Gorman-Rupp Pumps PA6C60-QSB4.5P 1537244 and up - Manual (Page 42)

PA SERIES OM-06553
MAINTENANCE & REPAIR PAGE E - 20
Slide the shaft and assembled bearings into the in­
termediate bore until the inboard bearing is fully
seated against the bore shoulder.
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 inboard oil
seal (4) 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.
Apply a light coating of oil to the lip of the oil seal
(15) and press it into the drive flange (16) 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 (18). Apply “Loctite
Retaining Compound No. 242” or equivalent com­
pound to the capscrews (13) and secure the drive
flange to the bearing housing with the hardware
(13 and 14). Torque the capscrews (13) to 40 ft. lbs.
(5,5 m. kg.). Be careful not to damage the lip of the
oil seal (15) on the shaft keyway.
Lubricate a new bearing housing O‐ring (32) 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 (22, 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 screws (6).
Install the screws and lock washers (5) and secure
the outer ring of the coupling to the engine flywheel
by torquing the screws 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.