proximity switch cannot read if positioned more than 5 mm away from the reading plate. You should always
try to place them about 2–3 mm apart.
Rubber gasket

WLS-C Wheel Loader Scale - Installation 7
Figure 1-14. Location of Installed Proximity Sensor
Figure 1-15. Installation Location of First Switch
40/50 cm

8WLS-C Wheel Loader Scale
1.4 Angle Sensor Installation
Place the chassis and boom angle sensors as shown in Figure 1-16. They should both be horizontal with the
connector in the cabin direction.
Two sensors are necessary because the relative angle between the chassis and the boom is used to perform the
weighing computation.
Figure 1-16. Sensor Placement
1. Using two to three 1" beads, weld the angle sensor’s mounting plate to the inside of the support arm.
Figure 1-17. Angle Sensor Mounting Plate
2. Fasten the sensor housing and angle sensor to the mounting plate.
Mounting plate with angle sensor attached.
Mounting plate

WLS-C Wheel Loader Scale - Installation 9
Figure 1-18. Angle Sensor Installed On Support Arm
NOTE: Angle sensors should be installed in line with the opening and bolt for the arm and must parallel on the boom.
There are 3 bolts on the angle sensor: 1 on top and 2 on the bottom. The angle sensor should be installed so that the 1
bolt side faces up and the side with 2 bolts faces down. If installed correctly, the wire will be toward the cab of the
loader. See Figure 1-19 on page 9.
Figure 1-19. Angle Sensors Installed
Angle Sensor
Angle Sensors

10 WLS-C Wheel Loader Scale
3. Route the sensor’s wire back to the cab.
NOTES: Ensure there is enough slack in the wire to allow the support arm to raise fully without over-tightening the wire.
Route along a stationary area of the wheel loader. Figure 1-20 shows the pressure sensor and angle sensor wires routed
between a stationary cylinder and existing electrical line; this provides optimal protection.
Figure 1-20. Wires Routed Along Existing Electrical Line.
4. Tie off excess wire in an open area of the wheel loader.
1.5 Passing and Protecting Cables
Cables should, if possible, pass along the same route as the electrics cables of your vehicle, or at least where the
hydraulic circuitry passes.
This means that there are basically two cables to protect: proximity and transducer cables.
You should always leave some leeway for the cables. When giving full-lock steering to the left and right, the
cables should not become too tight or too slack.
Figure 1-21. Proper Amount of Slack in Cables
stationary cylinder
pressure and angle
sensor wires
existing electrical
line

WLS-C Wheel Loader Scale - Installation 11
Figure 1-22. Cables Routed Correctly
Do not mount the cables too close to the motor, unless they are well insulated.
If you use clips to fix the cables down, remember not to tighten them too much. Very often, cable breakage is due
to over-tightened clips.
Figure 1-23. Cables Clipped Properly

12 WLS-C Wheel Loader Scale
2.0 Display Indications and Button Functions
2.1 Indicator Display
Once power is applied, the system performs a self-test and displays the software version and the date of the latest
upgrade. For example, WS06_05 (WS06_XX) 28/2/2010 (DD/MM/YY).
Figure 2-1. WLS-C Software Version and Date of Last Update
This screen is visible for only a few moments before it clears and displays the weighing screen.
Figure 2-2. Weighing Screen
1. Total Weight
2. Partial Weight
3. Active Weighing Mode

WLS-C Wheel Loader Scale - Display Indications and Button Functions 13
2.2 Indicator Buttons
Indicator buttons are your interface for communicating with the indicator.
Figure 2-3. Indicator Keypad Buttons
Table 2-1. Keypad Button Functions
Number referenced in
Figure 2-3 Button Function
1
To t a l / P l u s
Press and hold for 3 seconds to zero.
In static weighing mode without input, this button adds the partial load
to the total.
2
Partial/Minus
Partial zeroing button.
3
Print/Enter
Press and hold for 3 seconds to access Operation menu.
Press and release once to print ticket (optional printer)
4
Tare / Se l
Press and release once to memorize new Tare.
Press and hold for 3 seconds for zeroing the Tare value.
5 When lit indicates Tare value is other than zero.
6 When lit indicates Tare value equals zero.
7 Indicator lights warning for maximum load. See “Setting Max Load” on
page 25.for more information.
8 987.65 Total Weight
9 12.34 Partial Weight
10 Symbol of active weighing mode.

