SB--7--627 Page 19
SECTION 6
REPAIR & REPLACEMENT
FIGURE 14 -- TIMING GEAR AND HUB REMOVAL
D
C
B A F E
With proper maintenance and lubrication, normal life of
bearings, gears and seals can be expected.
To
maintain the efficiency of your unit, however, these
parts must be repaired or replaced when required.
Timing Gear and Hub Removal --
Refer to
FIGURE 14.
1.
Remove the gear case (Gear Inspection, page
15).
2.
Remove the cap screws (E), washers (F), lock
nuts (A), and lock washers (B) from both shafts.
3.
Match mark the shafts, gears and hubs to assure
proper repositioning on completion of the work.
4.
Remove gears (C) from hubs (D) and hubs from
shafts. A gear puller may facilitate removal.
Always match mark hubs in relation to shafts.
To reassemble:
1.
Replace the hubs. When installing hubs, apply
anti--seize compound on the splines. Do not use
force to install hub. In most cases it will be nec-
essary to heat the hub to about 175
_
to 200
_
F.
Take
care
that
the
hubs are
assembled to their original position
on the shafts.
2.
Replace gears.
3.
Replace cap screws, washers (always turn
washers over when replacing), locknuts, and lock
washers to each shaft.
4.
Establish a position for one gear, tighten the cap
screws and locknut on that gear only. Then
proceed with retiming according to instructions
outlined in “Resetting Impeller Clearances,” page
16.
5.
Tighten the lock washers and nuts and use a
torque wrench to tighten cap screws on the timing