BobCat 753 – COOLING FAN – Gearbox/Blower Housing Removal And Installation

Put jackstands under the rear corners of the loader.

Raise the lift arms and install an approved lift arm device.
(See Installing Lift Arm Support Device on Page 10-20-1.)

Raise the operator cab. (See Raising The Operator Cab on Page 10-30-1.)

Remove the hydraulic fluid reservoir. (See Housing Removal And Installation on Page 20-70-1.)

Remove the left gas cylinder mounting bracket (Item 1) [Figure 70-60-5]. (See Gas Cylinder Removal And Installation on Page 50-20-1.)

Remove the nuts (Item 1) from the u-bolt which mounts the fan belt shield (Item 2) [Figure 70-60-6] to the blower fan.

Remove the fan belt shield (Item 2) [Figure 70-60-6] from the blower fan.

Installation: The shield must not touch the fan belt.

Torque the nuts to 15-17 ft.-lbs. (21-23 Nm).

Disconnect the breather hose (Item 1) [Figure 70-60-7] from the electrical harnesses on the loader frame.

Installation: Make sure the breather hose is unrestricted when routing.

Remove the fan drive belt (Item 2) [Figure 70-60-7] from the pulley on the blower fan.

NOTE: When checking the fan gearbox oil level, be sure the level does not go above the top of the shaft in the gearbox [Figure 70-60-8]. Use a light colored 90W gear lube if the level is low.

Remove the two mounting bolts (Item 1) and the two spacer tubes (Item 2) [Figure 70-60-9] from the blower fan.

Remove the rear mounting bolt (Item 3) [Figure 70-60-9].

Remove the front mounting bolt (Item 4) [Figure 70-60-9].

NOTE: Mounting bolts (Items 3 & 4) [Figure 70-60-9] use wave washer (Item 1) [Figure 70-60-10] to prevent tubes and bolts from falling out of the housing during installation.

Installation: Tighten the four mounting bolts to 25-28 ft.- lbs. (34-38 Nm) torque.

Lower the blower fan from the housing until it rests on the steering linkage plate [Figure 70-60-11].

Remove the strip of sealant along the top of the blower housing [Figure 70-60-12].

Installation: Use R.T.V. sealant to reseal the blower housing.

Loosen the electrical harnesses from the main frame of the loader and the blower housing.

Installation: Attach the electrical harness to the main frame. Attach the electrical harness to the blower housing with cable ties to prevent damage to the harness

Slide the blower fan and housing forward and remove both from the loader.


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