14 WLS-C Wheel Loader Scale
3.0 Calibration
To calibrate the WLS-C, you must enter calibration mode. This allows you to alter system settings.
3.1 Entering Calibration Mode
Use the following procedure to access the calibration menu from the operating screen.
1. Press and hold the Print/Enter button until the User Menu appears.
2. Scroll down the menu list using the Partial/Minus button to reach the Setting Menu.
Figure 3-1. Setting Menu
3. Press and release the Print/Enter button to enter the menu.
The display indicates CAL: PIN 0.
Figure 3-2. Enter Calibration PIN
4. Enter the password 4482 to access the calibration area. See “Setting New Values” on page 21. to
complete changes.
Figure 3-3. Calibration PIN Entered
Once the values are entered, follow the procedure below to confirm it.
1. Press and release the Print/Enter button to confirm the changes made.
The asterisk will disappear.
2. Press and release the Partial/Minus button.

WLS-C Wheel Loader Scale - Calibration 15
3. Press and release the Print/Enter button to confirm the password.
You can scroll to another page of the menu by using the Partial/Minus button or go back a menu by pressing and
holding the Tare/Sel button.
3.2 Parameters
Prior to performing the empty and/or loaded calibration on both Dynamic or Static weighing systems, you must
set the system’s general parameters in the Machine Setting menu.
Setting and Saving Parameters
To gain access to the Machine Setting menu press and release the Print/Enter button when in the Setting Menu.
Figure 3-4. Setting Menu
3.3 Angle Calibration
Angle calibration is used with ASC angle sensors only.
Figure 3-5. Angle Setting
Setting Description
Side The position of angle sensor on the boom, (LEFT-RIGHT), press and release the Print/Enter
button to change the mounting side. Left is standard.
Act Angle The actual value of relative angle, or the difference between the angles of boom and chassis.
Angle value if left side should be positive value
Start Ang The value of relative angle for the start weighing point selected.
Get Start Angle Press and release the Print/Enter button to memorize the actual value of relative angle as the start
weighing angle with the boom in the start weighing position. Angle value if left side should be
positive value.
End Ang The value of relative angle for the end weighing.
Get End Angle Press and release the Print/Enter button to memorize the actual value of relative angle as end
weighing angle. Angle value if left side should be positive value
Reset Ang The value of relative angle for concluding the weighing and start with a new weighing.
Table 3-1. Angle Settings

16 WLS-C Wheel Loader Scale
3.3.1 Calibration procedure
1. Scroll to the Get Start Angle menu.
2. Raise the bucket up to the start weighing area point. Bucket should be straight. See Figure 3-6.
3. Press and release the Print/Enter button to store the value.
4. Scroll to the Act Angle and record the value. An example value is 146.
Figure 3-6. Bucket Position for Get Start Angle
5. Raise the bucket until the Act Angle value is 100 points higher than the Start Angle Value. An example
value is 245. See Figure 3-7.
6. Scroll to the Get End Angle and press and release the Print/Enter button to store that end value.
Figure 3-7. Bucket Position for Start Angle Value
7. Lower the bucket about one foot from the ground level. See Figure 3-8.
8. Scroll to the Get Reset Angle menu.
9. Press and release the Print/Enter button to store that value.
Get Reset Angle Press and release the Print/Enter button to memorize the actual value of relative angle to reset the
weighing angle cycle. Should be set around 10 degrees lower than start weigh value. Angle value
if left side should be positive value.
Delete Angles Press and release the Print/Enter button to erase all angles value (Start Ang., End Ang., Reset
Ang.).
Save To save the angle calibration values to the memory. Must be done after completing to save the
data to the memory.
Setting Description
Table 3-1. Angle Settings
Bucket Position
Bucket Position