AccuGrade For Wheel Tractor-Scrapers Caterpillar

Measurement Procedure for the Wheel Tractor-Scraper

The system requires machine dimensions in order to calculate the position of the GPS receivers.

To make these measurements, you need the following equipment:

• 266-2916 GPS Measuring Assembly

• Steel tape or ruler

• Spirit level or straight edge

• Plumb bob

• String line

• Steel framing square

• Laser level

Note: Use the 266-2916 GPS Measuring As instead of measuring directly to the receiver. If you do not have a measurement tool for the receiver, the measurement of height should be made to the top of the lower housing on the receiver.

Positioning the Machine

In order to position the machine for the measurements, complete the following steps:

1. Park the machine on level ground.

   Ensure that the floor of the scraper bowl is all the way forward into the guide on machines with a elevator.

2. Lower the cutting edge onto the ground.

3. Turn the cab of the machine all the way to the right. This will provide access to the mast of the GPS receiver for the measurements.

The machine is now in a position in order to record the measurements.

Using the Measurement Tool

The 266-2916 GPS Measuring Assembly allows you to measure the following:

• height of the receiver above the cutting edge bolts

• horizontal distance of the receiver from the left side of the inside wall of the bowl

The 266-2916 GPS Measuring Assembly consists of the following components:

• A length of alloy that is angled with slots and mounting holes on both sides

• Mounting bracket of a receiver

Note: Refer to Illustration 1.

Illustration 1	g01189264
Measurement tool and mounting bracket

Before you start the measurement you need to mount the angled alloy on the mounting bracket. The measurement tool must be mounted on the correct side so that the units are marked on the horizontal surface. Mount the measurement tool on top of the mast of the GPS receiver during the process of measurement.

Note: Caterpillar recommends using the metric slots for more precise measurements.

Mast Measurements

"Distance back from Cutting Edge Bolts"

Complete the following steps for the measurement of the offset of the receiver (20) from the mounting bolts of the cutting edge :

1. Remove the receiver from the mast.

2. Slide the measurement tool onto the top of the mast.

3. Rotate the measurement tool so that the tool is parallel to the cutting edge of the bowl. Refer to Illustration 2.

   A laser level can be used in order to ensure that the measurement tool is parallel to the cutting edge.

Show/hide table



Illustration 2	g01524536

4. Secure the plumb bob line from one of the notches in the measurement tool so that the plumb bob line hangs in front of the mounting bolts of the cutting edge.

   In order to improve accuracy, use a notch that is as close to the mast as possible.

   Note: Record the number that is shown on the measurement tool beside the notch that the plumb bob line is in. This distance is used in Step 6.

Show/hide table



Illustration 3	g01189282
Measurement tool in a parallel position to the cutting edge

5. With the steel framing square, measure the distance from the plumb bob line to the center of the mounting bolts for the cutting edge. Refer to Illustration 4.

Show/hide table



Illustration 4	g01423578
Measuring the distance from the plumb bob line to the center of the mounting bolts for the cutting edge

6. Subtract the value that was measured in Step 4 from the distance shown on the notch of the measurement tool. This is the "Back from cutting edge bolts" distance.

7. Enter this value into the "Back from cutting edge" dialog.

"Height above Cutting Edge Bolts"

In order to measure the height of the top of the mast above the cutting edge bolts, complete the following steps:

1. Leave the measurement tool in the same position that you used in order to take the "Distance back from the cutting edge bolts" measurement.

2. Anchor the measuring tape onto the measurement tool and then measure to the center of the mounting bolts of the cutting edge. Refer to Illustration 5 and 6.

Show/hide table



Illustration 5	g01189296
Measuring from the measurement tool

Show/hide table



Illustration 6	g01424000
Measuring to the center of the mounting bolts for the cutting edge

3. Use a spirit level in order to ensure that the measurement tool is level.

   Note: The end of the spirit level must be directly over the center of the mast.

4. Ensure that the "Measure height to:" field is set correctly.

5. Enter this value into the "Above cutting edge bolts" field in the "Mast Measurements" dialog.

"Distance in from Left Blade Tip"

In order to measure the offsets of the center of the mast to the outside of the left side of the inside wall of the bowl, complete the following steps:

1. Leave the measurement tool in the same position that was used in order to take the "Height above cutting edge bolts" measurement.

2. Secure a plumb bob line from one of the notches on the measurement tool, so that the plumb bob is as close to the mast as possible but still reaches near the cutting edge. Refer to Illustration 7.

3. Measure the horizontal distance from the from the plumb bob line to the inside of the left wall of the bowl. Refer to Illustration 7.

Show/hide table



Illustration 7	g01459496

4. Subtract the distance shown on the notch of the measurement tool from the distance that was measured in Step 3 in order to calculate the "In from left blade tip" distance.

