Installation of the 6A Bulldozer on a D6T Track-Type Tractor{6050, 6052, 6060, 6701} Caterpillar

Track-Type Tractor:

D6T (S/N: MEL1-UP; KMR1-UP; SGT1-UP; TMY1-UP; HTZ1-UP; CG81-UP)

Introduction

This Special Instruction provides the procedure for installation of the lift cylinders and the 6A Bulldozer.

Note: Each section contains the related parts list.

When you have completed this procedure, prepare the machine for service. Refer to the Operation and Maintenance Manual.

Note: Do not perform any procedure in this Special Instruction until the information has been read and understood.

ReferenceService Manual, Parts Manual, Operation and Maintenance Manual.

Warnings

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Do not attempt to assemble this machine until you read and you understand the assembly instructions. Improper assembly procedures could result in injury or death.

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Personal injury or death can result from sudden machine movement. Sudden movement of the machine can cause injury to persons on or near the machine. To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine.

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NOTICE
Do not let any dirt or foreign material get into the hydraulic system during assembly or maintenance operations. Keep the oil in the hydraulic system at the correct level to prevent pump cavitation. Clean all surfaces where parts are to be installed.

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NOTICE
When a hoist is used to lift any component, stand clear of the area. Always make sure that the hoist has the correct capacity. Approximate weights of the components are shown in Tables 1 through 4.

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NOTICE
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products. Dispose of all fluids according to local regulations and mandates.

Note: No oil or lubricant is recommended on new fasteners. When fasteners are reused after being used in the field, the fasteners should be cleaned and lightly oiled before assembly. Instructions are given when lubrication is required.

Weights

Table 1

Weights for Specified Components of the Lift Cylinder
Description	Weight
Yoke (each)	23 kg (51 lb)
Lift Cylinder (each)	92 kg (203 lb)

Table 2

Weights for Specified Components of the 6A Blade (XL)
Description	Weight
Blade	1194.6 kg (2633.6 lb) XL
	1299.6 kg (2865.2 lb) XW
	1456.5 kg (3211.0 lb) LGP
C-Frame	1114.4 kg (2456.9 lb) XL
	1585.9 kg (3496.3 lb) XW
	1375.1 kg (3031.6 lb) LGP
Arm Assembly (each)	64 kg (141 lb)
Tilt Cylinder (each)	111 kg (245 lb)
Trunnion	17 kg (38 lb)

Table 3

Weights for Specified Components of the 6A Blade (XW)
Description	Weight
Blade	1337 kg (2948 lb)
C-Frame	1163 kg (2564 lb)
Arm Assembly (each)	76 kg (168 lb)
Tilt Cylinder (each)	111 kg (245 lb)
Trunnion	17 kg (38 lb)
Plate behind trunnion	19 kg (42 lb)

Table 4

Weights for Specified Components of the 6A Blade (LGP)
Description	Weight
Blade	1511 kg (3331 lb)
C-Frame	1398 kg (3082 lb)
Arm Assembly (each)	84 kg (185 lb)
Tilt Cylinder (each)	111 kg (245 lb)
Trunnion	17 kg (38 lb)
Trunnion Support	49 kg (108 lb)

Required Parts

Table 5

387-8324 Bulldozer Ar  (1) 433-0335 Bulldozer Ar  (2) 387-8373 Bulldozer Ar  (3)
Qty	Part Number	Description
1	6Y-6751	Pin
1	109-1352 (1)	Bulldozer Trunnion Gp
	4Z-9412 (2)
	109-1353 (3)
1	251-9814 (1)	Bulldozer Brace
	358-0111 (2)
	348-6701 (3)
4	251-9827 (1)	Trunnion
	251-9827 (2) (3)
1	251-9829	Retainer
1	387-8325 (1)	C Frame Gp
	442-8008 (2)
	334-1783 (3)
1	442-8011 (1)	Tilt Lines Gp
	442-8014 (2)
	387-8374 (3)
1	453-1020 (1) (2)	Grade Control Wiring Gp
	453-1021 (3)
16	7X-2563	Bolt
1	7X-2553 (2) (3)	Bolt

