992G Wheel Loader Machine Systems Bucket - Install Caterpillar


Bucket - Install
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1.1. Break-In Procedure
2.1. Installation Procedure

Break-In Procedure

The inner bores of the bearings are coated with a black crystalline material that aids in the process for break-in between the pin and the bearing. The bearings should be replaced if a pin is replaced. The bearings can be replaced without replacing the pin if the pin is in good condition.

The pin and the bearing should be replaced if galling or metal pickup are present on either component.

The pin and the bearing should be replaced when wear has reduced the diameter of the pin by 3 mm (0.12 inch).

  1. All joints should be filled with grease as part of the normal installation procedure of the pin.

  1. Place the bucket in the fully lowered position. Move the engine throttle to half speed. Completely raise the bucket. Place the bucket in the "TILT" position until the bucket is all the way back. Now move the bucket to the "DUMP" position. Lower the bucket to the ground. Apply enough down pressure to the bucket in order to raise the front tires off the ground.

  1. Add grease to all the joints until a steady stream of grease exits the relief fittings or the face seals.

  1. With the bucket empty, slowly cycle the lift linkage for four complete cycles. Lower the bucket to the ground. Apply down pressure to the bucket until the machine front tires lift off the ground. Add grease to the joints until a steady stream of grease exits the relief fittings or the face seals.

  1. Fill the bucket half full and slowly raise the bucket to the highest position. Return the bucket to the ground and apply slight down pressure. Repeat this procedure five times. Do not operate for 30 seconds between each of the five cycles. Add grease until a steady stream of grease exits the relief fittings or the face seals.

  1. Repeat 5 with a full bucket.

  1. Listen for any noise from the pins during the break in procedure. Inspect the pins after the break in procedure to make sure that grease is only exiting from the relief fittings or the lip seals.

Installation Procedure




Illustration 1g00686497

Note: Alignment of the pin joints is an important factor. The pins that are used in the pin joints are a slip fit. It is important to relieve the pin joint pressure from the pin joints that are being serviced. It is important to park the machine on a surface that is flat and level. Use the implement hydraulics, hoists, or suitable lifting devices in order to relieve the pin joint pressure. Use Illustration 1 for the pins and the pin joints that are referenced in this procedure.

Note: Using the correct seal installation tools is the preferred method for assembling the seal assembly and for installing the seal assembly. Refer to Disassembly and Assembly, "Maintenance Free Linkage Seals - Install" for the correct procedure.




Illustration 2g00937918

Table 1
Item     Part Number     Quantity     Description    
1     3J-1907     3     O-Ring Seal    
-     9S-4191     2     Plug    
-     3Y-2888     1     Connector    
-     1K-6853     1     Grease Fitting    
2     143-9740     4     Seal    
3     159-2960     2     Collar    
4     228-9569     1     Pin As    
5     204-3582     1     Plate As    
6     146-1799     1     Hard Washer    
7     147-2383     1     Spacer    
8     8T-1605     1     Bolt    
9     6V-5103     1     O-Ring Seal    
10     8T-4167     4     Hard Washer    
11     8T-5878     4     Bolt    
12     196-7313     1     Retainer Plate    
13     205-5153     2     Bearing    
14     204-6656     1     Spacer    



    Illustration 3g00683351

  1. Thoroughly clean the four collar bores in the bucket. Apply 5P-3931 Anti-Seize Compound to the collar bores of the bucket prior to the installation of the collars.

    Note: The outside diameter of the collar is a slip fit in the bore for the B-pin.

  1. Install the collar and maintenance free linkage seals (18) in the right side B-pin bore of the bucket. Install the collar and maintenance free linkage seals as a unit in the right side of the bucket B-pin bore. DO NOT install a collar assembly in the left side of the bucket at this time.

    Note: The collar should extend outward from the B-pin bore by 13 mm (0.5 inch). This allows clearance for the installation of the bucket without damaging the inner seal assemblies of the collar assemblies.




    Illustration 4g00683292

    Note: The outside diameter of the collar is a slip fit in the C-pin bore.

  1. Install collar (17) in the right side of the bucket C-pin bore. DO NOT install a collar assembly in the left side of the bucket at this time.

