TM 5-3810-294-34
b.
Installation.
remove shims (8, 9, or 10, FIG. 2-12) to bring the
backlash within these limits.
(1) Refer to figure 2-12 and install the shaft
follows:
(a) Install bearing (5).
(b) Install a new oil seal (16) in retail
(17). Inspect seating surface of spacer (14) to sure the
seal is not damaged by contact with rough surface.
(c) Install spacer (14) and retainer (17
with oil seal (16) on pinion shaft (15).
(d) Warm and install bearing (7) on
pinion shaft (15). Be sure the inner race is seated firmly
against spacer (14).
(e) Place spacer (6) on pinion shaft
(15) and insert entire assembly through the bottom of
bore in the revolving frame. Block the pinion shaft so
that it cannot drop out.
(f)
Working through the access
opening the revolving frame top, install bearing (5), gear
(4), washer (3), and capscrews (1). Do not lockwire the
capscrews at this time.
(g)
Install a new O-ring (18) in
retainer (11). Install shim (8, 9, and 10) and gasket (19)
Install retainer (11) with O-ring (18) in place in the
retainer and secure in position with six nuts (12) and
lockwashers (13).
Figure 2-13. Checking vertical swing shaft bevel gear
(2) With the vertical swing shaft installed
backlash.
as instructed above, check the backlash and tooth
contact between the horizontal swing shaft gears and the
(b) If gear tooth contact is not in the
vertical swing shaft gear (4) as follows.
approximate center of the vertical swing shaft gear (4,
(a) Refer to figure 2-13 and check
FIG. 2-12) as illustrated in figure 2-14, it will be
backlash between the gears as shown. Correct backlash
necessary to move the horizontal swing shaft in or out,
between 0.008 ands0.013 inch. If backlash is not within
as required, by removing or installing shims (18, 19, and
these limits, it will be necessary to add or
20, FIG. 5-12).
2-33
