BobCat 753 – COOLING FAN – Gearbox Disassembly

NOTE: When repairing the gearbox order the following as needed.

1. Complete Assembly
2. Long Housing Assembly
3. Long Housing
4. Short Housing Assembly (See Note Below)
5. Internal Parts

NOTE: The short housing is only available as an assembly. (See Gearbox Parts Identification on Page 70-60-6.) (Order parts from Bobcat Parts Sales.)

NOTE: Be sure to count the number and thickness of shims during disassembly. Install the shims in the original location during assembly.

NOTE: Always replace seals during assembly.
Replace the parts in the gearbox as needed.

Remove the fan and blower housing mounting plate. (See Gearbox/Blower Housing Removal And Installation on Page 70-60-2.)

Long Housing

Loosen the set screws (Item 1) and remove the pulley (Item 2) [Figure 70-60-18].

Remove the long key (Item 3) [Figure 70-60-18].

Remove the four mounting bolts and the part number tag [Figure 70-60-19].

Remove the oil from the gearbox.

Drill an 1/8 inch (3 mm) hole in the seal. Use a slide hammer tool to remove the seal [Figure 70-60-20].

Remove the small snap ring [Figure 70-60-21].

Remove the small shims [Figure 70-60-22].

Remove the screw and washer from the shaft [Figure 70-60-23].

Support the lower flange and press the shaft from the bearing [Figure 70-60-24].

NOTE: The gear and the other bearing (pulley end) will be removed with the shaft.

Support the bearing and press the shaft from the bearing [Figure 70-60-25].

Short Housing

Remove the end cap [Figure 70-60-26].

Use care not to damage the housing.

Drill an 1/8 inch (3 mm) hole in the seal. Use a slide hammer tool to remove the seal [Figure 70-60-27].

Remove the large snap ring from the flange end of the housing [Figure 70-60-28].

Remove the large shims from the housing [Figure 70-60-29].

NOTE: Use the same size and thickness of shims during assembly.

Remove the screw and washer (Item 1) [Figure 70-60-30] from the shaft.

Remove the snap ring from the cap end of the housing [Figure 70-60-31].

Press the shaft from the housing [Figure 70-60-32].

NOTE: Both bearings may come out of the housing with the shaft. If one bearing remains in the housing use a non metal object to tap the bearing from the housing.

Press the bearing from the tapered end of the shaft [Figure 70-60-33].

Press the bearing, shims and gear from the shaft [Figure 70-60-34].

Remove the key from the shaft [Figure 70-60-35].