Compatibility of The Bulldozer Arrangement, Rear Attachments, and Final Drive Guards of D6T Track-Type Tractors {5163, 6050, 6060, 6310, 7000, 7056} Caterpillar

Track-Type Tractor

D6 (S/N: B721-UP; AG91-UP; ES91-UP; GZ91-UP; HR91-UP; LF91-UP; RA91-UP; SA91-UP; LNC1-UP; RDC1-UP; XEC1-UP; HFE1-UP; LRG1-UP; HMH1-UP; HNK1-UP; HZL1-UP; TPL1-UP; D5M1-UP; RBP1-UP; KMT1-UP; KEW1-UP; KTW1-UP; HLY1-UP; WGY1-UP)

D6T (S/N: 2D21-UP; CR31-UP; 2B31-UP; MB51-UP; AK71-UP; MH71-UP; CG81-UP; 7C91-UP; SGA1-UP; JHB1-UP; KSB1-UP; ZEB1-UP; ZJB1-UP; JZC1-UP; SMC1-UP; DTD1-UP; JWD1-UP; LBD1-UP; RAD1-UP; LAE1-UP; STE1-UP; DJG1-UP; WCG1-UP; WFH1-UP; EJJ1-UP; LKJ1-UP; SLJ1-UP; GMK1-UP; RRK1-UP; JML1-UP; KJL1-UP; MEL1-UP; SKL1-UP; JNM1-UP; TSM1-UP; WLM1-UP; WRN1-UP; K1R1-UP; KMR1-UP; WES1-UP; GCT1-UP; HYT1-UP; SGT1-UP; JRW1-UP; RCW1-UP; RLW1-UP; LAY1-UP; NDY1-UP; TMY1-UP; HTZ1-UP; PEZ1-UP; SGZ1-UP)

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

This Special Instruction provides information on the compatibility of the bulldozer arrangements, the rear attachments, and the final drive guards of D6T and D6/D6 XE tractors. Tables containing part and group numbers are included for compatibility reference. The purpose of this document is to outline possible compatibility between D6/D6 XE (Build 20) tractors and D6T machines and contain information about possible compatibility between D6T machines. This Special Instruction includes the rework instructions for fitting the bulldozer arrangements, rear attachments, and final drive guards when possible. If more questions arise or more information is needed, submit through the Service Information Management System (SIMSi).

Safety Section

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Do not operate or work on this product unless you have read and understood the instruction and warnings in the relevant Operation and Maintenance Manuals and relevant service literature. Failure to follow the instructions or heed the warnings could result in injury or death. Proper care is your responsibility.

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Failure to follow all safety guidelines prescribed in this document and by governing authorities and regulatory agencies may result in severe injury or death of personnel or machine damage.

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When removing a major component or attachment, ensure that it is properly blocked or secured before removing mounting hardware. An assembly that is disconnected without proper blocking may shift or fall, resulting in serious injury or death of personnel or machine damage.

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Personal injury or death can result from improper maintenance procedures. To avoid injury or death, follow the procedures exactly as stated below.

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Personal injury can result from improper handling of chemicals. Make sure you use all the necessary protective equipment required to do the job. Make sure that you read and understand all directions and hazards described on the labels and material safety data sheet of any chemical that is used. Observe all safety precautions recommended by the chemical manufacturer for handling, storage, and disposal of chemicals.

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Climbing equipment may be required to access this service point. Refer to the Operation and Maintenance Manual, "Mounting and Dismounting" topic for safety information.

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Before servicing/performing maintenance on the machine, electrical power must be physically disconnected; battery plugs must be disconnected from the batteries, or the trailing cable must be unplugged, and warning tags and padlocks shall be applied by a certified electrician. Certified electricians shall perform or direct any electrical work, including any energized testing, repair work in controllers, motors, or other approved compartments, and shall insure that all compartments are properly closed and inspected prior to re-energization. All applicable lock out and tag out procedures must be followed.

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Do not operate the machine if any guards or covers are missing or inadequately secured. Personnel could be seriously injured or machine damage may occur.