( 1 )	XL
( 2 )	XW
( 3 )	LGP

Table 6

Angling Blade and Edge Groups
Qty	Part Number	Description
1	433-0319 (1)	Blade and Edge
1	433-0321 (2)	Blade and Edge
1	433-0323 (3)	Blade and Edge

( 1 )	XL
( 2 )	XW
( 3 )	LGP

Procedure for Shimming

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Illustration 1	g00292740

1. Remove all of the shims from C-frame (1) .

2. Remove excess rust and paint from the contact surfaces of these components: the C-frame, the cap and the shims.

3. Install C-frame (1) and cap (2) on trunnion (3) without shims. Use the largest torque from the following list in order to tighten the bolts.
   • Five percent of the specified torque

   • 50 N·m (37 lb ft)

   Maintain equal distance on both space (A) and space (B) of cap (2). Observe spaces (A) and (B) in order to determine the required number of shims.

4. Loosen the bolts that are on cap (2). As needed, insert shims into spaces (A) and (B). When possible, use an equal number of shims for spaces (A) and (B) .

   Note: The number of shims at space (A) must be within one of the number of shims at space (B). For example, if space (A) has eight shims, space (B) must have seven, eight, or nine shims.

5. Add one additional shim to space (A). Add one additional shim to space (B) .

6. Tighten the bolts that are on cap (2) to the proper torque.

7. The C-frame should move freely on the trunnion. The specified minimum tolerance is 0.25 mm (0.010 inch).

   Note: Removing one or more shims may be necessary after time. Wear can be caused by normal vibrations of the surface or variations in the thickness of the paint.

Installation of Trunnions (XL Undercarriage)

Necessary Parts

Table 7

109-1352 Bulldozer Trunnion
Item	Qty	Part Number	Description
1	2	285-0852	Trunnion
2	20	7X-2563	Bolt
3	2	-	Guide Stud (1)

( 1 )

Install guide studs with the same thread size and with a length of approximately 179 to 190 mm (7 to 7 1/2 inch).

Installation Procedure

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Illustration 2	g00613704

Note: The shipping covers must remain with the machine. If the trunnions are removed, install the shipping covers before you operate the machine.

1. Remove shipping cover (A) from the track roller frame.

   Note: Remove paint from mating surfaces. Clean all the surfaces of the parts that will be installed.

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Illustration 3	g03629956

2. Install two guide studs (3) in the track roller frame, as shown.

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Illustration 4	g00476283

3. Position trunnion (1) on the guide studs.

4. Install eight bolts of ten bolts (2) . Remove the two guide studs and install two remaining bolts (2). Tighten all bolts (2) to a torque of 530 ± 70 N·m (390 ± 50 lb ft).

5. Repeat Steps 1 through 4 for the other side of the machine.

Installation of Trunnions (XW Undercarriage)

Necessary Parts

Table 8

4Z-9412 Bulldozer Trunnion
Item	Qty	Part Number	Description
1	2	285-0852	Trunnion
2	20	8C-8478	Bolt
3	20	8T-4123	Plated Washer (35 mm by 3.5 mm)
4	2	4Z-9228	Plate
5	2	-	Guide Stud (1)

( 1 )

Install guide studs with the same thread size and with a length of approximately 179 to 190 mm (7 to 7 1/2 inch).

Installation Procedure

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Illustration 5	g00613704

Note: The shipping covers must remain with the machine. If the trunnions are removed, install the shipping covers before you operate the machine.

1. Remove shipping cover (A) from the track roller frame.

   Note: Remove paint from mating surfaces. Clean all the surfaces of the parts that will be installed.

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Illustration 6	g03629998

2. Install two guide studs (5) in the track roller frame, as shown.

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Illustration 7	g00632460

3. Position plate (4) on the guide studs.

4. Position trunnion (1) on the guide studs.

5. Install eight bolts of ten bolts (2) and eight washers of ten washers (3). Remove the two guide studs and install two remaining bolts (2) and washers (3). Tighten all bolts (2) to a torque of 530 ± 70 N·m (390 ± 50 lb ft).