5. Enter this value into the "In from left blade tip" field in the "Mast Measurements" dialog.

Blade Dimension Measurements

This section outlines the measurements that are required for the blade and the cutting edge.

"Measure the Blade Width"

1. Measure the width of the bowl between the inside walls of the bowl. Refer to Illustration 8.

Show/hide table



Illustration 8	g01424148
Measuring the width of the bowl

2. Enter the value into the "Blade width between tips" field in the "Blade Dimensions" dialog.

Cutting Edge Measurements

In order to measure the cutting edge, a spirit level and a steel tape or ruler are required.

The following sections describe the procedure that is used in order to measure the horizontal and vertical cutting edge distances. Alternatively, you can measure the direct distance from the center of the mounting bolts for the cutting edge to the cutting edge.

In order to change the method of measurement, press the "Edge: H. / V." soft key, in the "Blade Dimensions" dialog.

Check to ensure that the calculated distance in the "Cutting edge height" field equals the distance that you measured.

Note: If a stinger is attached to the straight cutting edge, measurements are made to the stinger. However, if teeth are attached to the cutting edge, the measurements are made to the cutting edge and not the teeth.

"Measure the Cutting Edge Horizontal Distance"

Note: This section describes the procedure that is used in order to measure and enter the cutting edge horizontal distance (distance "I" on the measure up worksheet). If you measured the cutting edge height (distance J on the measure up worksheet), you must press the "Edge H. / V." soft key in order to activate the "Cutting edge height" field.

In order to measure the horizontal distance from the center of the mounting bolts for the cutting edge to the cutting edge, complete the following steps:

1. Stand the spirit level against the front of the cutting edge.

2. Ensure that the spirit level is vertical.

3. Measure the horizontal distance from the center of the mounting bolts for the cutting edge to the nearest edge of the spirit level. Refer to Illustration 9.

Show/hide table



Illustration 9	g01458781
Measuring the horizontal distance

4. Enter this value into the "Cutting edge horizontal distance" field in the "Blade Dimensions" dialog.

"Measure the Cutting Edge Vertical Distance"

Note: This example shows the procedure that is used in order to measure the cutting edge vertical distance (distance K on the measure up worksheet). If you measured the cutting edge angle (distance L on the measure up worksheet), you must press the "Edge H. / V." soft key to activate the "Cutting edge angle" field.

In order to measure the vertical distance from the center of the mounting bolts for the cutting edge to the cutting edge, complete the following steps:

1. Rest the spirit level on the center of the mounting bolts for the cutting edge.

2. Ensure that the spirit level is horizontal.

3. Measure the vertical distance from the bottom edge of the spirit level to the tip of the cutting edge. Refer to Illustration 10.

Show/hide table



Illustration 10	g01458817
Measuring the vertical distance

4. Enter this value into the "Cutting edge vertical distance" dialog in the "Blade Dimensions" menu.

Alternative Method to Measure the Cutting Edge

Use this method if you selected "Edge: Angle" in the "Blade Dimensions" dialog.

"Cutting Edge Height"

In order to measure the cutting edge height vertical distance from the bolts for the cutting edge to the cutting edge, complete the following steps:

1. Rest the spirit level on the center of the mounting bolts for the cutting edge.

2. Make sure that the spirit level is horizontal.

3. Measure the vertical distance from the bottom edge of the spirit level to the tip of the cutting edge. Refer to Illustration 11.

Show/hide table



Illustration 11	g01424154
Measuring the vertical distance

4. Enter this value into the "Cutting edge height" dialog in the "Blade Dimensions" menu.

   Note: If the blade is equipped with a stinger cutting edge, the measurement must be taken from the bolts for the cutting edge to the tip of the cutting edge on the stinger.

"Cutting Edge Angle"

In order to measure the angle of the cutting edge, complete the following steps:

1. Use the angle locator in order to measure the angle of the cutting edge. Refer to Illustration 12.

Show/hide table



Illustration 12	g01459022
Using an angle locator in order to find the angle of the cutting edge

2. Enter this value into the "Cutting edge angle" dialog in the "Blade Dimensions" menu.

Measuring the Machine Body

Note: The machine body measurements are only used for avoidance zone calculations. The machine icon on the screen does not change in size, and only approximates the machine.

In order to measure the distance back from the cutting edge to be used for avoidance zone calculations, complete the following steps:

1. Measure the distance from the front of the machine to the cutting edge.

2. Enter this value into the "Distance from the front of the machine to the cutting edge" dialog.

3. Measure the distance from the back of the machine to the cutting edge.

4. Enter this value into the "Distance from the back of the machine to the cutting edge" dialog.

Enter the Machine Dimensions

Use the "Setup Menu-Installation" dialog to enter machine settings into the AccuGrade System.

