Crossbar

Removing Gearbox from Cutter

Remove safety shielding. Remove top cover and siphon gear lube from gearbox. Remove drive lines. Remove crossbar (see Crossbar Removal). Remove gearbox from cutter.

Gearbox Assembly - Cutter Head

Press cups into main housing until they seat against machined shoulders. Press bearings onto shafts until they seat against machined surface next to gear.

Install vertical shaft into gearbox housing, and horizon- tal shaft into horizontal housing, then press bearings on with sleeve until all free play is removed (similar to adjusting front wheel bearings on an automobile). Check by spinning housing. It should turn freely.

If bearings are too tight, hold housing and rap gear shaft with a lead hammer. Do not leave bearings adjusted too tight. Proper adjustment is essential to good bearing lift.

Install the vertical and horizontal shaft seals.

After seating the seal on the vertical shaft, depending on when the gearbox was manufactured there are two options:

1.Place a 1-5/8 ID x 2-31/32 OD washer over the shaft and into the neck of the gearbox housing. You will need to tap this washer in place until the gearbox is installed on the cutter.

2.Press a 1-5/8 ID x 2-3/4 OD washer and a washer retainer firmly against the seal.

Bearing adjustment on the vertical shaft is set with the sleeve and maintained with proper crossbar shimming.

Bearing adjustment on the horizontal shaft is set with the sleeve and maintained by tightening a large hex nut against the sleeve, installing a dowel plug in the nut and tightening a set screw against the dowel. Prior to installing the nut, clean the threads on the nut and the shaft and apply two drops of Loctite on the threads.

Horizontal Housing Installation

With the housing assembled, place the square O-ring on the housing and install to gearbox, tighten the four bolts evenly. Turn the gears against each other to determine how they rotate. They should turn freely. If there is a spot where they turn hard, install a gasket between the horizontal housing and gearbox.

Gearbox Assembly - Input

Press cups into main housing until they seat against machined shoulders. Press bearings onto shafts until they seat against machined surface next to gear.

Install input shaft into gearbox housing, then press bearing on with sleeve until all free play is removed

(similar to adjusting front wheel bearings on an auto- mobile). Check by spinning housing. It should turn freely.

If bearings are too tight, hold housing and rap gear shaft with a lead hammer. Do not leave bearings adjusted too tight. Proper adjustment is essential to good bearing life.

Install input shaft seal.

Bearing adjustment on the input shaft is set with the sleeve and maintained by tightening a large hex nut against the sleeve, installing a dowel plug in the nut, and tightening the set screw against the dowel. Prior to installing the nut, clean the threads on the nut and the shaft and apply two drops of Loctite on the threads.

Output Shaft Installation

Place the square O-ring on the housing and install to gearbox, tightening the four bolts evenly. Turn the gears against each other to determine how they rotate. They should turn freely without bearing end play. If there is a spot where they turn hard, install a gasket between housing and gearbox. If there is bearing end play, remove gasket.

Install seals on both ends of shaft.

Removal

For crossbar removal, it is necessary to gain access to bottom side of cutter. Raise cutter and securely block up. You may use either puller screw (6) or a small hydraulic jack to remove crossbar. See Figure 6.

Loosen bolts on crossbar clamp. Remove bolt retaining washer by prying washer up and breaking weld. Remove washer and bolt. Remove blades from cross- bar (see page 18). Assemble clevises (1) to each end of crossbar, utilizing blade pins, spacers, keyhole plates and blade pin clips.

Position tube assembly (5) with threaded nut toward crossbar. Install pad assembly (4) in nut on square tube assembly.

Bolt square tube assembly to the clevises using 5/8" x 4-1/2" bolts (2). Insert puller screw assembly (6) into square tube assembly (5) and tighten against pad assembly (4) an gear shaft as shown. For best results, strike head of puller screw with a sledge hammer while tightening screw with a wrench. If crossbar has been installed with Loctite, it may be necessary to apply heat (greater than 500°F) to crossbar to break Loctite bond.

22 Dealer Service	29977 (Rev. 1/23/2009)