6. Repeat Steps 1 through 4 for the other side of the machine.

Installation of Trunnions (LGP Undercarriage)

Necessary Parts

Table 9

109-1353 Bulldozer Trunnion Gp
Item	Part Number	Description	Qty
1	285-0852	Trunnion	2
2	7X-2563	Bolt	44
3	8T-4123	Plated Washer (35 mm by 3.5 mm)	24
4	109-1354	Support	2
5	-	Guide Stud (1)	2

( 1 )

Install guide studs with the same thread size and with a length of approximately 179 to 190 mm (7 to 7 1/2 inch).

Installation Procedure

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Illustration 8	g00617547

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Illustration 9	g00617980

Note: Remove paint from mating surfaces. Clean all surfaces of the parts that will be installed.

1. Install guide studs (5) in the track roller frame, as shown.

2. Position support (4) on guide studs (5) .

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Illustration 10	g00617780

3. First, install ten of twelve bolts (2) and washers (3) in support (4). Next, remove the two guide studs. Install remaining two bolts (2) and washers (3). Tighten bolts (2) to a torque of 530 ± 70 N·m (390 ± 50 lb ft).

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Illustration 11	g00617768

4. Install guide studs (5) in support (4) .

5. Position trunnion (1) on guide studs (5), as shown.

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Illustration 12	g00618089

6. First, install eight of ten bolts (2). Then remove the guide studs. Install remaining two bolts (2). Tighten bolts (2) to a torque of 530 ± 70 N·m (390 ± 50 lb ft).

7. Repeat Steps 1 through 6 for the other side of the machine.

Install Tilt Lines to Blade

Necessary Parts

Table 10

Angling Blade and Edge Groups
Item	Qty	Part Number	Description
1	1	433-0319 (1)	Blade and Edge
	1	433-0321 (2)	Blade and Edge
	1	433-0323 (3)	Blade and Edge

( 1 )	XL
( 2 )	XW
( 3 )	LGP

Table 11

442-8011 Tilt Cylinder Lines Gp  (1) 442-8014 Tilt Cylinder Lines Gp  (2) 387-8374 Tilt Cylinder Lines Gp  (3)
Item	Qty	Part Number	Description
2	2	251-9840 (1) (2)	Tube As
		288-8480 (3)
3	1	251-9841 (1) (2)	Tube As
		288-8481 (3)
4	6	5S-8712	Block
5	6	8T-4182	Bolt
6	6	8T-4121	Hard Washer

( 1 )	XL
( 2 )	XW
( 3 )	LGP

Install Procedure

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Illustration 13	g02326013

1. Raise and block the bulldozer blade (1) in an upright position.

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Illustration 14	g03648976

2. Use six blocks (4), six washers (6), and six bolts (5) in order to install tube (3) and two tubes (2) to the blocks on the bulldozer blade. Tighten bolts (5) to a torque of 60 ± 12 N·m (45 ± 9 lb ft).

Installing C-Frame

Necessary Parts

Table 12

Angling Blade and Edge Groups
Item	Qty	Part Number	Description
1	1	433-0319 (1)	Blade and Edge
	1	433-0321 (2)	Blade and Edge
	1	433-0323 (3)	Blade and Edge
387-8324 Bulldozer Installation Ar  (1) 433-0335 Bulldozer Installation Ar  (2) 387-8373 Bulldozer Installation Ar  (3)
Item	Qty	Part Number	Description
2	1	6Y-6751 (1)	Pin
3	1	251-9829 (2)	Retainer
4	1	7X-2557 (3)	Bolt
387-8325 C-Frame Gp  (1) 442-8008 C-Frame Gp  (2) 334-1783 C-Frame Gp  (3)
Item	Qty	Part Number	Description
5	1	1U-0725	Retainer
6	2	7X-2562	Bolt
7	1	251-9832	Pivot Pin
8	1	387-8326 (1)	C-Frame
		442-8009 (2)
		334-1784 (3)
9	52	4T-4866	Shim
10	4	251-8203	Square Nut
11	2	251-9836	Bearing Cap
12	4	7X-2567	Bolt
13	4	8T-4167	Hard Washer

( 1 )	XL
( 2 )	XW
( 3 )	LGP

Install Procedure

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Illustration 15	g03649005

1. Raise and block the bulldozer blade (1) in an upright position.

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Illustration 16	g03649141

2. Insert pivot pin (7) through C-frame (8). Install retainer (5) with two bolts (6) to pivot pin (7). Tighten bolts (6) to a torque of 530 ± 70 N·m (390 ± 50 lb ft).

