Gorman-Rupp Pumps PA6C60-4045H 1416490 thru 1485125 - Manual (Page 40)

PA SERIES OM−06081
MAINTENANCE & REPAIR PAGE E − 20
Apply a light coating of oil to the lip of the inboard oil
seal (18) and press it into the bearing housing with
the lip positioned as shown in Figure 4. Press the
oil seal into the housing until the face is just flush
with the machined surface on the housing.
Slide the shaft and assembled bearings into the in-
termediate bore until the inboard bearing is fully
seated against the bore shoulder. Use caution not
to damage the lip seal on the shaft threads.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Apply a light coating of oil to the lip of the oil seal
(12) and press it into the drive flange (9) with the lip
positioned as shown in Figure 5. The face of the oil
seal should be just flush with the outer face of the
drive flange.
Install the drive flange gasket (17) and secure the
drive flange to the bearing housing with the hard-
ware (15 and 16). Be careful not to damage the lip
of the oil seal (12) on the shaft keyway.
Lubricate a new bearing housing O-ring (36) with
grease and install it in the groove in the bearing
housing.
Lubricate the bearings as indicated in LUBRICA-
TION at the end of this section.
Securing Bearing Housing And Drive
Assembly To Engine
(Figure 8)
Install the shaft key (10, Figure 5) in the shaft key-
way. Position the flexible portion of the coupling as-
sembly (1) on the shaft as shown in Figure 8.
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 drive end of the shaft.
Align the keyway in the bushing (2) with the shaft
key, and slide it onto the shaft to the dimension
shown in Figure 8. Rotate the flexible portion of the
coupling until the tapped holes for the two set-
screws align with those in the bushing, and install
the setscrews.
Make certain that the flexible portion of the
coupling is mounted as shown in Figure 8.
This is critical. If the coupling is not prop-
erly positioned on the shaft, the coupling
parts may not fully engage, or a pre-load
condition can cause premature bearing
failure.
The coupling must be positioned 1.44
inches (37 mm) from the end of the shaft.
This will allow the two portions of the cou-
pling to fully engage when the drive flange
is secured to the engine bellhousing, with-
out pre-loading the bearings.
With the flexible portion of the coupling and the
bushing properly positioned on the shaft, tighten
the two setscrews in an alternating sequence until
the bushing and coupling are fully secured. Torque
the setscrews to 14.6 ft. lbs. (175 in. lbs. or 2 m.
kg.).
If the complete coupling assembly is being re-
placed, apply ‘Loctite Retaining Compound No.
242’ or equivalent to the threads of the hardware (6
and 7), and secure the outer ring of the coupling to
the engine flywheel by torquing the hardware to 45
ft. lbs. (540 in. lbs. or 6,2 m. kg.).
Using a suitable lifting device, position the as-
sembled rotating assembly and coupling so the
flexible portion of the coupling seats inside the out-
er ring attached to the engine flywheel.
NOTE
To ease installation, lightly lubricate the rubber por-
tion of the coupling with a non-petroleum based
lubricant such as vegetable oil or glycerin, or a sili-
con-based lubricant such as WD40" or equivalent.
Do not use petroleum-based lubricants, or any oth-
er substance which may soften or otherwise dam-
age the rubber.