Installation of the Variable Pitch, Angle, and Tilt Blade on a D6T Track-Type Tractor{6052, 6060, 6701} Caterpillar

Installation of the Variable Pitch, Angle, and Tilt Blade on a D6T Track-Type Tractor{6052, 6060, 6701}

Usage:

Track-Type Tractor:: D6T (S/N: KSB1-UP; JZC1-UP; DTD1-UP; EJJ1-UP; RRK1-UP; RCW1-UP)

Introduction

This Special Instruction provides the installation procedure for the Variable Pitch, Angle, and Tilt Blade on D6T LGP, D6T XW, and D6T XL machines.

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

Note: Do not perform any procedure in this Special Instruction until you read the information and you understand the information.

ReferenceService Manual, Parts Book, and Operation and Maintenance Manual

ReferenceRefer to Specifications, SENR3130, "Torque Specifications" or the topic "Torque Specifications" in the Operation and Maintenance Manual of your machine for additional information.

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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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NOTICE

Do not allow any dirt or foreign material to get into the hydraulic system during assembly, connection of lines, when components are filled with fluid, or during any maintenance operation.

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NOTICE

Maintain the oil in the hydraulic system at the correct level to prevent pump cavitation.

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NOTICE

Clean all surfaces and remove burrs from all areas where parts are to be installed. Chase all tapped holes used for mounting purposes.

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NOTICE

When a hoist is used to lift any part or assembly, stand clear of the area. Always make sure that the hoist has the correct capacity. Approximate weights of the components are shown in Table 1

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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: Do not coat any fasteners with oil or with grease prior to tightening. Instructions are given when lubrication is required.

Note: The variable pitch, angle, and tilt blade is installed on a D6T LGP, a D6T XW, or a D6T XL machine. The C-frame is already installed when the machine is delivered.

Approximate Weights

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Table 1
Weights for Specified Components of the Variable Pitch, Angle, and Tilt Bulldozer
Part Number	Description	Weight
312-7770	Blade and Edge Group	1782 kg (3929 lb)
227-8893	Tilt Cylinder	82 kg (180 lb)
344-5133	Angle Cylinder	73 kg (161 lb)

Necessary Parts

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Table 2
Variable Pitch, Angle, and Tilt Blades
Item	Part Number	Machine Serial Number Prefix	Qty
1	311-7887	(S/N: KSB1-1124; EJJ1-299)	1
	312-7770 ⁽¹⁾	(S/N: RCW1-UP; RRK1-UP; KSB1125-UP; EJJ300-UP)	1
	334-1788 ⁽²⁾	(S/N: DTD1-UP; JZC1-UP)	1

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^( 1 )	Use this component for D6T XW and LGP machines.
^( 2 )	Use this component for D6T XL machines.

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Table 3
Parts Required for VPAT Installations XL, XW, and LGP
Item	Part Number	Description	Qty
2	344-5133	Angle Cylinder	2
3	3B-8489	Grease Fitting	1
4	104-4817	Pin	2
5	229-1516	Spacer	2
6	223-3279	Retainer	2
7	8T-4123	Washer	2
8	8T-6430	Bolt M20X2.5	2
9	227-8893	Tilt Cylinder	1
10	148-8354	Elbow As.	1
11	319-6218	Elbow As.	1
12	334-1842	Hose As.	1
13	334-1843	Hose As.	1
14	8T-4195	Bolt M10X1.5	4
15	8T-4121	Washer	8
16	3G-8047	Grommet	3
17	3G-8054	Clip	3
18	3G-8057	Clip	3
19	8T-4133	Nut	2
20	8T-4186	Bolt M10X1.5	2
21	238-5040	Guard	1
22	8T-4139	Bolt M12X1.75	2
23	8T-4223	Washer	6
24	7X-2577	Bolt M24x3	8
25	8T-4167	Washer	8
26	214-2295	Bearing Cap	2
27	9J-4782	Protector	1
28	245-1168	Pin	4
29	226-7191	Retainer	2
30	7X-0515	Washer	3
31	8T-7338	Bolt	4
32	226-7192	Spacer	4
33	279-6640	Pad	4
34	089-8249	Spacer	2
35	214-2286	Shim	8
36	292-6035	Retainer Pin	2
37	9X-8257	Washer	1
38	313-9790	Spacer	4
39	381-1880	Link Gp-Pitch	1
40	148-8340	Connector As.	2
41	148-8364	Elbow As.	2
42	334-1930	Mounting Group (AccuGrade)	1
43	8T-4183	Bolt M12X1.75	4

Machine Preparation

Procedure for Retracting Both Angle Cylinders

This procedure is only used if one of the angle cylinders is not fully retracted.

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Illustration 1	g02334058

Fully retract one angle cylinder (2) .

