IMCO SCX Series Installation guide

IMCO SCX SERIES INFORMATION, OPERATION & MAINTENANCE
1. SCX & SCX4 Drives will not fit on a standard gimbal helmet, IMCO HELMET:
#05-8025 Black or #05-8027 Silver or #05-8028 ITS Black is required.
2. Maximum engine idle speed is 800 RPM. Shift drive with a positive move, do not let clutch
sit between neutral and in gear position.
3. Do Not! Install propeller until the drive shift linkage has been properly installed and tested
with the engine running!
4. When using SCX or SCX4 drives it is necessary to have full hydraulic steering for your
safety.
5. When tuning engine, remove propeller and shift drive into forward gear!
6. Do not run your boat with a worn or loose gimbal ring or helmet, worn clevis pins, or clevis bushings.
7. Every hull is different and requires a different setup: Many different things contribute to performance:
water pickup location, cavitation plates, gear ratio, drive height, prop, weight distribution, water conditions,
weather conditions.
8. If you are installing the drive on a new application, consult the manufacture or a dealer with experience
with the hull to determine the proper drive height.
9. SCX Drive is 19 7/8” from crankshaft center line to prop shaft center line (2” shorter than standard
Bravo).
10.The bolt pattern is different from the SCX to the SCX4, lowers cannot be interchanged.
11. Max propeller diameter on the SCX is 16 3/4”, SCX4 is 17” (always check that there is at
least 1/2” clearance between the propeller blades and the drive case).
12.Large diameter propellers installed on a #6 prop shaft will require a torque tab on single engine boats.
13. SCX and SCX 4 drives require a drive oil reservoir with a minimum capacity of 1 1/2 quarts.
14.When installing drive to gimbal or lower to upper always use anti-seize on all threads.
15. When installing lower to upper, inspect all “O” rings, replace as necessary, pressure check to insure
proper seal.
16.If you do your own maintenance and repairs on your IMCO drive, you will need a service manual and
the proper tools. Service manuals and tools are available at www.imcomarine.com/cal_store.
17. Always wear proper safety equipment when operating your boat, testing or running at high speeds.
18. Inspect for: oil level in drive and reservoir, leaks, loose fasteners, worn parts.
Recommended oil: Torco RTF GL-6 Torco Part #A220015CE (unit) Part # S220015C (case) IMCO Part #
09-2600 (unit) Part # 09-2605 (5 Gal.) Part # 09-2610 (case) (100% Synthetic Racing Transmission Fluid)
Replaces SAE 75W90.
Warning!
Warning!
Warning!
Danger!
Warning!
Warning!
Before Running!

To drain oil: remove drain screws form bearing carrier (right below the prop shaft) and on port side of
upper.
To replace oil: pump oil in from lower drain screw until it comes out of upper drain screw hole. Replace
drain screws and add oil to drive oil reservoir.
When changing oil, run the used oil through a strainer to check for metal particles, if there are metal
particles in the oil, it is time for inspection of the gears and bearings. If oil appears milky or off colored
check for leaks.
SCX, SCX4 capacity: 5 qts + reservoir - SCX Upper with SC Lower 4 1/2 qts + reservoir.
19. Drive must be turning before shifting.
20. Do not run engine when drive is trimmed extremely high, or in trailer tow mode.
21.Do not use solvents or chemical cleaner to clean painted surfaces on the drive.
22.When installing or changing propeller use extreme caution, propeller blades can be very
sharp.
22.SCX Upper vertical shaft is 17 tooth spline, SC, Merc lowers are 15 tooth spline. A 17-15 tooth
coupler is available 01-2150 (cannot be used with a spacer).
24. Use extreme caution if modifying lower, case can be weakened or handling can be
adversely.
25.Break in: Do not use full throttle until drive is fully warmed up, do not hold drive at wide open throttle
for more than 2 minutes for the first 3 hours of use.
26. Inspect anode (located on front of cavitation plate) for corrosion or debris; if necessary clean or
replace.
27. Do not shift drive while running on hose with propeller
installed.
28. Rotation: shift linkage pushed in - right hand rotation, shift linkage
pulled out - left hand rotation.
29. Serial # location: Port side below SCX,SCX4 sticker.
Warning!
Warning!
SCX Upper & SCX Lower
New Break in
5-8 hours
After Break in
20-30 hours
SCX4 Upper & SCX4 Lower New Break in
5-8 hours
After Break in
20-30 hours
SCX Upper & SC Lower
New Break in
5-8 hours
Check Drain Plug Magnet
Every 20 Hours
Cauon!
Cauon!
Cauon!
Cauon!

X SCX4T
XTREME
ADVANTAGE
Parts and Service Manual
IMCO
510 East Arrow Highway
San Dimas, CA 91773
[phone] [phone] Fax [phone]
www.imcomarine.com email [e-mail]

