525D, 535D, 545D, 555D Wheel Skidder Grapple Snubber - Inspect/Adjust Caterpillar


Grapple Snubber - Inspect/Adjust
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525D, 535D, 545D, 555D Wheel Skidder [SEBU8540]
WORK TOOLS
GRAPPLE GP
525D, 535D, 545D, 555D Wheel Skidder Grapple Snubber - Inspect/Adjust
1.1. Installation Procedure
2.2. Upper Joint Assembly
3.2. Lower Joint Assembly

------ WARNING! ------

If the swing dampener (snubber) is not properly tightened, the grapple can swing freely. This could cause personal injury to nearby personnel.

Make sure that the area around the grapple is clear of personnel before you check the swing dampener (snubber).

----------------------

In order to achieve the longest life of the components for the snubber, the operation of the snubber should be monitored constantly. The adjustment should be tight enough to avoid damaging contact with the arch or the boom while the grapple arms (tongs) are empty.




Illustration 1g00956113



Illustration 2g00956038

View A-A

Upper Joint Assembly

(1) Bolt

(2) Cap

(3) Shims

(4) Reaction plate

(5) Friction plate




Illustration 3g00956037

View B-B

Lower Joint Assembly

(1) Bolt

(2) Cap

(3) Shims

(4) Reaction plate

(5) Friction plate

The amount of drag of the snubber is set with shims (3). In order to increase the drag of the snubber, remove shims. In order to decrease drag of the snubber, add shims.

  1. To adjust the snubber, loosen bolts (1) from cap (2) .

    Note: Each shim goes halfway around cap (2). Therefore, the shims are removed in pairs. The machine is shipped with 5 shim thicknesses.

  1. Add or remove shims until the desired swing of the grapple is achieved.

    Use the shims, as needed.

    (3) 203-3956 Shim ... 1.21 mm (.048 inch)

  1. Replace the reaction plates and the friction plates if the drag of the snubber is not high enough.

Installation Procedure

Upper Joint Assembly




    Illustration 4g00956218

    (6) 204-9606 Shim

    (7) 204-9607 Shim

    (8) Pin




    Illustration 5g00956219

    View A-A

    (1) Bolt

    (2) Cap

    (3) 203-3956 Shim

    (4) Reaction plate

    (5) Friction plate

    (9) O-ring seal

    (10) Bushing

    (11) Lip seal

    (12) Pin

    (13) Spring

    (14) Retaining ring

    (15) Bushing

  1. Install one reaction plate (4) and one friction plate (5) .

    Note: All friction plates should be dipped in 8T-9579 Oil for five minutes before assembly.

    Note: A total of five friction plates are required for proper operation.

  1. Insert the pin (12) with retaining ring (14) until the retaining ring touches the first friction plate (5) .

  1. Install the rest of the parts.

    Note: Install cap (2) with the reversed grease zerk at the top.

  1. Retract the pin (8) far enough in order to slide shims (6,7) between the lug edge and the clevis end. Insert the shims and assemble pin (8) .

    Use the shims, as needed.

    (6) 204-9606 Shim ... 2.29 mm (.090 inch) (7) 204-9607 Shim ... 1.52 mm (.060 inch)

  1. Apply 5P-0960 Molybdenum Grease on the bearings and the clutch housing through the grease fittings that are on the bearing. Apply the grease to the clutch housing until grease comes out of the reversed grease zerk.

  1. Repeat Step 5 again after one hour of operation after the initial fill.

Lower Joint Assembly




Illustration 6g00956278



Illustration 7g00992715

View B-B

(1) Bolt

(2) Cap

(3) 203-3956 Shim

(4) Reaction plate

(5) Friction plate

(6) 204-9606 Shim

(7) 204-9607 Shim

(8) Pin

(9) O-ring seal

(10) Bushing

(11) Lip seal

(12) Pin

(13) Spring

(14) Retaining ring

  1. Install pin (8) .

  1. Install one reaction plate (4) and one friction plate (5) .

    Note: All friction plates should be dipped in 8T-9579 Oil for five minutes before assembly.

    Note: A total of five friction plates are required for proper operation.

  1. Insert the pin (12) with retaining ring (14) to the back of the clutch housing.

  1. Insert shims (6,7) at the back of the clutch housing lug and pass pin (12) through the shims until retaining ring (14) touches the first friction plate (5) .

    Use the shims, as needed.

    (6) 204-9606 Shim ... 2.29 mm (.090 inch) (7) 204-9607 Shim ... 1.52 mm (.060 inch)

  1. Install the rest of the parts.

    Note: Install cap (2) with the reversed grease zerk at the top.

  1. Apply 5P-0960 Molybdenum Grease on the bearings and the clutch housing through the grease fittings that are on the bearing. Apply the grease to the clutch housing until grease comes out of the reversed grease zerk.

  1. Repeat Step 6 again after one hour of operation after the initial fill.

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