Attach a suitable lifting device to the angle cylinder. Remove lines guard (B), shipment strap (A), bolts, and washers from that cylinder.

Secure the cylinder in order to prevent movement.

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Illustration 2	g02334060

Disconnect and cap the hydraulic hoses (C) from the head end and the rod end of the cylinder.

Retract the opposite cylinder.

Replace hoses, lines guard, shipment strap, bolts, and washers.

Preparation of the Blade and the Joint

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Illustration 3	g02334285

Attach lube fitting (3) to the blade.

Thoroughly clean the surface of trunnion bearing (D). Remove any paint and debris from the surface of the trunnion bearing. Do not apply grease to the trunnion bearing at this time.

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Illustration 4	g02334289

Thoroughly clean the surface of trunnion ball (E). Remove any paint and debris. Do not apply grease to the trunnion ball.

Procedure for Connecting Both Angle Cylinders

This procedure is used on a machine the first time that the blade is attached to the machine. The machines are shipped from the factory with the lines to the angle cylinders disconnected.

Release the pressure in the implements before connecting the hoses. Turn the key to the ON position. Move the implement control lever to all of the positions in order to release any pressure.

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Illustration 5	g02334058

Attach a suitable lifting device to the angle cylinder. Remove shipment strap (A) securing right angle cylinder (2). Remove cover (B). Save shipment strap (A) .

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Illustration 6	g02334063

Remove caps from cylinders (2) and plugs from hoses (F) and (G). Connect the short hose to fitting (41) and connect the long hose to fitting (40).
Note: Make sure that the long hose is on the inside of the short hose on the left side of machine. Make sure that the long hose is on the outside of the short hose on the right side of the machine.
Note: Some oil may drain from the hoses. Use a suitable container to catch the oil.

Install cover (B) .

Repeat Step 2 through Step 4 for the opposite side of the machine.

Procedure for the Tilt Cylinder and the Lines Group

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Illustration 7	g02334077

Attach a suitable lifting device to the tilt cylinder. Use a pin (4) and two spacers (5) in order to attach the head end of tilt cylinder (9) to the frame. Apply anti-seize compound to pin (4) and install from the bottom of the joint.

Use retainer (6), washer (7), and bolt (8) in order to secure pin (4) .

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Illustration 8	g02334078

Install elbow assembly (10) and (11). Position both elbow assemblies with the same orientation as shown in the Illustration 8.

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Illustration 9	g02334097

Remove front tilt tube guard (H), bolts, and washers from the frame. Remove caps from the tubes.

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Illustration 10	g02334677

Connect hose (12) from the rod end of the tilt cylinder to the outside tube assembly. Connect hose (13) from the head end of the tilt cylinder to the inside tube assembly.

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Illustration 11	g02334097

Replace front tilt tube guard (H), the bolts, and the washers. Ensure that the hoses do not contact the front tilt tube guard.

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Illustration 12	g02334079

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Illustration 13	g02334080

Connect hose (12) to connector (10) that is located at the rod end of tilt cylinder (9). Refer to Illustration 12 for the orientation of the connector that is on the hose. Connect hose (13) to elbow assembly (11) that is located at the head end of tilt cylinder (9). Refer to illustration 13 for the orientation of the connector that is on the hose.

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Illustration 14	g02334823

Secure the hoses with clip (17) and clip (18) use two bolts (14), and two washers (15) to attach grommet (16). The hose guarding is split to facilitate the installation of the clamp.

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Illustration 15	g02334878

Secure the hoses with clip (17) and clip (18) use two bolts (20), four washers (15), and two nuts (19) to attach grommet (16) .

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Illustration 16	g02334936

Secure the hoses with clip (17) and clip (18) use two bolts (14), and two washers (15) to attach grommet (16). The hose guarding is split to facilitate the installation of the clamp.

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Illustration 17	g02334958

Position guard (21) on tilt cylinder (9) and install two bolts (22) with washers (23) .

Procedure for Mounting the Blade Group on the Machine

Use an appropriate lifting device in order to raise blade (1) to an upright position. The blade must be in the upright position for this procedure. Refer to Table 1 for the approximate weights of the components.

Secure blade (1) with an appropriate support device. Use an appropriate lifting device or use blocks to stabilize blade (1) in the upright position.
Note: A block that is under the trunnion bearing must be 6 inches tall. The block should nearly contact the trunnion bearing to the blade weld.

Before the installation of the shims, preassemble the trunnion assembly without the shims. Use an appropriate lifting device in order to maneuver the blade.
Note: Do not apply a load to the blade with the machine while the blade is being supported by a hoist. Damage to the blade may result.

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Illustration 18	g02335761

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The blade can move or fall when the mounting pins are removed.

To prevent bodily injury, block the blade or support the blade with a hoist. Keep all personnel away from the blade.

Lift the blade with an appropriate lifting device. Move trunnion bearing (D) to trunnion ball (E) on the C-frame.