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Illustration 17	g03649144

3. Align C-frame (8) with the bulldozer blade. Use pin (2) and retainer (3) with bolt (4) in order to install pivot pin (7) to the bulldozer blade. Tighten bolt (4) to a torque of 270 ± 40 N·m (200 ± 30 lb ft)

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Illustration 18	g03649174

4. Measure the height from the ground to the center of the trunnion on the roller frame.

5. Raise the rear center of C-frame (8) and block up the C-frame to the height that was measured in Step 9.

6. Move the machine into position. The machine should be inside C-frame (8). Stop the engine.

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Illustration 19	g03649182

7. Use these components to install C-frame (8) to the trunnion: bearing cap (11), shims (9), two washers (13), two nuts (10) and two bolts (12). For instructions on shimming, refer to ""Procedure for Shimming" ". Tighten the bolts to a torque of 900 ± 100 N·m (665 ± 75 lb ft).

8. Repeat Step 7 for the other side of the machine.

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Personal injury or death can result if the lift cylinder is not secured when the lift cylinder is being attached to the blade or detached from the blade. The lift cylinders can rotate freely rearward when the cylinder rod is retracted. Secure the lift cylinder until the cylinder rod is extended in order to prevent the lift cylinder from rotating rearward.

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Illustration 20	g03649185

9. Remove the shipping brackets from the lift cylinders. Store the shipping bracket for future use.

10. Use the cap, the shims, the four bolts, and the four nuts to connect lift cylinder (B) to C-frame (8). Use 8E-9212 Shims as required to obtain a minimal clearance. Tighten the nuts to a torque of 460 ± 60 N·m (340 ± 40 lb ft).

Note: Those parts that are not numbered are components of the lift cylinder.

11. Repeat Steps 14 and 15 for the other side of the machine.

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Illustration 21	g03658059

12. An improperly adjusted brace causes binding between the surface of pivot pin (7) and the surface of the bracket on the bulldozer blade. Check clearance (H) between pivot pin (7) and C-frame (8). This clearance check should be done with the blade on the ground and the braces should be pinned in the middle position. If clearance (H) is not in the 25 to 30 mm (1.0 to 1.2 inch) range, then adjust the push arms on both sides of the machine. See Illustration 21.

Install Bulldozer Brace Gp

Necessary Parts

Table 13

251-9814 Bulldozer Brace  (1) 358-0111 Bulldozer Brace  (2) 348-6701 Bulldozer Brace  (3)
Item	Qty	Part Number	Description
1	2	1U-1176	Pin
2	2	3B-4626	Cotter Pin
3	2	3J-1770	Lock Pin
4	2	3J-6573	Adjustment Screw
5	2	4F-0255	Pin
6	2	4F-1252	Pin
7	2	4T-5495	Ball Stud
8	52	8E-5701	Shim
9	2	160-6306	Bearing Cap
10	2	227-0841	Tilt Cylinder Gp
11	1	251-9815 (1)	Arm As
		358-0112 (2)
		348-6703 (3)
12	1	251-9816 (1)	Arm As
		358-0113 (2)
		348-6702 (3)
13	4	251-9828	Bearing Cap
14	104	251-9834	Shim
15	8	7X-2564	Bolt
16	8	8T-4123	Washer
17	4	8T-4187	Bolt
18	8	8T-6381	Bolt
387-8324 Bulldozer Installation Ar  (1) 433-0335 Bulldozer Installation Ar  (2) 387-8373 Bulldozer Installation Ar  (3)
19	4	251-9827	Trunnion
20	16	7X-2563	Bolt

( 1 )	XL
( 2 )	XW
( 3 )	LGP

Install Procedure

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Illustration 22	g03649541

1. Apply a heavy coat of multipurpose grease to the threaded surfaces on adjustment screw (4) .

   Note: The trunnion and cap in illustration 22 is installed in the next steps.

