325, 325B and 325L Excavators Caterpillar

Final Drive - Disassemble

Usage:

Disassembly Procedure For The Final Drive On CIPI Undercarriage Arrangements Which Are Based On 325 and 325B Track Type Excavators

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	1P-2420	Transmission Repair Stand	1
B	138-7573	Link Bracket	2
C	1P-1860	Retaining Ring Pliers	1
D	6B-6682	Full Nut	1
	1P-5546	Crossblock	1
	5P-8248	Hard Washer	4
	6V-3142	Plate	1
		⁽¹⁾ Threaded Rod	1
		⁽²⁾ Spacer	4
E	138-7574	Link Bracket	2
F	8B-7561	Step Plate	1
	5F-7465	Puller Gp	1
	1H-3107	Push-Puller Tool Gp	1
	1H-3112	Bearing Cup Puller Gp	1
	1P-5551	Adjustable Screw Assembly	1

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^( 1 )	The 16 NF threaded rod is 280 mm (11 inch) long × 19 mm (0.75 inch) in diameter.
^( 2 )	The spacer's outer diameter is 64 mm (2.5 inch). The spacer's inner diameter is 25.4 mm (1.0 inch). The spacer's thickness is 6.4 mm (.25 inch).

Start By:

Remove the final drive. Refer to Disassembly and Assembly, "Final Drive - Remove" in this manual.

Thoroughly clean the outside of the final drive prior to disassembly.

Put an alignment mark across the sections of the final drive for assembly purposes. The parts must be reinstalled in the part's original locations.

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Illustration 1	g00511587

Fasten the final drive to Tool (A), as shown. The combined weight of the final drive and final drive sprocket is approximately 361 kg (795 lb).

Remove 20 bolts (1) and the washers that secure the cover to the final drive.

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Illustration 2	g00511600

Use a soft faced hammer and break the seal between cover (2) and the ring gear. Fasten Tool (B) and a hoist to cover (2), as shown. Remove the cover. The weight of the cover is approximately 32 kg (70 lb).

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Illustration 3	g00511631

Remove thrust plate (5) from the cover.

Remove 12 socket head bolts (3) and ring gear (4) from the cover.

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Illustration 4	g00511636

Remove sun gear (6). Remove carrier assembly (7) by lifting the carrier assembly straight up. The weight of the carrier assembly is approximately 14 kg (30 lb).

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Illustration 5	g00511640

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Illustration 6	g00572334

Note: Two spacers (8) are used with carrier assembly (7). One of the spacers fits on the top side of carrier assembly (7). The other spacer (8) is located in the carrier of carrier assembly (15) .

Remove spacer (8) from carrier assembly (7) .

Note: Planetary gears (11) might have oil grooves "L". Note the position of the oil grooves in relation to the carrier for assembly purposes.

Remove retaining ring (9) with Tool (C). Remove two thrust washers (10) and planetary gear (11) from the carrier. Remove bearing (12) from the planetary gear.

Repeat Step 10 in order to remove the other two planetary gears from the carrier.

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Illustration 7	g00511653

Use a screwdriver, and remove retaining ring (13) from the carrier. Remove sun gear (14) from the carrier.

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Illustration 8	g00511661

Use two people in order to remove carrier assembly (15). Remove the carrier assembly by pulling the carrier assembly straight up. The weight of the carrier assembly is approximately 25 kg (55 lb).

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Illustration 9	g00511682

Note: Spacer (16) may remain with carrier assembly (15), or the spacer may remain with carrier assembly (24). Refer to Step 19.

Remove spacer (16) from carrier assembly (15) .

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Illustration 10	g00511735

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Illustration 11	g00572352

Note: If spring pin (17) is recessed below the outside surface of the carrier, measure the depth of the spring pin and record this measurement for assembly purposes.

Drive spring pin (17) into planetary shaft (18) with a hammer and a punch.

Note: Planetary gears (20) might have oil grooves "M". Note the position of the oil grooves in relation to the carrier for assembly purposes.

