Service Manual

ManualsBrandsToro ManualsAeratorsProCore 864 Aerator

ProCore 864/1298Page 4 − 44Coring Head

C. Mount a dial indicator with a magnetic base to the

vise so that the dial indicator touches the pliers

3.100” (78.7 mm) from the center of the input shaft.

D. Rotate the pliers and monitor the dial indicator

reading to check gearbox backlash. Allowable back-

lash is from 0.006” to 0.013” (0.16 to 0.33 mm).

E. If backlash adjustment is necessary, remove gas-

ket(s) from between quill and gearbox housing to de-

crease backlash. Increase backlash by installing

additional gasket(s). Recheck backlash after any

gasket change. Repeat process until backlash is cor-

rect.

F. Remove gearbox from vise.

8. After backlash is correct, check gear pattern to as-

sure that proper gear mesh exists:

A. Remove quill housing assembly and coat gear

teeth on cross shaft with gear mounting compound.

B. Install quill housing into gearbox housing using

the same number of gaskets and secure with six (6)

flange head screws. Torque screws 81 ft−lbs (109

N−m).

C. Rotate the input shaft to establish a gearmesh

pattern in the gear mounting compound. Rotating the

input shaft 1/2 turn will allow all cross shaft gear teeth

to contact input shaft gear teeth.

D. Remove quill assembly from gearbox and inspect

the pattern on the gear teeth.

E. Ideal pattern should cover from 40% to 80% of the

gear face width (Fig. 43). The contact area should be

in the center of each tooth and extend from 20% to

50% of the gear face height. The pattern should not

run off the tooth heel, toe or top.

F. If necessary, adjust the number of soft shim(s)

between housing and inner bearing cone to correct

gear pattern. Make sure to also check and adjust

cross shaft end play.

G. Recheck backlash if any changes are made. Ad-

just backlash if necessary.

9. Apply a light coating of grease on seal lips and seal

OD. Install seals into gearbox bores taking care to not

damage seals during installation. Seals should be

installed until they are flush with the housing.

Figure 42

LOCKING PLIERS

(LIGHTLY CLAMPED)

DIAL

SOFT JAWED

3.100”

INDICATOR

VISE

(78.7 mm)

Figure 43

40% to 80% of

Tooth Width

0.118” (3.0 mm)

MINIMUM

0.197” (5.0 mm)

20% to 50% of

TOE

Tooth Height

HEEL

GEAR PATTERN REQUIREMENTS

0.118” (3.0 mm)

MINIMUM

1. Input gear and shaft

2. Cross shaft

3. Gasket location

4. Soft shim location

Figure 44