ZF Repair Manual: ZF63A, ZF63, ZF80A, ZF80-1A
<< Previous of 84 Next >>5. MEASURING THE BEARING CLEARANCE/ADJUSTING THE PRETENSION
OF BEARINGS
5.1 General
The required pretension/play of bearings of the indivi-
dual shafts in the housing is obtained by using shims
of different thickness under the outer races of the taper
roller bearings. Shims which have been removed during
disassembly may be reused.
First adjustment must refer to bearing clearance.
Take out from the front cover (Fig. 5-1) at least shims of
0.2 mm (0.0079 in.) thickness from the shims packages
which were removed during disassembly.
FIG. 5-1
Adjustment values
Pretension (mm)
Shaft
Input
Intermediate
Output
ZF 80A - ZF80-1 A
0.02-0.12
0.00-0.12
0.00-0.12
ZF63 A - ZF 63
0.02-0.12
0.00-0.12
0.05-0.15
Pretension (inches)
Shaft
Input
Intermediate
Output
ZF 80A - ZF80-1 A
0.001-0.005 0.000-0.005 0.000-0.005
ZF63 A - ZF 63
0.001-0.005 0.000-0.005 0.002-0.006
5.2 Mounting outer races of tapered roller
bearings into housing
Heat input half housing in an oven to approx. 120 ëC
(248 ëF) and insert shims and outer races of bearings
into it (item 1, Fig. 5-2).
|
WARNING
|
Handle heated housing half only with protective
gloves!
When half housing has cooled down to ambient tem-
perature, press outer races carefully down using a cop-
per/brass punch.
FIG. 5-2
5.3 Inserting gear set into housing
Finish housing mating face halves with an oilstone.
|
CAUTION
|
Make sure to keep any dirt out of housing.
.
Holding the half housing on a swiveling stand, insert
gears into it.
.
Mount input housing half (item 1, Fig. 5-3) with all
bolts, lock washers (item 2 and 3, Fig. 5-3) and par-
allel pins (item 4, Fig. 5-3).
.
Tightening torque of bolts: 40 Nm (30 ft.lb.).
FIG. 5-3
22
Repair Manual and Spare Parts List
Section 4: Assembly
4
3
2
1
3
2
1