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Observe the safe working load limits of all lifting and blocking devices and keep a safe distance from suspended/blocked loads. Personnel may be seriously injured or killed by falling loads.

Document Reference

Within this document, compatibility is distinguished based on when each D6T or D6/D6 XE machine was built. These designations are listed in Table 1 below along with the corresponding serial number prefixes.

The D6/D6 XE track gauge nomenclature has changed. The D6/D6 XE retain the availability of three different undercarriage offerings for both push arm and VPAT configurations. There are, however, some changes in undercarriage terminology. The term LGP will continue to be used, and the LGP identifier will continue to appear on machines. The terms XL and XW will no longer be used and will not appear on machines. The narrowest track gauge, formerly called XL, will now be considered the “Standard” configuration. Because the mid-gauge D6/D6 XE VPAT has similar ground pressure performance to the previous D6T LGP VPAT, mid-gauge D6/D6 XE tractors will use the LGP identifier, and be referred to as “ LGP 30”, regarding the 30” max track shoe width. The widest gauge D6/D6 XE configurations will also use the LGP identifier, and be referred to as “ LGP 36”, regarding the 36” shoe width. These changes are referenced in Table 2.

The following abbreviations are used in charts depicted in this publication. Reference below for definitions.

• CGC- Cat GRADE with 3D

• SU - Semi-Universal

• S - Straight

• Gp - Group

• Ar - Arrangement

• RH - Right-hand Side

• LH - Left-hand Side

Pusharms, Blades, C-Frame, Hydraulics, ETC.

D6T XL and XW blades and push arms are not compatible with D6/D6 XE blades and push arms because the track gauge has been increased by 2”.

D6T LGP pusharms are partially compatible with D6/D6 XE LGP 36” tractors. D6T LGP push arms will need to be paired with the D6T LGP blade. Also, these pusharms will need to be reworked to allow attachment of the D6/D6 XE LGP 36” tilt cylinder and the blade reworked to move the mounting points inward. The D6/D6 XE hydraulic system pressure has increased above the D6T hydraulic system pressure. If a D6T tilt cylinder is used, the cylinder will have substantially more forced exerted on the cylinder and the systems design. Installing D6T blades or pusharms to a D6/D6 XE tractor is not recommended as the blades or pusharms will experience significantly less life.

D6T VPAT C-frames and blades are not compatible with D6/D6 XE VPAT because the lift cylinders have been changed from vertical to horizontal alignment. Also, the connection method from the C-frame to the machine has been changed.

D6T XL and XW Angle arrangement C-Frame, Brace Arms, and Blade are not compatible with D6/D6 XE Angle arrangement due to the 2” increase in track gauge.

D6T LGP Angle arrangement C-frame and Brace Arms are partially compatible with D6/D6 XE LGP 36” angle arrangement tractors. The D6/D6 XE C-frame could fit on an D6T machine but would need to be paired with D6/D6 XE Brace Arms and tilt cylinders. The blade could be either a D6/D6 XE or D6T blade, but a D6T blade would need to be reworked for new lines routing. The D6/D6 XE tilt cylinders have increased tilt capability, requiring blocks on the back of the blade to be moved. D6T C-frames, Brace Arms, and tilt cylinders should not be attached to a D6/D6 XE machine due to the increase in system pressure. D6T C-frames and Brace Arms should not be fitted with D6/D6 XE tilt cylinders due to the increase in tilt capability.

Reference Tables 3 and 4 as a quick reference guide for compatibility between D6/D6 XE and D6T push arms and blades.

Bulldozer Arrangement

Tables 5, and 6 lists the bulldozer arrangement part numbers. These tables should be used with Table 7 and Tables 29 for compatibility reference.

Pusharm Group

Tables 7, and 8 lists the pusharms group numbers for Semi-Univeral and Angling blade configuration.

Blade and Edge Group

Blade and edge groups are not offered without CAT® Grade Control mounts from the factory for Build 19 and D6/D6 XE machines. Reference Tables 9,10,11, and 12 for D6/D6 XE and D6T blade and edge group part numbers for Semi-Universal, Landfill, Angle, and Semi-Universal withCAT® Grade Control mounts.

