Head shaft sprockets .................................................... 5

____________________________________ Replacement of wear parts

 Remove the four (4) nuts, bolts, and lock washers from each of the head shaft bearings. Note that there may be bearing shims under the bearing. If shims are present, make note of their thichness, quantity and location.

 Attach an appropriate lifting device to the head shaft and slide out towards the rear of the frame.

WARNING! You could be seriously injured or even killed by falling loads. Observe the safe working load limits of lifting or blocking devices and keep a safe distance from suspended loads.

How to install the head shaft

To install the head shaft assembly proceed as follows (Fig. 80):

 Attach an appropriate lifting device to the head shaft and slide in the slots located at the end of the feeder breaker. The gear reducer may be installed on shaft and installed into feeder if the feeder frame is equipped with an access notch.

 Reinstall bearing shims, if applicable, back into the same location as they were removed from. Make sure to install the shims of the same thickness and quantity.

 Align the head shaft bearings with the mounting holes in frame and secure each with the four (4) nuts, bolts, and lock washers. Torque bolts to 645 ft-lbs.

WARNING! The headshaft must turn freely by hand. If the headshaft does not turn freely by hand, the bearings will fail prematurely.

 Install the left and right sprocket guards, head shaft filler plates, tailpiece hoppers, amd tailpiece tilt cylinders.

 Connect the central lubrication hoses on both head shaft bearings.

 Install the hydraulic motor onto the input shaft of the gear reducer.

 Install the five 1/2”X 2 1/4”hex head mouting bolts, lock washers, and flat washers and torque to 104 ft-lbs.

 Reconnect hydraulic hoses.

 Install the conveyor gear reducer (see Conveyor gear reducer removal/installation procedure in this chapter). The gear reducer may have been installed with the headshaft if the feeder breaker frame is equipped with an access notch. Fill with Century 220 lubricant to oil is visible in the sight glass.

 Clean and lubricate splined end of head shaft with ISO 68 hydraulic fluid.

Replacement of wear parts _____________________________________

 Install cover support post and cover.

 Connect conveyor chain. (See Conveyor chain replacement in this chapter).

 Adjust tension on the conveyor chain. (See Conveyor chain adjustment in this chapter).

Fig. 80: Head shaft removal and installation

Lock washer Nut 1” Conveyor chain (not shown) Male clevis

Swivel bearing

Head shaft Female clevis

Cotter pin

Pin

Hydraulic motor

Hex bolt (8) 1”X 5”NC Flat washer

Access notch Splined adapter Shaft retainer Retaining bolt M20 X 2.5 X 100 10.9 Reducer end cover Hex bolt (5) 1/2”X 2 1/4”NC

N C . I C A , R I M E A R U S U C Y B ©

____________________________________ Replacement of wear parts

Head shaft sprockets

The head shaft sprocket transmits the torque of the hydraulic motor to the conveyor chain assembly. It is part of the head shaft assembly. As soon as the sprockets are worn they must be replaced. Due to the high abrasion forces the chain sprockets are subject to a very high level of wear.

How to remove the head shaft sprockets

To remove the sprockets from the head shaft assembly proceed as follows (Fig. 81):

 Remove the head shaft assembly from the feeder (see Head shaft removal in this chapter).

 Remove the two (2) bearings from the head shaft.

 Remove the two (2) set screws from each sprocket. It may be necessary to apply heat because the screw are reained witth

Loctite.

 Slide both sprockets from the drive shaft.

 Remove old keys.

 Inspect all components of the drive shaft for wear and damage.

See parts manual for replacement parts list.

How to install the head shaft sprockets

To install the sprockets on the head shaft proceed as follows (Fig. 81):

 Thoroughly clean and lubricate the drive shaft with Spec. 100-3 grease.

 Insert one of the keys into the shaft keyway and slide first sprocket onto shaft (see Fig. 80 for location). It is customer preference on whether to weld the sprocket in place or not. See Fig. 81 for weld spcifications. Apply Loctite 242 (blue) to screws and torque to 100 ft-lbs.

 Insert the other key into the shaft keyway and slide second sprocket onto shaft (see Fig. 81 for location). It is customer preference on whether to weld the sprocket in place or not. See

Fig. 80 for weld spcifications. Apply Loctite 242 (blue) to screws and torque to 100 ft-lbs.

 Install bearings on shaft (ss Bearing installation procedure in this chapter). Note that the bearing housing must be installed on shaft so that the Taconite seal is facing the middle of the shaft. One of the bearings must have the internal spacer remvoed to allow the shaft to float and not be in a bind.

 Install the drive shaft assembly in the feeder breaker. (See Drive shaft installation in this chapter.) ______________________________________________________________