Remove planetary shaft (18), two thrust washers (19) and planetary gear (20) from the carrier. Remove bearing (21) from the planetary gear. Remove spring pin (17) from planetary shaft (18) with a hammer and a punch.

Repeat Steps 15 and 16 in order to remove the other two planetary gears from the carrier.

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Illustration 12	g00511788

Use a screwdriver, and remove retaining ring (22). Remove sun gear (23) from the carrier.

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Illustration 13	g00511795
Typical example

If spacer (16) was not removed in Step 14, remove the spacer from carrier assembly (24) at this time.

Slide a piece of steel bar stock between the planetary gears in carrier assembly (24), as shown. Make sure that the bar stock is centered in the carrier assembly. Fasten a lifting sling and a hoist to the steel bar stock, as shown. Slowly lift carrier assembly (24) from the final drive. The weight of the carrier assembly is approximately 36 kg (80 lb).

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Illustration 14	g00511799
Typical example

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Illustration 15	g00572382

Note: If spring pin (25) is recessed below the outside surface of the carrier, measure the depth of the spring pin and record this measurement for assembly purposes.

Drive spring pin (25) into planetary shaft (26) with a hammer and a punch.

Note: Planetary gears (28) might have oil grooves "N". Note the position of the oil grooves in relation to the carrier for assembly purposes.

Remove planetary shaft (26), two thrust washers (27) and planetary gear (28) from the carrier. Remove two bearings (29) from the planetary gear. Drive spring pin (25) out of planetary shaft (26) with a hammer and a punch.

Repeat Steps 21 and 22 in order to remove the other planetary gears from the carrier.

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Illustration 16	g00511809

Note: It will be necessary to pry ring gear (30) away from main housing (31) in order to install the lifting slings.

Fasten lifting slings and a hoist to ring gear (30), as shown. Remove the ring gear from main housing (31). The weight of the ring gear is approximately 48 kg (105 lb).

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Illustration 17	g00511825

Remove O-ring seal (32) from main housing (31) .

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Illustration 18	g00511857
Typical example

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Illustration 19	g00511869

Remove socket head bolts (33) from gear (34) .

Use Tooling (D) to remove gear (34) from the housing.

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Illustration 20	g00511872

Remove shims (35) from the housing.

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Illustration 21	g00511882

Fasten Tool (E) and a hoist to main housing (31), as shown. Separate the main housing and the final drive sprocket from the motor housing. The combined weight of the main housing and final drive sprocket is approximately 82 kg (180 lb).

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Illustration 22	g00511906

Remove Duo-Cone seal (36) from the motor housing.

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Illustration 23	g00511934

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Illustration 24	g00511939

Remove Duo-Cone seal (37) from the main housing.

Use Tooling (F) to remove bearings (38) and (39) from the main housing.

If necessary, remove the final drive sprocket from the main housing. Refer to Disassembly and Assembly, "Final Drive Sprocket - Remove and Install" in this manual for the procedure to remove the final drive sprocket from the main housing.

Disassembly Procedure For The Final Drive On CIPI Undercarriage Arrangements Which Are Based On 325C Track Type Excavators

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Table 2
Required Tools
Tool	Part Number	Part Description	Qty
A	1P-2420	Transmission Repair Stand	1
B	138-7573	Link Bracket	2
C	1P-1863	Retaining Ring Pliers	1
D	194-3878	Spanner Socket	1
E	138-7574	Link Bracket	2
F	5F-7366	Forcing Screw	1
	1P-5546	Crossblock	1
	1U-9889	Crossblock	1
	1P-0520	Driver Group	1
	6V-7888	Puller Leg	2
	1H-3112	Puller Assembly	1
	1P-5551	Adjustable Screw Assembly	1

Start By:

Remove the final drive. Refer to Disassembly and Assembly, "Final Drive - Remove".

Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of the component should be thoroughly cleaned. This will prevent dirt from entering the internal mechanism.

Put an alignment mark across the sections of the final drive for assembly purposes. The parts must be reinstalled in the part's original locations.

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Illustration 25	g00708089

Fasten the final drive to Tooling (A), as shown. The combined weight of the final drive and final drive sprocket is approximately 312 kg (688 lb).

