Usage:
Prior to Removal.
1. Drain the oil from transmission by removing the plug on the rear side at the bottom (see figure 2-3).
2. Mark the output flange and companion flange so they will always be assembled identically.
3. Disconnect the output and companion flanges.
4. Disconnect linkage, wiring, and plumbing and remove anything that would interfere with the removal of the transmission.
5. Support the rear of the engine with blocks if necessary.
6. Support the transmission with a hoist and remove the mounting capscrews.
7. Remove the 12 capscrews that secure the transmission to the engine.
8. Push the transmission away from the engine to remove the drive spider from the drive ring.
Figure 6-1 : Relationship of transmission components.
Figure 6-2. External Parts.
Figure 6-3 : Cross Section.
Unit Disassembly.
1. Remove the retaining capscrew from the end of the input shaft (see figure 6-4) and remove the retaining washer, shims and rubber ring.
Figure 6-4 : Removing or installing spider drive, retainer washer and capscrew.
Figure 6-5 : Removing spider drive.
2. Install L-type gear puller onto the drive spider (see figure 6-5), placing a protective steel disc over the input shaft and remove the drive spider.
3. Remove the four capscrews securing the hydraulic pump (see figure 6-6) to the manifold assembly and remove the pump and gasket (figure 6-7).
Figure 6-6 : Removing or installing hydraulic pump retaining capscrews.
Figure 6-7 : Hydraulic pump removed.
4. Place the unit on the front housing side. Remove the screw securing the filter cover to the manifold, and screw a 3/8-16 UNC eyebolt into the tapped hole provided on the cover to ease removal of it (see figure 6-8). Remove the filter (figure 6-9).
Figure 6-8 : Removing filter cover.
Figure 6-9 : Removing or installing filter.
5. Remove the four screws securing the PTO replacement cover to the manifold (figure 6-10). Remove the cover.
6. Remove the capscrews still securing the manifold to the rear housing (figure 6-11).
Figure 6-10 : Removing or installing PTO replacement cover.
Figure 6-11 : Removing or installing capscrews on manifold assembly.
7. Insert levers between manifold and rear housing as shown on figure 6-12 and remove the manifold from rear housing.
Figure 6-12 : Removing manifold assembly.
8. Remove the piston rings from the ends of both shafts (figure 6-13).
Figure 6-13 : Removing piston rings.
9. Turn the unit rear side down on suitable wood blocks to have the front SAE adaptor horizontal (figure 6-14).
Figure 6-14 : Installation of unit on suitable wood blocks.
10. Remove the screws securing the SAE adaptor to front housing (figure 6-15).
Figure 6-15 : Removing or installing capscrews securing SAE adaptor.
11. Remove the screws securing the front and rear housings, and using the two jacking holes provided on front housing, separate it from rear housing (figure 6-16).
Figure 6-16 : Housing split by aid of jacking holes.
12. Remove bearing outer races from front housing using an internal bearing puller, or levers (figure 6-17). Remove bearing spacers and shims. Remove input oil seal.
Figure 6-17 : Removal of outer bearing races on front half housing.
Removal Of Internal Sub-assemblies.
13. Remove the oil gauge tube from the rear housing (figure 6-18).
Figure 6-18 : Removing or installing oil gauge tube.
14. Remove the forward and reverse clutch groups, lifting them out of the housing by hand (figure 6-19).
Figure 6-19 : Removing or installing clutch groups.
15. Remove the two screws securing the oil dam to the rear housing (figure 6-20). Remove oil dam.
Figure 6-20 : Removing or installing oil dam.
16. Remove the front bearing inner race from the output shaft using an L-type puller (figure 6-21).
Figure 6-21 : Removing front bearing from output shaft.
17. Proceed as follows to remove the output gear :
a) Remove the snap ring securing the gear.
b) Install the pulling adaptor of special tool TD 300409-1 onto the gear using three pulling screws on thread holes provided in the gear. See figure 6-22.
c) Install the special tool TD 300409 onto the end of output shaft and adapt the pulling legs onto the pulling adaptor.
d) Connect a hydraulic jack of 12000 psi capacity to the press and proceed with removal of the gear; the force expected to be necessary to separate the parts is 45 tons. (See table in section 12).
| NOTICE |
|---|
Due to the force required to remove the gear from the output shaft, a protective shield should be placed around the press as a precaution. |
Figure 6-22 : Removing output gear with special tool TD-300409/1.
18. Install blocks so that the rear half housing will descend towards the output flange and allow installation of special tool TD 300409-2/3. Adapt the two puller legs onto the output gear puller plate and by aid of hydraulic ram, remove the rear bearing inner race from the output shaft. See figure 6-23.
Figure 6-23 : Removing rear inner bearing from output shaft with special tool TD-300409/2-3.
NOTE: Spacers must be used due to stroke limitations of hydraulic press TD 300409.
19. Remove output shaft and flange from rear housing.
20. Remove output oil seal from rear housing.
NOTE: Bearing inner races should only be removed from rear housing if replacement of parts is necessary.
Figure 6-24 : Housing Assembly - Front Half - Exploded View.
Figure 6-25 : Housing Assembly - Rear Half - Exploded View.
Figure 6-26 : Output Shaft - Exploded View.
Figure 6-27 : Elastic Coupling Input - Exploded View.