NOTE: Optimum performance of the upper gear case requires
“
setting up
”
the pinion & clutch gears with
IMCO procedure as follows.
1.
Take all measurements using the
“
SCX Setup Diagrams
”
(Fig 3) and the
“
SCX Work
Sheet
”
(Fig 4).
2.
After all measurements are taken and proper race thickness has been determined, place
lower race [2
-
6] and thrust bearing [2
-
7] in case.
3.
Place lower clutch gear [2
-
13] with attached tool (backlash tower 01
-
5579) into case.
4.
Adjust rolling preload (8
-
10 in/lbs) on pinion gear by changing Yoke Gear End Shims [2
-
42].
Tighten nut [2
-
36] to 75 ft/lbs.
5.
After proper rolling preload is determined, assemble pinion pack with pinion retainer nut
“
O
”
ring [1
-
20] between pinion seal carrier [2
-
45] and retainer nut [2
-
31].
6.
Torque retainer nut to 200 ft/lbs. (Tool: Pinion Retainer Nut Driver 01
-
5590) (torque wrench
centered on retainer nut, or, if using longer tool be sure to compensate on torque value).
Use new lock nut [2
-
36] and torque to 75 ft/lbs.
7.
Install pinion pack using 4 screws [1
-
23] for testing.
8.
Install dial indicator (indicator bracket 01
-
5588) and pinion gear locking tool (pinion gear lock
01
-
5587) Fig
-
5.
9.
Check backlash, adjust backlash with pinion hub shims [2
-
18] (average backlash should
be .007
-
.010).
10.
Once backlash is determined. Check upper clutch gear by placing gear in lower position with
lower thrust race and backlash tower. This will insure backlash is .007
-
.010 is correct on
upper gear.
11.
Assemble drive shaft gear assembly [2
-
(8
-
17)].
12.
Place the lower clutch gear [2
-
13] onto the clutch shaft [2
-
17], allowing it to rest on the thrust
collar.
13.
Place the lower clutch spring thrust bearing [2
-
14] (silver side
“
up), lower clutch spring [2
-
15],
clutch cone [2
-
16], upper clutch spring [2
-
15], upper clutch spring thrust bearing [2
-
14],
(Note; use a thin layer of grease between the bearing and the gear to keep bearing in place
during assembly), (silver side
“
down
”),
upper clutch gear [2
-
13], clutch shaft retainer [2
-
9]
onto the upper clutch shaft [2
-
17].
14.
Compress the upper clutch gear and install the upper drive shaft retainer keepers [2
-
8].
15.
Install complete clutch shaft assembly into gear case.
16.
Align the clutch gear timing marks
(“+”
over
“
-
“,
or
“
-
“
over
“+”)
with the center of the rear face
of the gear case.
17.
Install pinion pack with
“
O
”
ring [1
-
19] and shims [2
-
18] (shims must be properly aligned).
18.
Torque pinion pack screws [1
-
(22
-
23)] (Important: make sure copper sealing washers [1
-
21]
are in place, short screws in 2 top holes & 2 bottom holes [1
-
22] longer screws in 3 port & 3
starboard holes [1
-
23] to 20 ft/lbs. Use
“
Loctite
242”
on all screws. Note: make sure that the
clutch gear timing marks align to case timing marks, roll pinion to check.
Page 6
UPPER GEAR CASE
-
ASSEMBLY
Summary of Contents for Xtreme Advantage SCX
Page 6: ...Page 2 Upper Case Hardware Seals Fig 1...
Page 8: ...Upper Case Gear Components Fig 2 Page 4...
Page 12: ...Page 8 Page 8 SCX Setup Diagrams Fig 3...
Page 14: ...Backlash Assembly Fig 5 Page 10...
Page 16: ...Lower Gear Case Fig 6 Page 12...
Page 18: ...Lower Case Gear Fig 7 Page 14...
Page 20: ...Page 16 Lower Pinion Height Measurements Fig 8...
Page 23: ...Spline Seat Fig 9 Page 19...
Page 24: ...Running Load Page 20...