Show/hide table



Illustration 13	g01309303
(7) LCD (8) Soft Key Labels (9) Soft Keys (10) Escape Key (11 ) Next Key (12) Power Key (13) "+" Key (14) Arrow Keys (15) "-" Key (16) "OK" Key (17) Menu Key (18) "Data Card Slot"

1. In order to enter service mode, hold down the "OK" key while the display powers up.

   Note: Keep a copy of all machine settings because you may need to enter the measurements again. To record the settings on each machine, use the "Machine Measurements Worksheet" section that is provided in this document.

   Note: You must set the measurement parameters before using the system.

2. Press the menu key.

Show/hide table



Illustration 14	g01458541

3. Press the "Installation" key in order to access the "Installation" menu.

   Use the arrow keys in order to select the "Machine Dimensions" option.

   Refer to Illustration 14.

4. Press the "OK" key.

5. Use the arrow keys in order to select the "Machine Dimensions" option and press the "OK" key.

Show/hide table



Illustration 15	g01425195

6. Use the arrow keys to enter the "Mast Measurements". Use the next key in order to navigate between options.

Show/hide table



Illustration 16	g01425251

7. When all of the information has been entered, press the "Cutting Edge" soft key.

   Use the arrow keys to enter the "Blade Dimensions". Use the next key to navigate between options.

Show/hide table



Illustration 17	g01425263

8. When all of the information has been entered, press the "Machine Body" soft key.

   Use the arrow keys to enter the "Machine Dimensions". Use the next key to navigate between options.

9. When all the information has been entered, press the "OK" key in order to save the data and exit.

Display Settings Worksheet

Table 1

Configuration Menu	Soft key	Field	Setting/value
Avoidance Zone		Warning Distance
Beeper		Above Grade
Beeper		Below Grade
Beeper		On Grade
Beeper		Warning Messages
Beeper		GPS Accuracy
Beeper		Key / Switch Beeps
Text Items	"Plan View"	Line 1
Text Items	"Plan View"	Line 2
Text Items	"Plan View"	Line 3
Text Items	"Plan View"	Line 4
Text Items	"Plan View"	Line 5
Text Items	"Cross-section"	Line 1
Text Items	"Cross-section"	Line 2
Text Items	"Cross-section"	Line 3
Text Items	"Cross-section"	Line 4
Text Items	"Cross-section"	Line 5
Text Items	"Text View 1"	Line 1
Text Items	"Text View 1"	Line 2
Text Items	"Text View 1"	Line 3
Text Items	"Text View 1"	Line 4
Text Items	"Text View 1"	Line 5
Text Items	"Text View 2"	Line 1
Text Items	"Text View 2"	Line 2
Text Items	"Text View 2"	Line 3
Text Items	"Text View 2"	Line 4
Text Items	"Text View 2"	Line 5
Text Items	"Profile View"	Line 1
Text Items	"Profile View"	Line 2
Text Items	"Profile View"	Line 3
Text Items	"Profile View"	Line 4
Text Items	"Profile View"	Line 5
Display Direction		Display Direction
Map Recording		Map Recording
Avoidance Zone		Warning Distance
Plan View		Roatation
Plan View		Autopan

Table 2

Installation menu	Softkey	Field	Setting/value
Machine Settings		Machine type
Machine Settings		Radio Type
Machine Settings		Lightbar
Units	"Distance"	Distance Units
Units	"Speed"	Distance Units
Units	"Grade"	Grade Units
Units	"Cross Slope"	Cross Slope Units
Units	"Station Format"	Station Format
Machine Dimensions	"Receiver"	Height (to top of lower housing)
Machine Dimensions	"Receiver"	Back from cutting edge
Machine Dimensions	"Receiver"	In from left blade tip
Machine Dimensions	"Machine Body"	Distance from the front of the machine to the cutting edge
Machine Dimensions	"Machine Body"	Distance from the back of the machine to the cutting edge

Machine Measurements Worksheet

Use the Tables below in order to record the measurements of the machine.

Table 3

Units
Machine
Date

Scraper Mast Measurements

Illustration 18	g01458570
Mast Measurements

Table 4

Measure Height to:
Measure-Up Tool
Top of lower housing
Top of mast

Table 5

Center Mast
A = Back from cutting edge bolts (- = fwd)
B = Above cutting edge bolts
C = In from left blade tip (- = out)

Scraper Blade Measurements

Illustration 19	g01458595
Blade Measurements

Table 6

D = Blade width between tips

Illustration 20	g01458624
Edge Measurements

Table 7

Edge Measurement (Edge: H. / V. or Edge: Angle)
I = Cutting edge horizontal distance / J = Cutting edge height
K = Cutting edge vertical distance / L = Cutting edge angle

Illustration 21	g01459638
Stinger blade not extended

Illustration 22	g01459643
Stinger blade extended

Scraper Machine Body Measurements

Illustration 23	g01458629
Body Measurements

Table 8

N = Distance from the front of the machine to the cutting edge
O = Distance from the back of the machine to the cutting edge