BobCat 753 – HYDROSTATIC MOTOR – Carrier Assembly

Put the motor carrier housing in the press as shown [Figure 30-20-65].

Use 4-5/16 inch driver tool and press the new inner bearing race into the motor carrier housing [Figure 30-20-65].

Press the bearing race in until it is fully seated in the carrier housing.

Turn the motor carrier housing over as shown [Figure 30-20-66].

Use 4-5/16 inch driver tool and press the new outer bearing race into the motor carrier housing [Figure 30-20-66].

Press the bearing race in until it is fully seated in the carrier housing.

Use the fabricated press tool (Item 1) and 3.0 inch driver tool, install the new inner bearing (Item 2) [Figure 30-20-
67] on the sprocket shaft as shown.

Remove the press and drive tools from the sprocket shaft.

Put the motor carrier housing (Item 1) [Figure 30-20-68] over the sprocket shaft as shown.

Put the outer bearing over the end of the sprocket shaft and press the bearing on with the press tool and driver
tool [Figure 30-20-68].

Remove the press and driver tools from the sprocket shaft.

Put the snap ring (Item 1) [Figure 30-20-69] over the end of the sprocket shaft.

NOTE: Use the snap ring pliers to spread the snap ring so it will fit over the sprocket shaft.

Using the press and driver tools, press the snap ring (Item 1) [Figure 30-20-69] over the sprocket.

Press the snap ring on until it snaps into the groove on the shaft.

Put a new shaft seal (Item 1) [Figure 30-20-70] on the sprocket shaft.

Use MEL1420 Carrier Seal Tool (Item 1) [Figure 30-20-71] and install the shaft seal.

Hit the tool with a hammer until the seal is fully seated on the carrier shaft [Figure 30-20-71].

Refer to Carrier Shaft Seal Replacement on Page 30-20-15 for complete shaft seal installation procedure.

Check the end play of the motor carrier as follows:

Use a rubber mallet [Figure 30-20-72], tap down on the cluster shaft.

Install a dial indicator as shown in Photo [Figure 30-20-73].

Use a pry bar (Item 1) [Figure 30-20-73] to lift the carrier shaft and read the end play on the dial indicator.

The carrier shaft must turn freely with end play not to exceed 0.007 inch (0,17 mm).

 

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