    Note: The collar assemblies should extend outward from the pin bores by 3 mm (0.12 inch). This allows clearance for the installation of the bucket link.

  1. Apply 8T-9582 Oil (SAE 80W90) to the bearing bores of the bucket link and of the boom.

    Note: To prevent damage to the tilt cylinder, make sure that the tilt cylinder is fully retracted before the boom is raised.




    Illustration 5g00318812

  1. Raise the boom off the ground by approximately 457 mm (18 inch). Place a stand or blocking under the boom in order to keep the boom raised.

  1. Fasten a hoist and suitable lifting chains to the bucket. The weight of the bucket is 9940 kg (21900 lb). Lift the bucket into position and align the B-pin bores with the B-pin bearing bores.

    Note: Make sure that the bucket remains suspended until the B-pin is completely installed.




    Illustration 6g00683813

  1. Lubricate B-pin (14) with 8T-9582 Oil (SAE 80W90). Use a hoist and a suitable lifting sling to install B-pin (14) . The weight of B-pin (14) is 209 kg (460 lb).

    Note: B-pin (14) is a slip fit in the bores. Proper alignment is important. Do not use excessive force to install B-pin (14) .




    Illustration 7g00683288

  1. Make sure that the end of B-pin (14) is positioned in the slot on the bucket. Install plate (16) and four bolts (15) .



    Illustration 8g00683287

  1. Install the collar and maintenance free linkage seals (18) in the left side B-pin bore of the bucket. Refer to Step 2.

  1. Install O-ring seal (13) in the groove on the opposite end of B-pin (14) .



    Illustration 9g00683284

  1. Align the dowels in plate (11) with the holes in the end of the B-pin. The two fill ports in plate (11) should be located on the upper portion of the B-pin diameter.

  1. Install the spacer, the washer, and bolt (10) in order to secure plate (11) to the B-pin.

  1. Use Tooling (D) to tighten bolt (10) . The torque for bolt (10) is 2700 ± 300 N·m (1985 ± 220 lb ft).



    Illustration 10g00319323

  1. Use a hoist and a suitable lifting chain to lift bucket link (1) into position.

    Note: The weight of the bucket link in a standard lift arrangement is 1235 kg (2720 lb). The weight of the bucket link in a high lift arrangement is 1340 kg (2955 lb).

    Note: Do not remove the hoist and the lifting chain until the C-pin is installed.

  1. Install Tooling (A) so that Tooling (A) is supporting bucket link (1) .



    Illustration 11g00683798

  1. Lubricate C-pin (5) with 8T-9582 Oil (SAE 80W90). Use Tooling (A) to align the bores.

    Note: C-pin (5) is a slip fit in the bores. Proper alignment is important. Do not use excessive force to install C-pin (5) .

  1. Use a hoist and a suitable lifting sling to carefully install C-pin (5) . The weight of C-pin (5) is 209 kg (460 lb).



    Illustration 12g00683277

  1. Make sure that the end of C-pin (5) is positioned in the slot on the bucket. Install plate (7) and four bolts (6) .



    Illustration 13g00317724

  1. Install the collar and maintenance free linkage seals (18) in the left side C-pin bore of the bucket. Refer to Step 3.

  1. Align the dowels in plate (3) with the holes in the end of the C-pin.

  1. Install the spacer, the washer, and bolt (2) in order to secure plate (3) to the C-pin.

  1. Use Tooling (D) to tighten bolt (2) . The torque for bolt (2) is 2700 ± 300 N·m (1985 ± 220 lb ft).

  1. Remove Tooling (A) , the hoist, and the lifting sling.



    Illustration 14g00699027

  1. Use the following procedure to test maintenance free linkage seals for correct assembly:

    1. Install Tooling (C) to the top fill port of the B-pin joint.

    1. Apply 689 kPa (100 psi) of air pressure to the top fill port of the B-pin joint.

    1. Monitor the pressure for ten minutes.

    1. The pressure should not drop more than 69 kPa (10 psi) if the B-pin joint is assembled correctly.



    Illustration 15g00683282

  1. Install cover (9) and nine bolts (8) on both sides of the bucket.

End By: Separate the steering frame lock. Refer to Disassembly and Assembly, "Steering Frame Lock - Separate and Connect".

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