424B and 424B HD Backhoe Loaders Power Train Caterpillar


Transmission (Direct Drive) - Disassemble

Usage:

424B JRC

Disassembly Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
A  1U-5750  Engine Stand 
B  6V-2157  Link Bracket 
C  9S-9152  Puller Assembly 
C  5F-7465  Puller 
C    3/8inch x 6inch Bolt 
D  4C-3652  Spring Compressor 
E  1U-6405  Puller 
F  4C-3802  Puller 
G  8H-0663  Puller 
G  5F-7465  Puller 
H  8B-7551  Puller 
H  6V-3010  Puller 
J  137-8102  Spring Compressor 
K  4C-3089  Puller 

Start By:

  1. Remove the transmission.


NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.

Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.

Dispose of all fluids according to local regulations and mandates.


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

Note: The transmission will be disassembled in major components. The major components will then be disassembled.



    Illustration 1g00728888

  1. Install transmission (1) on Tooling (A). The weight of transmission (1) is approximately 200 kg (441 lb).


    Illustration 2g00728895

  2. Remove implement pump drive shaft (2) from transmission (1).


    Illustration 3g00728906

  3. Remove bolt (6), washer (5), and yoke (4).


    Illustration 4g00728913

  4. Attach Tooling (B) to case (7). Attach a suitable lifting device to Tooling (B). The weight of case (7) is approximately 38 kg (84 lb). Remove 14 bolts (8). Remove case (7).

(Direct Drive) Output Shaft (Front)



    Illustration 5g00728940

  1. Remove front output shaft (9).


    Illustration 6g00728943

  2. Use Tooling (C) to remove bearing cone (10).


    Illustration 7g00728944

  3. Use Tooling (E) to remove bearing cone (11) and gear (12).


    Illustration 8g00728945

  4. Remove two roller bearings (13), spacer (14), needle bearing (15), and thrust washer (16).


    Illustration 9g00728948

  5. Remove retainer (17) and clutch pack (18).


    Illustration 10g00728950


    Illustration 11g00728952

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

    Personal injury can result from being struck by parts propelled by a released spring force.

    Make sure to wear all necessary protective equipment.

    Follow the recommended procedure and use all recommended tooling to release the spring force.


  6. Use a suitable press and Tooling (D) to compress spring (19).

  7. Remove retaining ring (20), retainer (21), and spring (19).


    Illustration 12g00728953

  8. Release piston (22) by blowing shop air into the lube passage, as shown.


    Illustration 13g00729060

  9. Use a seal pick to remove the seals from piston (22).

(Direct Drive) Output Shaft (Rear)



    Illustration 14g00729062

  1. Remove screws (24) from each of the gearshift rods (23).


    Illustration 15g00729064

  2. Remove plug (25).


    Illustration 16g03652350

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

    Personal injury can result from being struck by parts propelled by a released spring force.

    Make sure to wear all necessary protective equipment.

    Follow the recommended procedure and use all recommended tooling to release the spring force.


  3. Remove plug (25), O-ring seal (26), two springs (27), and three balls (28). Remove two gearshift rods (23) from shift forks (25).


    Illustration 17g00729197

  4. Use Tooling (E) to remove bearing (30), gear (31), and gear (32).


    Illustration 18g00729198

  5. Remove bearings (33), spacer (34), and synchronizer (35).


    Illustration 19g00729199

  6. Use Tooling (F) to remove bearing (36) and gear (37). Remove synchronizer (38).


    Illustration 20g00729200

  7. Remove retaining ring (39). Remove gear (40) and housing (41).


    Illustration 21g00729201

  8. Use Tooling (E) to remove gear (42).

(Direct Drive) Shaft

  1. Remove the shaft by hand for disassembly.


    Illustration 22g00729202

  2. Use Tooling (G) to remove bearings (43) and (44).

(Direct Drive) Reverse Shaft

  1. Remove the reverse shaft by hand for disassembly.


    Illustration 23g00729204

  2. Use Tooling (G) to remove bearings (45) and (46).

(Direct Drive) Input Shaft

  1. Remove the input shaft by hand for disassembly.


    Illustration 24g00729207

  2. Use Tooling (H) to remove bearing (47).


    Illustration 25g00729208

  3. Remove retaining ring (48). Remove spacer (49), needle bearing (50), and gear (51).


    Illustration 26g00729210

  4. Remove retainer (52) and clutch pack (53).


    Illustration 27g00729213

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

    Personal injury can result from being struck by parts propelled by a released spring force.

    Make sure to wear all necessary protective equipment.

    Follow the recommended procedure and use all recommended tooling to release the spring force.


  5. Use Tooling (J) and a suitable press to compress spring (55). Remove retaining ring (54). Remove the retainer and spring (55).


    Illustration 28g00729257

  6. Release piston (56) by blowing shop air into the lube passage, as shown.


    Illustration 29g00729258

  7. Use a seal pick in order to remove the seals from piston (56).


    Illustration 30g00729260

  8. Use Tooling (K) to remove bearing (57) and gear (58).

  9. Remove gear (59) from the clutch pack.

  10. Repeat Steps 4 through 7 for the remainder of the input shaft.

Transmission Case



Illustration 31g00729262

Note: Record the measurement and placement of the shims behind the bearing cups for assembly purposes.

  1. Remove bearing cups (60), (61), (62), (63), and (64).

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