OM--05688
0 SERIES
MAINTENANCE & REPAIR
PAGE E -- 11
NOTE
If a hot oil bath is used to heat the bearings, both the
oil and the container must be
absolutely
clean. If
the oil has been previously used, it must be
thor-
oughly
filtered.
Heat the bearings to a uniform temperature
no
higher than
250
_
F (120
_
C), and slide them onto
the shafts, one at a time, until they are fully seated.
This should be done quickly, in one continuous
motion, to prevent the bearings from cooling and
sticking on the shaft.
Use caution when handling hot bear-
ings to prevent burns.
After the bearings have been installed and allowed
to cool, check to ensure that they have not moved
out of position in shrinking. If movement has oc-
curred, use a suitably sized sleeve and a press to
reposition the bearings.
If heating the bearings is not practical, use a suit-
ably sized sleeve and an arbor (or hydraulic) press
to install the bearings onto the shafts.
When installing the bearings onto the
shafts,
never
press or hit against the outer
race, balls, or ball cage. Press
only
on the
inner race.
Lay the gearbox housing on the bed of an arbor (or
hydraulic) press with the pump side down, and
support it so it is level and stable. Lubricate the in-
board drive shaft bearing (29) and slide it into the
gearbox housing bore until fully seated.
Install the woodruff key (16) in the shaft keyway.
Position the helical gear (15) against the inboard
bearing. Slide the drive shaft and assembled out-
board bearing into the gearbox housing. Align the
woodruff key with the gear keyway, and slide the
gear onto the shaft. Press the drive shaft into the
inboard bearing until fully seated. Install the cover
plate and gasket (14 and 17) and secure with the
capscrews (8).
Apply a light coating of oil to the lip of the oil seal
(25), and press it into the bearing cap (22) with the
lip positioned as shown in Figure 1. The face of the
oil seal should be just flush with the outer face of
the bearing cap.
Install the same thickness of bearing adjusting
shims (26) as previously removed. Install the bear-
ing cap gasket (18), and slide the bearing cap over
the shaft, being careful not to damage or roll the oil
seal lip. Secure the bearing cap with the nuts (20).
NOTE
Drive shaft endplay should be between .005 and
.012 inch (0,127 and 0,305 mm). Add or remove
bearing adjusting shims (26) to achieve the correct
endplay.
Position the bearing housing on a flat surface with
the pump side up, and support it so it is level and
stable.
Reinstall the pipe plug (28) in the gearbox housing.
Slide the pinion shaft into the gearbox housing until
the gear teeth mesh with those of the helical gear,
and the outboard bearing (30) seats squarely
against the bearing bore.
Refer to
PUMP AND SEAL REASSEMBLY
and in-
stall the remaining pump components.
NOTE
Pinion shaft endplay should be between .000 and
.005 inch (0,000 to 0,127 mm). Add or remove bear-
ing shims (34) to achieve the correct endplay.
After the pump components are installed, lubricate
the gearbox as indicated in
LUBRICATION
.
LUBRICATION
Seal Assembly
The seal assembly is lubricated by the medium be-
ing pumped and no additional lubrication is re-
quired.
