ZF Repair Manual: ZF25A, ZF25, ZF45A, ZF45-1
<< Previous of 78 Next >>4.5.2 Mounting outer races of tapered roller
bearings into housing
Heat input half housing (item 1, Fig. 5-2) in an oven to
approx. 120 ëC (248 ëF) and insert shims (item 2) and
outer races (item 3) of bearings into it.
|
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.
4.5.3 Inserting gear set into housing
Finish housing mating face halves with an oilstone.
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CAUTION
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Make sure to keep any dirt out of housing.
.
Holding the half housing on a swiveling stand, in-
sert 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.).
4.5.4 Measuring bearing clearance on input
shaft
a) Turn input shaft several times to permit bearings to
seat.
b) Fit clamping ring (tool p/n 618582) to the spline of
the input shaft (item 1, Fig. 5-4).
c) Adjust to «0», dial indicator to obtain accurate read-
ing.
d) With two levers carefully pry on the clamping ring
and record end play of shaft.
NOTE
This step must be done very carefully to obtain the
actual bearing clearance.
e) Carry out steps, a) and d) several times.
ZF25A - ZF25 - ZF45A
f) The bearing clearance measured plus the pretension
required in section 5.1 determine the required thick-
ness of shims.
ZF45-1
f) The bearing clearance measured minus the clear-
ance required in section 5.1 will determine the re-
quired thickness of shims.
23
Repair Manual and Spare Parts List
Section 4
FIG. 5 - 2
4
3
2
1
FIG. 5 - 3
1
FIG. 5 - 4