In general, D6/D6 XE and D6T blades are not compatible. A D6/D6 XE LGP 36” angle blade can be used on a D6T LGP Angle tractor but must be reworked. A D6T LGP blade must be paired with D6T push arms if used on D6/D6 XE LGP 36” tractors.

D6T blades are compatible between Build 19 and T4f machines. Build 19 machines include a plate and bosses for Stable Blade that are not included on T4f blades. T3 and T4i blade connection points are compatible with T4f and Build 19, but there have been significant structural updates. Less life is expected if a T3 or T4i blade is attached to a T4f or Build 19 machine.

Reference Tables 13,14,15, and 16 for D6/D6 XE and D6T basic blade part numbers.

Lift Cylinders, Lift Cylinders Lines, and Lift Cylinder Mounting Groups

The CAT® Grade Control lift cylinder configuration was not offered for T3 and T4i tractors. D6/D6 XE lift cylinders no longer use position sensors on lift cylinders for CAT® Grade Control so the lift cylinder part numbers do not change for tractors equipped with CAT® Grade Control. D6T VPAT lift cylinders are not compatible with D6/D6 XE VPAT lift cylinders because the cylinders have changed from vertical to horizontal orientation.

D6T VPAT tractors have different part numbers for the right and left-hand lift cylinder and lines groups while D6/D6 XE VPAT tractors now have the same part number for each side.

Reference Tables 17, 18, 19, 20,21,22,23, and 24 for Lift Cylinder and Lift Cylinder Lines Group part numbers.

Table 25 lists the lift cylinder part numbers.

Note: The increase in hydraulic system pressure for D6/D6 XE machines has resulted in a change to the lift cylinders. Using D6T lift cylinders may result in reduced life.

The lift cylinder mounting groups will be largely compatible between D6T and D6/D6 XE. The cylinder clips are the only change between Build 19 and D6/D6 XE. There are various fastener changes between T3 and Build 19 lift cylinder mounting groups, but the yoke and pin remain the same part number throughout. Tables 27, and 28 lists the lift cylinder mounting group numbers.

Bulldozer Trunnion Group

D6/D6 XE trunnions are compatible with most D6T tractors.

Note: Tables 29 shows that the D6/D6 XE LGP 36” trunnion is the same part number as the D6T XL trunnion.

Tilt Cylinder Lines Group for SU and S Blades

Tables 30 lists the tilt cylinder lines part numbers.

Tilt Cylinders for SU and S Blades

Table 31 lists the tilt cylinder part numbers.

Note: The increase in hydraulic system pressure and tilt capability for D6/D6 XE machines has resulted in a change to the tilt cylinders. Using D6T tilt cylinders will require rework and may result in reduced life.

Tilt Brace for SU and S Blades

Table 33 lists the tilt brace part numbers. Tilt braces for D6/D6 XE are not compatible with D6T tractors.

Table 34 lists the brace group numbers for angle blade configurations.

Winches

Winches are compatible between several D6T models. The winch wiring harness used in T3 and T4i machines has been changed for D6T T4f through D6/D6 XE machines. Putting a T3 winch on a T4f or Build 19 machine that is not winch ready requires more steps. The steps for installing an updated winch to both winch-ready and non-winch-ready machines are depicted in M0093717 and , M0093719. Refer to these publications for installing winches to the machines listed in Table 35 below.

When a tractor is being fitted with a winch that was not originally ordered with the machine, the winch controls and hydraulics for that specific machine build can and should be used. T3 through T4f machines has specific control and hydraulic groups depending on the inclusion of a ripper or fuel tank guards. Build 19 machines have two control and hydraulics groups depending on whether the tractor is VPAT or push arm.

