OM-07186
PAH SERIES
MAINTENANCE & REPAIR
PAGE E - 21
When installing the shaft and bearings into
the bearing bore, push against the outer
race.
Never
hit the balls, rollers or cages.
Apply a light coating of oil to the lip of the outboard
oil seal (19) and press it into the pedestal 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 bearing cap.
Install the shaft key (30) in the shaft keyway. Slide
the bushing and sprocket (8 and 9, Figure 8) onto
the shaft to the dimension shown in Figure 8. Install
the bushing setscrews and tighten the setscrews
in an alternating sequence to secure the sprocket
to the shaft. Torque the setscrews to 66.7 ft. lbs.
(800 in. lbs. or 9,2 m. kg.).
Apply a light coating of oil to the lip of the oil seal
(24) and press it into the drive flange (23) 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 bearing cap. Inspect and remove any sealant
shavings from the O.D. of the lip seal.
Install the gasket (25) and slide the assembled
drive flange and oil seal over the impeller shaft. Use
caution not to cut or roll the lip of the oil seal (24) on
the shaft keyway. Secure the drive flange to the
pedestal with the hardware (16 and 17). Torque the
capscrews (16) initially to 80 ft. lbs. (11 m. kg.) in a
criss‐cross pattern, then torque the capscrews
again to 110 ft. Lbs (15,2 m. kg.) in a criss‐cross
pattern, going around the bolt circle 1‐1/2 times.
Lubricate the bearings as indicated in
LUBRICA
TION
at the end of this section.
Securing Pedestal And Drive Assembly To
Engine
(Figure 8)
Align the keyway in the bushing (3) with the shaft
key and slide the bushing onto the shaft. Slide the
flexible portion of the coupling (2) over the bushing
and rotate it until the tapped holes for the two set
screws align with those in the bushing.
With the flexible portion of the coupling and the
bushing properly positioned on the shaft, tighten
the two bushing setscrews in an alternating se
quence until the bushing and coupling are fully se
cured. Torque the setscrews to 66.7 ft. lbs. (800 in.
lbs. or 9,2 m. kg.).
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 end of the shaft must extend 0.64
inch (16,2 mm) from the face of the
bushing.
This will allow the two portions of
the coupling to fully engage when the en
gine bracket is secured to the engine bell
housing without pre‐loading the bearings.
If the complete coupling assembly is being re
placed, apply `Loctite Retaining Compound No.
242' or equivalent to the threads of the hardware (4
and 5) and secure the outer ring of the coupling to
the engine flywheel by torquing the hardware to 50
ft. lbs. (6,9 m. kg.).
Using a suitable lifting device, position the as
sembled pedestal and drive assembly so the flex
ible portion of the coupling seats inside the outer
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.
Secure the drive flange (23, Figure 5) to the engine
bellhousing with the previously removed hardware
(6 and 7).
Secure the pedestal to the support (19, Figure 4)
with the previously removed hardware (15, 16 and
17, Figure 4).