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Illustration 23	g03649543
(C) 2045 mm (80.5 inch) for the S/N:LGP bulldozer (C) 1875 mm (73.8 inch) for the S/N:XW bulldozer (C) 1737 mm (68.4 inch) for the S/N:XL (29) Push arm (34) Adjustment screw

2. Adjust push arm (11) or (12) to dimension (C) with adjustment screw (4). See Illustration 23.

   Note: The dimensions that are shown in Illustration 23 are without the caps or the shims. The measurement is from one edge to the other edge.

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Illustration 24	g03649545

3. Use cap (13), shims (14), and four bolts (15) to install trunnion (19) to push arm (11) or (12). Refer to ""Procedure for Shimming" " for instructions on shimming. Tighten bolts (15) to a torque of 530 ± 70 N·m (390 ± 50 lb ft).

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Illustration 25	g03649556

4. Install push arm (11) or (12) to bulldozer blade with four bolts (20). Tighten bolts (20) to a torque of 530 ± 70 N·m (390 ± 50 lb ft).

5. Repeat Steps 18 through 1 for the other side of the machine.

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Illustration 26	g03649562

6. Use cap (9), shims (8), and two bolts (17) to install ball stud (7) on push arm (11) or (12). Refer to ""Procedure for Shimming" " for instructions on shimming. Tighten bolts (17) to a torque of 530 ± 70 N·m (390 ± 50 lb ft).

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Illustration 27	g03649573

7. Use pin (3) and pin (6) to install push arm (11) or (12) with ball stud (7) to the C-frame.

8. Repeat Steps 6 and 7 for the other side of the machine.

Install Tilt Cylinders and Tilt Cylinder Lines

Necessary Parts

Table 14

442-8011 Tilt Cylinder Lines Gp  (1) 442-8014 Tilt Cylinder Lines Gp  (2) 387-8374 Tilt Cylinder Lines Gp  (2)
Item	Qty	Part Number	Description
1	6	5S-8712	Block
2	1	5S-8765 (1) (2)	Guard
		288-8473 (3)
3	1	5S-8766 (1) (2)	Guard
		288-8472 (3)
4	1	6Y-0596	Guard As
5	1	6Y-0597	Guard As
6	2	9W-9082 (1)	Hose As
		4Z-9463 (2)
		308-0487 (3)
7	2	9W-9083	Hose As
		4Z-9464 (2)
		308-0486 (3)
8	1	245-4230	Bracket As
9	1	245-4231	Bracket As
10	2	251-9840 (1) (2)	Tube As
		288-8480 (3)
11	1	251-9841 (1) (2)	Tube As
		288-8481 (3)
12	1	442-8033	Guard As
13	1	442-8034	Plate As
14	1	453-4748 (1) (2)	Hose As
		433-0340 (3)
15	1	453-6065 (1) (2)	Hose As
		453-6114 (3)
16	2	3G-8047	Grommet
17	2	3G-8054	Clip
18	2	3G-8057	Clip
19	12	4J-5267	O-Ring Seal
20	2	5P-7464	Clip
21	2	5P-7465	Clip
22	2	6V-1249	Grommet
23	20	8C-3205	Half Flange
24	52 (1) (2) 50 (3)	8T-4121	Hard Washer
25	10	8T-4139	Bolt
26	6	8T-4182	Bolt
27	46 (1) (2) 44 (3)	8T-4195	Bolt
28	16 (1) (2) 18 (3)	8T-4223	Hard Washer
29	6	8T-4910	Bolt
387-8324 Bulldozer Installation Ar  (1) 433-0335 Bulldozer Installation Ar  (2) 387-8373 Bulldozer Installation Ar  (3)
Item	Qty	Part Number	Description
30	4	251-9827	Trunnion
31	16	7X-2563	Bolt
251-9814 Bulldozer Brace  (1) 358-0111 Bulldozer Brace  (2) 348-6701 Bulldozer Brace  (3)
Item	Qty	Part Number	Description
32	2	227-0841	Tilt Cylinder Gp
33	4	251-9828	Bearing Cap
34	104	251-9834	Shim
35	8	8T-4123	Washer
36	8	8T-6381	Bolt
37	1	251-9815 (1)	Arm As
		358-0112 (2)
		348-6703 (3)
38	1	251-9816 (1)	Arm As
		358-0113 (2)
		348-6702 (3)
39	2	1U-1176	Pin
40	2	4F-0255	Pin
41	2	3B-4626	Cotter Pin