D6 tractors have the option to fit both a standard PTO driven winch and a hydraulic winch. D6 tractors must be fitted with the proper controls and optional winch ready hydraulic lines, 535-7648 Winch Lines for the PA85. The mounting fasteners have been changed from standard to metric on the D6/D6 XE. To fit a D6T winch to a D6, the mounting brackets must be modified to accept metric taper lock studs and nuts or replaced with the mounting brackets for that specific machine build. For PTO driven winches, the coupling and shaft do not change from D6T to D6/D6 XE winches. Table 36 lists the winch mounting group part numbers.

D6 XE tractors are hydraulic winch ready from the factory. D6 XE tractors cannot be fitted with the PTO driven winches used on D6T machines. D6T machines are not designed for and cannot be fitted with a hydraulic winch due to the hydraulic system pressure required.

Counterweight

In general, counterweights are compatible for all D6T and D6/D6 XE tractors. The counterweight mounting fasteners have changed from standard to metric on the D6/D6 XE. To fit a D6T counterweight to a D6/D6 XE, the mounting brackets must be modified to accept metric fasteners or D6/D6 XE mounting brackets may be purchased and attached to the counterweight with the D6T counterweight pins. The pin part number is unchanged, making each counterweight compatible with both D6T and D6/D6 XE mounting brackets.

Note: Due to an updated design, D6/D6 XE tractors no longer need counterweights for balance.

Rippers

D6T rippers are not compatible with the D6/D6 XE due to the increase in hydraulic system pressure. D6T rippers have larger hydraulic cylinders, which paired with the higher system pressure would create a force much greater than the ripper cylinder design.

A D6/D6 XE ripper can be installed on a D6T machine, but the decrease system pressure may cause the ripper to operate much slower and have lesser pry-out force. This is not recommended. Also, the D6/D6 XE ripper cylinder has increased extension capability allowing a higher lift than on D6T tractors.

If a D6/D6 XE ripper is installed on a D6T, the mounting brackets must be modified to accept standard fasteners or replaced with D6T ripper mounting brackets. The pin part number is unchanged, making each ripper compatible with both D6T and D6/D6 XE mounting brackets.

The ripper used on T3 machines was unchanged until Build 19 production. The T3 ripper is compatible with T4i and T4f machines and vice versa. Build 19 introduced the high-lift ripper. The mounting brackets are the same for each D6T machine, meaning any D6T ripper can be mounted to a Build 19 machine. Build 19 high-lift rippers should not be installed on T3 through T4f machines due to the increased cylinder capability.

Striker Box

Illustration 1	g06387426

Striker boxes are compatible between T3 and T4f machines. The striker box part numbers change for Build 19 and D6/D6 XE machines, but T3 through T4f striker boxes can be fitted to Build 19 and D6/D6 XE machines with rework. The tab on 514-1248 Plate needs to be cut down according to the dotted line in Illustration 1 to be flush with the rest of the box to fit the D6/D6 XE frame. Also, mounting fasteners changed from standard to metric for D6/D6 XE tractors so the D6T striker mounting group must be reworked to accept the metric fasteners that fit the D6/D6 XE tractor case.

Illustration 2	g06387431

If a D6/D6 XE striker box is installed onto a D6T machine, there will be a gap between the striker box and the frame where this tab would be. This gap needs reworked to be sealed off by welding on a piece of plate and using a seal according to Illustration 2. The striker mounting group must be reworked to accept the standard fasteners that fit the D6T tractor case.

Drawbar

D6/D6 XE drawbars have changed from standard to metric fasteners. The drawbar must be adapted to fit the mounting holes on the tractor case. Also, no short drawbar configuration will be offered at D6/D6 XE first production.

Final Drive Guard

Seal-type guards are compatible from D6T machines. Seal-type guards cannot be used on D6/D6 XE machines due to design changes in the final drives. Reference Table 41.

Clamshell guards are compatible from T4i to Build 19 machines. Clamshell guards cannot be used on D6/D6 XE machines due to design changes in the final drives. Reference Table 42.

Labyrinth style guards are compatible for T4f through D6/D6 XE machines. Reference Table 43.

Table 44 should be used as a quick reference guide for what types of final drive guards are offered for each generation of tractor.