Remove bolts (1) and the washers that hold the cover in position.

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Illustration 26	g00708090

Remove the setscrews from the cover. Fasten Tooling (B) and a hoist to cover (2), as shown. Remove the cover. The weight of the cover is approximately 32 kg (70 lb).

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Illustration 27	g00879362

Remove twelve bolts (3). Remove gear (5). Check plate (6). Replace plate (6) if wear is shown. Remove plug (4) from cover (2) .

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Illustration 28	g00879365

Remove O-ring seal (7) from plug (4) .

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Illustration 29	g00780428

Remove gear (8). Remove spacer (9) .

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Illustration 30	g00780432

Remove retaining ring (10) with Tooling (C). Remove washer (11). Remove gear (12). Remove bearing assembly (13). Remove second washer (11) .

Repeat Step 8 for the additional two gear assemblies.

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Illustration 31	g00781401

Remove retaining ring (14) .

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Illustration 32	g00781407

Remove carrier assembly (15) .

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Illustration 33	g00781412

Remove gear (16). Remove spacer (17) .

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Illustration 34	g00781466

Remove retaining ring (18). Remove carrier (19) .

Remove carrier (19) by lifting the carrier straight up. The weight of the carrier is approximately 14 kg (30 lb).

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Illustration 35	g00879368

Disassemble carrier assembly (19), as follows.
1. Drive spring pin (20) into planetary shaft (21) with a hammer and a punch.
1. Remove planetary shaft (21) with spring pin (20) from the carrier assembly.
1. Remove spring pin (20) from planetary shaft (21) with a hammer and a punch.
1. Remove two thrust washers (22) and planetary gear (24) from the carrier assembly.
1. Remove bearing (23) from planetary gear (24) .

Repeat Steps 15.a through 15.e in order to remove the other two planetary gears from the carrier.

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Illustration 38	g00781529

Remove gear (25). Remove spacer (26) .

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Illustration 39	g00781559

Remove carrier assembly (27) .

Remove carrier assembly (27) by lifting the carrier straight up. The weight of the carrier assembly is approximately 38 kg (85 lb).
Note: It will be necessary to use an appropriate lifting device or two people to remove carrier (27) .

Disassemble carrier assembly (27), as follows.
1. Drive spring pin (29) into planetary shaft (28) with a hammer and a punch.
1. Remove planetary shaft (28) with spring pin (29) from the carrier assembly.
1. Remove spring pin (29) from planetary shaft (28) with a hammer and a punch.
1. Remove two thrust washers (30) and planetary gear (32) from the carrier assembly.
1. Remove two bearings (31) from the planetary gear.

Repeat Steps 20.a through 20.e in order to remove the other two planetary gears from the carrier.

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Illustration 43	g00781730

Remove gear (33). The weight of gear is approximately 41 kg (90 lb).
Note: Use two technicians to remove gear (33) .

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Illustration 44	g00781807

Remove O-ring seal (34) .

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Illustration 45	g00781815

Remove peening operation from stopper plate assembly (35) .
Note: Removal of the peening operation will allow stopper plate assembly to move without damage to parts.

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Illustration 46	g00781830

Install Tooling (D). Remove stopper plate assembly (35) .

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Illustration 47	g00879371

Install Tooling (E) to sprocket housing (36). Lift sprocket housing (36) and sprocket (37). Remove sprocket housing (37) from housing (38). The weight of housing (36), sprocket housing (37) and housing (38) is approximately 118 kg (260 lb).

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Illustration 48	g00781858

Remove Duo-Cone seal kit (39) from housing (38) .

Rotate sprocket housing (36) .

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Illustration 49	g00781895

Remove Duo-Cone seal kit (39) .

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Illustration 50	g00781907

Use Tooling (F) in order to remove bearings (40) and (41) from the housing.
Note: Sprocket housing (37) must be turned upside-down in order to remove bearing (41) .

If necessary, remove the final drive sprocket from the sprocket housing.
Reference: Refer to Disassembly and Assembly, "Final Drive Sprocket - Remove and Install" in this manual for the removal of the final drive sprocket from the main housing.