Gorman-Rupp Pumps 86A2-F4L 1242877 thru 1322537 - Manual (Page 31)

80 SERIES OM--00957
MAINTENANCE & REPAIR PAGE E -- 10
small nicks and burrs with a fine file or emery cloth.
Replace the shaft if defective.
Clean and inspect the bearings as indicated in
Shaft And Bearing Removal And Disassembly.
To prevent damage during removal from
the shaft, it is recommended that bearings
be cleaned and inspected in place. It is
strongly recommended that the bearings
be replaced any time the shaft and bear-
ings are removed.
The bearings may be heated to ease installation.
An induction heater, hot oil bath, electric oven, or
hot plate may be used to heat the bearings. Bear-
ings should
never be heated with a direct flame or
directly on a hot plate.
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 the in-
board and outboard bearing cones onto the shaft
with the high side of the tapered roller bearings to-
ward the lubrication cavity. This should be done
quickly, in one continuous motion, to prevent the
bearings from cooling and sticking on the shaft.
After the bearing cones have been installed and al-
lowed to cool, check to ensure that they have not
moved away from the shaft shoulders in shrinking.
If movement has occurred, use a suitable sized
sleeve and a press to reposition the bearings
against the shaft shoulders.
If heating the bearings is not practical, use a suit-
able sized sleeve, and an arbor (or hydraulic) press
to install the bearing cones on the shaft.
When installing the bearings onto the
shaft, never press or hit against the rollers
or roll cage. Press only on the inner race.
Pack the bearing cups and cones with No. 0 lithium
base grease.
Press the bearing closure (33) and inboard bearing
cup (31) into the intermediate until seated squarely
against the intermediate shoulder.
When installing the bearing cups into the
bearing bore, push against the outer race.
Never hit the rollers or roll cage.
Slide the shaft and assembled bearing cones into
the intermediate bore until the inboard bearing
cone (32) fully engages the inboard bearing cup.
Press the outboard bearing cup (26) over the out-
board bearing cone (27).
Install the same thickness of bearing adjusting
shims (30) as previously remove, and secure them
with the bearing cap (28) and hardware (22 and
23).
NOTE
Shaft endplay should be between .003 and .005
inch (0,08 to 0,13mm). Add or remove bearing
shims to establish the correct endplay.
Lubricate the bearings as indicated in LUBRICA-
TION at the end of this section.
Securing Intermediate And Drive Assembly To
Engine
(Figure 3)
Install the shaft key (25, Figure 2) in the shaft key-
way. Position the flexible portion of the coupling as-
sembly (3) on the shaft as shown in Figure 3.
NOTE
The flexible portion of the coupling must be proper-
ly positioned on the shaft. The heads of the caps-
crews in the center of the coupling
must be posi-
tioned toward the pump end of the shaft.
Align the keyway in the bushing (2) with the shaft
key, and slide it onto the shaft until it is
just flush