Improved Hitch Bolt Assembly Process Is Now Used on Certain 140 GC Motor Graders {7057, 7100} Caterpillar

Motor Grader

140 GC (S/N: W921,108-113,200-206,300-515)

Reference: Specifications, SENR3130, "Torque Specifications"

Reference: Operation and Maintenance Manual, M0090241, "140 GC and 140 GC AWD Motor Grader", "Prepare the Machine for Maintenance"

Description Of Change: The improved hitch bolt assembly process provides better retention to the hitch joints.

The assembly process will decrease the risk of bolt cracks and increase the service life.

Adaptable To: The following changes are adaptable to the products within the listed serial numbers, and are effective with all products after the listed serial numbers.

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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 sudden movement. Prevent possible injury by performing the following procedures before work begins: Move the product or equipment to a smooth, level surface. When applicable, lower equipment/work tools to the ground. Engage the parking brake, system brakes and/or hydraulic lockout control. When applicable, stop the engine and remove the ignition key. Release system pressure from pressurized systems. If applicable, block the wheels/tracks. Turn the battery disconnect switch to the OFF position and if applicable, remove the battery disconnect key. If not equipped with a battery disconnect switch, disconnect the battery cables from the battery and tape the battery clamps.  Attach a “Do Not Operate” or similar warning tag at the battery disconnect switch location and as defined by site rules and/or local regulations.

Illustration 1	g06276183

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Failure to use an approved access system during installation and removal of components could result in slipping and falling which could result in personal injury or death. To prevent injury or death, use an approved access system to reach the appropriate mounting locations of the components. Do not climb on the machine. Maintain three-points of contact and/or use a safety harness.

Follow the below rework procedure to install hitch bolt using the improved assembly process.

Machine Preparation

Refer to Operation and Maintenance Manual, M0090241, "140 GC and 140 GC AWD Motor Grader", "Prepare the Machine for Maintenance".

Required Parts

Table 1

Required Parts
Item	Qty	Part Number	Part Name
1	4(1)	431-4596	Shim
2	4(1)	431-4597	Shim
3	2(1)	431-4598	Shim
4	6	8T-4223	Hard Washer
5	6	8T-4194	Bolt
6	4	9X-8257	Washer
7	4	7X-2555	Bolt

(1)	Use as required.

Rework Procedure

Disassembly Procedure

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Illustration 2	g06610962
Some parts are hidden for clarity

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Illustration 3	g06611038
View of area A from Illustration 2 Bottom view of articulating hitch group (B) Bolt (C) Hard washer (D) Cover (E) Shim (F) Bolt (G) Washer

1. Remove six bolts (B), six hard washers (C), cover (D), shim (E), four bolts (F), and four washers (G). Refer to Illustration 3.

   Retain cover (D) and discard all other parts.

Assembly Procedure

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Illustration 4	g06611029
Articulating hitch group (1) 431-4596 Shim (2) 431-4597 Shim (3) 431-4598 Shim (4) 8T-4223 Hard Washer (5) 8T-4194 Bolt (6) 9X-8257 Washer (7) 7X-2555 Bolt (D) Cover

1. Install shim (1), shim (2), and shim (3). Refer to Illustration 4.

   Note: Install required number of shims to ensure that the total thickness of the shims is from 1.7 to 2.0 mm (0.07 to 0.08 inch).

2. Install cover (D) that was retained in Step 1 under Section "Disassembly Procedure". Refer to Illustration 4.

3. Install six hard washers (4), six bolts (5), four washers (6), and four bolts (7). Refer to Illustration 4.
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   Illustration 5	g06611232
   View of area A from Illustration 2 Bottom view of articulating hitch group (5) 8T-4194 Bolt (7) 7X-2555 Bolt

   1. Tighten four bolts (7) to a torque of 290 ± 20 N·m (214 ± 15 lb ft) with a torque sequence of "J"-"K"-"H"-"L"-"J"-"K"-"H"-"L". Refer to Illustration 5.

   2. Tighten six bolts (5) to a torque of 105 ± 20 N·m (77 ± 15 lb ft). Refer to Illustration 5.