Differential Assembly - Toro Greensmaster Flex 21 Service Manual

Differential Assembly

RIGHT
FRONT
7
1. RH (short) axle
2. LH (long) axle
3. Retaining ring
The differential assembly is an integral component of
the gearbox assembly. Service of the differential assem-
bly requires removal and disassembly of the gearbox.
Disassembly (Fig. 50)
1. Remove gearbox from mower (see Gearbox Remov-
al) and disassemble gearbox (see Gearbox Disassem-
bly) to remove differential assembly.
2. Support differential assembly and drive out roll pin
that locates drive pin. Discard roll pin.
3. Remove drive pin, two thrust washers, and two bevel
gears.
4. Remove both retaining rings from each axle. Discard
retaining rings.
5. Pull each axle free from gear, thrust washer, and dif-
ferential input gear housing. Note that axle thrust wash-
ers are different from thrust washers used on drive pin.
Inspection (Fig. 50)
1. Clean all differential components.
2. Inspect all differential gears carefully looking for
chipped teeth, wear, or other damage. Because gear
tooth damage is rarely isolated to one gear, the four bev-
el gears are only available as a complete set.
Traction and Reel Drive System (Rev. C)
1
5
9
4
Figure 50
4. Differential bevel gear set
5. Drive pin
6. Washer
Page 4 – 34
8
6
4
3
2
7. Thrust washer
8. Roll pin
9. Input gear/housing
3. Scoring or wear on axle shafts or drive pin require
component replacement.
4. Damage to the input gear/housing requires the re-
placement of the entire differential assembly. Inspect
gear teeth, axle bearing areas, and drive pin bores.
Assembly
1. Insert RH (short) axle into input gear/housing on the
gear side. Install thrust washer, gear and two new retain-
ing rings on short axle. Install LH (long) axle into remain-
ing side of input gear housing using the same
procedure.
2. Through the open sides of the input gear housing,
align remaining two bevel gears and rotate axle to move
them into their correct position.
3. Place a thrust washer between input gear/housing
and each bevel gear. Install drive pin with grooved end
located at roll pin hole.
4. Check gear and shaft alignment by rotating one axle.
The other axle should turn in the opposite direction with-
out any binding. Once free axle movement is checked,
install new roll pin to secure drive pin.
5. Install differential assembly in gearbox and re-
assemble gearbox (see Gearbox Assembly). Install
gearbox to mower (see Gearbox Installation).
4
6
Greensmaster Flex 21