( 1 )	XL
( 2 )	XW
( 2 )	LGP

Install Procedure

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Illustration 28	g03649894

1. Use O-ring seal (19), two flanges (23), four washers (24), and four bolts (52) to connect hose (6) and hose (7) to the tilt cylinder. Drain the oil from the tilt cylinder. Tighten bolts (27) to a torque of 60 ± 12 N·m (45 ± 9 lb ft).

2. Repeat Step 10 for the other cylinder.

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Illustration 29	g03649900

3. Extend tilt cylinder (32) in order to allow the clearance of bolt (36) .

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Illustration 30	g03649904

4. Use bearing cap (33), shims (34), four washers (35), and four bolts (36) to install trunnion (30) to tilt cylinder (32). Refer to ""Procedure for Shimming" " for instructions on shimming. Tighten bolts (36) to a torque of 530 ± 70 N·m (390 ± 50 lb ft).

5. Install tilt cylinder (32) to the bulldozer blade with four bolts (31). Tighten bolts (31) to a torque of 530 ± 70 N·m (390 ± 50 lb ft).

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Illustration 31	g03649908

6. Use pin (39), pin (40), and cotter (41) to install the other end of tilt cylinder (32) on push arm (37) or (38). Extend tilt cylinder (32) to approximately 1315 mm (52.0 inch). This measurement is between the center of the eye at the head end to the center of the eye at the rod end.

7. Repeat Step 15 for the opposite side of the machine.

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Illustration 32	g03649910

8. Use O-ring seal (19), two flanges (23), four hard washers (24), and four bolts (27) to connect hose (7) to tube (11) on the bulldozer blade. Tighten bolts (27) to a torque of 60 ± 12 N·m (45 ± 9 lb ft).

9. Use O-ring seal (19), two flanges (23), four hard washers (24), and four bolts (27) to connect hose (6) to tube (10) on the bulldozer blade. Tighten bolts (27) to a torque of 60 ± 12 N·m (45 ± 9 lb ft).

10. Repeat Steps 10 through 18 for the other side of the machine.

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Illustration 33	g03649923
Refer to Illustration 33 for the left side.

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Illustration 34	g03649924
Refer to Illustration 34 for the right side.

11. Use three hard washers (28) and three bolts (25) to install guards (4) and (5) to the tilt cylinder. Tighten bolts (25) to a torque of 105 ± 20 N·m (75 ± 15 lb ft).

12. Use hard washer (28) and bolt (25) to install brackets (8) and (9) to guards (4) and (5) and to the tilt cylinder. Tighten bolt (25) to a torque of 105 ± 20 N·m (75 ± 15 lb ft).

13. Install grommet (22) to hose (6). Use hard washer (28) and bolt (25) to install clips (20) and (21) to grommet (22) and brackets (8) and (9). Tighten bolt (25) to a torque of 105 ± 20 N·m (75 ± 15 lb ft).

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Illustration 35	g03649929

14. Use two O-ring seals (19) to connect hoses (14) and (15) to each tube (10) .

15. Install grommet (16), clip (17), and clip (18) to hoses (14) and (15). Use two hard washers (21) and two bolts (27) to install the clips to C-frame. Tighten bolts (27) to a torque of 60 ± 12 N·m (45 ± 9 lb ft).

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Illustration 36	g03658072

16. Use six hard washers (28) and six bolts (29) to install guard (3), center guard (12), and guard (2) to the blocks on the bulldozer blade. Tighten bolts (29) to a torque of 105 ± 20 N·m (75 ± 15 lb ft).

