20 - FORM NO. 56043042 / Whirlamatic
™
2700 / BHS 7014
WHEEL DRIVE SYSTEM
C
A
E
FRONT
A
A
B
G
F
B
Differential Installation:
9
See Figure 4. Slide each pillow block bearing onto the axle shaft. Make sure that the (3) outside bearing locking collars (E) are
positioned to the outside of the unit (as shown).
10
Install the differential into the chassis. Install and tighten the retaining Screws (A) and nuts for each of the outer pillow block bearings.
11
Center the differential in the chassis. Make certain that the locking collar on each outer pillow block is fully seated in position, but
not locked down. Using a tape measure, measure the distance from each axle end to the fully seated locking collar. Slide the
differential until both measurements are the same. You may have to lightly tap the axle with a block of wood, but the differential
should slide without excessive force.
12
Check for binding of the differential. Temporarily install each key and drive wheel. Hold one still and rotate the other to determine
if the differential is binding. There should be some amount of resistance when you rotate the wheel, but not excessive.
13
Lock each of the outer Locking Collars (E) in place. Using a small punch and hammer, insert the punch into the hole in the collar
and tap the collar to rotate it into a locking position on the axle shaft. Tighten each collar Set Screw (D) (as shown in Figure 5).
14
Install the center pillow block bracket (G). Install the screws and nuts onto the pillow block bearing and bracket, and tighten to the
point where the bracket can still be moved without excessive play. Install the retaining screws that attach the bracket onto the
chassis, tightening them to remove play, but still allowing movement. Verify that the differential can rotate freely, repeating the
procedure described above. Tighten the screws and nuts attaching the pillow block to the bracket. After these screws are tight,
you may tighten the screws that retain the bracket onto the chassis. Verify once again that the differential can rotate freely, holding
one wheel from rotating while rotating the other wheel. Lock down the locking collar, using the same method as described
previously.
Wheel Installation (Old Style) Before SN 1489668
1
See Figure 6. Shim and mount the drive wheels. Shim washers (PN 56101281) are used to remove excessive movement of the
wheel on the shaft, and are placed between the pillow block bearing and the wheel. Make sure that the wheel is slid tight against
the pillow block, and check to see that the axle is extending beyond the wheel hub. Holding the retaining washer in place by hand,
there should be up to 1/16” of clearance between the washer and the hub. If this distance is more than 1/16”, remove the wheel
and install the required amount of shim washers to bring the clearance to between 0 to 1/16”. Recheck by installing the wheel. The
axle should never be recessed below the hub of the wheel, as this will cause excessive loading on the differential. Install the drive
wheel retaining screws and washers.
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
DIFFERENTIAL REPLACEMENT (CONTINUED)
Wheel Hub Installation (New Style) After SN 1489667
1
See Figure 6. Slide Hub Assembly (A) onto axle. Re-install
Screw (B) and Washer (C) and tighten. Slide Hub Assembly (A)
up against the back side of Washer (C) and then tighten the set
screw in the Hub.
2
Install Wheel (D) and Lug Nuts (E) as shown, making sure that the
valve stem is facing to the outside of the machine.
FIGURE 4
revised 2/02