Mount trunnion bearing (D) onto trunnion ball (E) .

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Illustration 19	g02335764

Install the upper split ring (26). Install four washers (25) and bolts (24) in split ring (5). Install the lower split ring (26). Install four washers (25) and bolts (24) in split ring (26). Full torque is not required at this time. When you are installing the split ring, ensure that there is an even gap (K) between each bearing cap (26) and bearing (D) .

Measure dimension (K) between the surface of the trunnion bearing and the split ring.

Remove eight bolts (24) and eight washers (25). Remove both split rings (26) .

Use an appropriate lifting device in order to back off the blade so that the trunnion bearing is no longer mounted on the trunnion ball.

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Illustration 20	g02335766

Apply grease to the inside of trunnion bearing (D). Apply grease to both interior surfaces of two-piece split ring (26) .

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Illustration 21	g02337256

Install shims (35). Add one shim more than dimension (K). See Step 7 and Illustration 19. Install the upper split ring (26) with four washers (25) and four bolts (24). Do not tighten at this time.

Lift the blade with an appropriate lifting device. Move trunnion bearing (D) to trunnion ball (E) on the C-frame.
Note: If necessary, further loosen one bolt or more in order to maneuver the trunnion bearing onto the trunnion ball. Adjust the tightness of bolts (24), as needed. If necessary, remove the two outer bolts in order to facilitate the mounting of the trunnion bearing.

Mount trunnion bearing (D) onto trunnion ball (E) .

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Illustration 22	g02335768

Install shims (35). Add one shim more than dimension (K). See Step 7 and Illustration 19. Install the lower split ring (26) with four washers (25) and four bolts (24). Tighten the bolts to a torque of 800 ± 100 N·m (590.0 ± 75.00 lb ft).

Test for proper shimming by manually moving the blade assembly. The blade should move without difficulty, binding, or play.

Grease fitting (3). After the fitting has been greased install protector (27) on fitting (3) .

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Illustration 23	g02850203

Position the link assembly (39) on the blade.

Use pin (28), and two spacers (38) in order to connect the link assembly.

Apply anti-seize compound to pin (28) before assembly.

Use retainer (6), washer (37), and bolt (31) in order to secure pin (28) .

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Illustration 24	g02850217

Position the link assembly (39) on the C-frame.

Repeat Step 18 through Step 20 in order to attach the link assembly to the frame.

Place blocks under the corners of the blade. Disconnect the hoist from the blade.

Lower the blade onto the blocks.

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Illustration 25	g02850219

Set the length of the pitch link for job conditions.

Remove cotter pin and washer (L) from pin (M) .

Remove pin (M) .

Use wrench (N) to turn the turn buckle.

While facing the left-hand end of the link, rotate the turn buckle sleeve counterclockwise in order to shorten the link. This adjustment is used for fine grading or soft material conditions. The cutting edge angle will be approximately 53.5 degrees. Rotate the turn buckle sleeve clockwise in order to extend the link for tougher material conditions. The cutting edge angle will be approximately 59.5 degrees. Use the slot in the wrench assembly to gage the pitch link setting.

Grease the four grease fittings that are on the pitch link assembly. After the fittings have been greased install protectors (27) on all four of the grease fittings.

Replace the wrench (N), the guard, and pin (M). Secure with cotter pin and washer (L) .

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Illustration 26	g02335782

Attach a suitable lifting device to the right angle cylinder (2). Position the right angle cylinder (2) on the blade.

Use pin (28), two spacers (32), and two pads (33) in order to attach the right angle cylinder (2) to the blade. Apply anti-seize compound to pin (28) and install from the bottom of the joint.

Use retainer (29), washer (30), and bolt (31) in order to secure pin (28) .

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Illustration 27	g02859416

Use an appropriate lifting device in order to position the tilt cylinder (9) on the blade.

Use pin (4) and two spacers (34) in order to attach the rod end of tilt cylinder (9) to the blade. Apply anti-seize compound to pin (4) and install from the top of the joint.

Use retainer (6), washer (7), and bolt (8) in order to secure pin (4) .

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Illustration 28	g02335784

Attach a suitable lifting device to the left angle cylinder (2). Position the left angle cylinder (2) on the blade.

Use pin (28), two spacers (32), and two pads (33) in order to attach the rod end of left angle cylinder (2) to the blade. Apply anti-seize compound to pin (28) and install from the bottom of the joint.

Use retainer (29), washer (30), and bolt (31) in order to secure pin (28) .

Check the oil level in the hydraulic tank. If necessary, fill the hydraulic tank. Start the engine. Cycle all of the cylinders to full stroke in both directions in order to purge air from the lines and from the cylinders. Stop the engine. Check the level in the hydraulic tank again. Refill the hydraulic tank to the FULL mark. Check for leaks.