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Illustration 37	g03649971
(F) Top Port (G) Bottom Port

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Illustration 38	g03658749
(A) 15°

17. Remove the covers from the manifold on the radiator guard. Use two O-ring seals (19), four flanges, eight washers, and eight bolts to connect hoses (14) and (15) to the manifold on the radiator guard. Tighten the bolts to a torque of 60 ± 12 N·m (45 ± 9 lb ft). The items that are not numbered are part of the tilt cylinder lines.

18. Check the oil in the hydraulic tank. Add oil, if necessary. Cycle the cylinders through several full strokes in both directions in order to purge air from the lines and from the cylinders. Refill the hydraulic tank to the full mark.

19. After you have completed this procedure, prepare the machine for operation. Refer to the machine Operation and Maintenance Manual for instructions.

Installation of Access/Egress Step

Table 15

Components for Step Installation
Item	Part Number	Description	Qty
1	349-6055	Plate As	2
2	8T-4956 (1)	Bolt	8
3	7X-3391 (2)	Washer	8

( 1 )	Previous models used 8T-4196 Bolt .
( 2 )	Previous models used 4H-1225 Washer .

1. Remove threaded hole plugs.

2. Chase the threaded hole.

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Illustration 39	g03243579

3. Use plate assembly (1), four bolts (2), and four washers (3) to assemble the right push arm step.

4. Repeat Step 3 for the other side of the push arm.

Installing Stable Blade Control

Necessary Parts

Table 16

434-9075 Grade Control Wiring Gp
Item	Qty	Part Number	Description
1	1	390-2881	Box Gp
2	1	434-3116	Plate As
3	1	457-1559	Harness As
4	1	5P-7466	Clip
5	1	5p-7467	Clip
6	1	5P-8112	Grommet
7	3	8T-4183	Bolt
8	3	8T-4223	Hard Washer

Table 17

390-2881 Box Gp
Item	Qty	Part Number	Description
9	1	336-9655	Sensor
10	1	392-9197	Bracket As
11	1	132-5789	Clip
12	2	5C-2890	Nut
13	2	9X-8256	Washer
14	1	7K-1181	Cable Strap
15	8	8T-4136	Bolt
16	12	8T-4121	Hard Washer
17	2	8C-3206	Half Flange
18	4	8T-4186	Bolt
19	1	392-9198	Cover
20	1	353-7956	Grommet
21	1	7K-1181	Cable Strap

Box Group Assembly

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Illustration 40	g03717161

1. Install sensor (9) to bracket assemble (10) using two washers (13) and two nuts (12). Tighten nuts to a torque of 12 ± 3 N·m (9 ± 2 lb ft).

Installing Stable Blade Control

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Illustration 41	g03746950

1. Install box group (1) using four washers (16), and four bolts (17) .

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Illustration 42	g03717188

2. Install clip (11) and secure using cable strap (14) .

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Illustration 43	g03727756

Note: Remove 439-5510 Plug As from radiator guard harness before connecting stable blade harness.

3. Connect harness assembly (3) to existing harness assembly (J) .

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Illustration 44	g03648506

4. Install clip (4), clip (5), and grommet (6) on harness assembly (3). Secure harness assembly (3) using plate assembly (2), three washers (8), and three bolts (7) .

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Illustration 45	g03652976
(H) 30°

5. When installing harness assembly (3), position harness assembly (3) to dimension (H) .

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Illustration 46	g03746952

6. Install harness assembly (3). Install two flanges (17), four bolts (18), and four washers (16). Install grommet (20) and secure using cable strap (21) .

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Illustration 47	g03746955

7. Install cover (19) using four washers (16), and four bolts (15) .

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Illustration 48	g03727779

8. Orient harness assembly (3) as shown in Illustration 48 with coupling facing towards the front of the machine. Secure harness assembly (3) to the machine using existing flanges, washers, and bolts.

9. Check the oil level in the hydraulic tank. If necessary, fill the hydraulic tank. Cycle the cylinders to full stroke in both directions in order to purge air from the lines and from the cylinders. Check the level in the hydraulic tank again. Refill the hydraulic tank to the "FULL" mark.

10. After assembly is complete, prepare the machine for operation. Refer to the Operation and Maintenance Manual for instructions.

    Note: Stable blade option must be activated using the "Display" or "Electronic Technician" for the function to work.