TABLE OF CONTENTS
Upper Gear Case - Disassembly …………………………………………………………………………… 1
Upper Case Hardware & Seals (Drawing) …………………………………………………………………….. 2
Upper Case Hardware & Seals (Parts List) …………………………………………………………………….. 3
Upper Case Gear & Components (Drawing) …………………………………………………………….……...4
Upper Case Gear & Components (Parts List) ………………………………………………………………….. 5
Upper Gear Case Assembly ……………………………………………………………………………………….6
Upper Gear Case Assembly Cont. ………………………………………………………………………………. 7
SCXT Setup Diagrams ……………………………………………………………………………………………. 8
SCXT Setup Work Sheet …………………………………………………………………………………….. 9
Backlash Assembly (Diagram) ……………………………………………………………………………………10
Lower Gear Case-Disassembly …………………………………………………………………………….……. 11
Lower Gear Case (Drawing) ………………………………………………………………………………………12
Lower Gear Case (Parts List) ……………………………………………………………………………………..13
Lower Gear Case-Assembly ………………………………………………………………………………………14
Lower Pinion Height Measurements …………………………………………………………………………….. 15
Disassembly-Assembly Tools ……………………………………………………………………………………. 16
Check Oil Before Running
First break in oil change 5-8 hours
Oil is filled to upper drain screw [Fig 1-33]
Pump oil from bottom drain screw [fig 6-36]
Recommended oil change intervals 20-30 hours
Heavy use or high HP change more often.
Serial Number
Date of Purchase
Purchased From
10/16/19 Rev 2

UPPER GEAR CASE-DISASSEMBLY
NOTE; The following instructions assume that the drive has been removed from the transom assembly and
is shifted to the “neutral” position. The lower unit has also been removed, along with the yoke coupler end,
center socket, and cross and bearings. Steps followed by asterisk (**) are required only if inspection indi-
cates component replacement. Brackets following the part name represent the drawing figure # and item #.
1. Remove upper cap screws [1-7,8], remove upper cap [1-3].
2. Remove steering cap screws [1-28], remove steering cap [1-2]
3. Remove pinion hub screws [1-(22,23)].
4. Remove pinion hub assembly [2-(31-45)].
5. Disassemble pinion hub assembly.
6. Remove yoke nut [2-36], and washer [2-37].
7. Remove yoke [2-32].
8. Remove retainer nut [2-31].
9. Remove Yoke gear end shims [2-42], pinion shoulder washer [2-43], and pinion seal carrier [2-45].
10. Remove bearings [2-(38,41)], bearing cups [2-(39,40)], and pinion gear [2-12].
Note; be sure to maintain correct assembly position of the upper & lower thrust bearings & races.
11. Remove upper thrust race [2-6], and upper thrust bearing [2-7].
12. Remove gear assembly [2-(8-13)].
13. Remove lower thrust race [2-6], lower thrust bearing [2-7].
14. Remove oil tank cover [1-41], inspect magnet [1-39].
15. Disassemble gear assy.
Note: Gear on bottom of gear assembly Right Hand Rotation.
Gear on top of gear assembly Left Hand Rotation

Page 2
Upper Case Hardware & Seals
Fig-1

Upper Case Hardware & Seals
Fig-1
Page 3
Item Description Qty Part Number
1Upper Case Black 101-1579
1A Upper Case Silver 101-1580
2See website for steering caps 1n/a
3Upper Cap 101-2555
4Pinion Hub 101-2560
5Screw (5/16-18 x 1/2" Button Head) 108-040705041
6Top Cap Lid 101-2071
7Screw (3/8-16 x 1 3/4" S/S 12 Point) 408-070806111
8Screw (3/8-16 x 1 1/2" S/S 12 Point 408-070806101
9Shift Shaft Plug 111-1024
10 Quad Ring (Cooling Water, Bottom) 111-4024
11 Screw (5/16-18 x 1/2" Allen Set)(Tower Retainer) 108-050705041
12 Quad Ring (Cooling Water, Top) 111-4025
13 "O" Ring (Top Cap) 111-2049
14 "O" Ring (Top Cap Oil Pressure) 111-2013
15 Spring Kit (Seal,Ball & Spring) Kit 01-2045
16 "O" Ring (Water Passage-Upper to Gimbal) 111-2148
17 "O" Ring (Shift Linkage) 111-2129
18 Pinion Hub Shims Kit 01-2548
19 "O" Ring (Pinion Hub) 211-2161
20 "O" Ring (Pinion Retainer Nut) 111-2154
21 Pinion Hub (5/16" Copper Sealing Washers) 10 08-120700004
22 Screw (5/16-18 x 1" Socket Cap) 408-060705082
23 Screw (5/16-18 x 1 1/2" Socket Cap) 608-060705102
24 Screw (3/8-16 x 3/4" HH) 208-010806061
25 Washer (3/8" Star) 208-110800001
26 Washer (3/8" AN) 208-100800001
27 Anode 101-2067
28 Screw (7/16-14 x 1 3/4" S/S 12 Point) 408-070907111
29 "O" Ring (Steering Cap, Oil) 111-2250
30 "O" Ring (Steering Cap, Shift Cavity) 111-2242
31 Detent Kit (Spring & Ball Cylinder) Kit 01-2044
32 Drain Screw Sealing Washer 111-1017
33 Drain Screw 101-2504
34 Guide Pads (Port & Starboard) 201-2471
35 Screw (1/4-20 x 1/2" Flat Head Undercut) 408-020604041
36 Stud (7/16 x 2 1/8") 408-130904741
37 Washer (7/16" AN S/S) 408-100900001
38 Nut (7/16-20 Nylock S/S) 408-080904001
39 Screw (10-24 x 5/8" Socket Cap) 108-060403052
40 Magnet 101-9587
41 Screw (1/4-20x 5/8" Socket Cap) 808-060604051
42 Oil Tank Gasket 111-1030
43 Oil Tank Cover 101-2574
SCX, SCX4, SCXT, SCX4T Upper Seal Kit Kit 11-8008

Upper Case Gear & Components
Fig-2
Page 4

Upper Case Gear & Components
Fig-2
Page 5
Item Description Qty Part Number
1Upper Case Black 101-1579
1A Upper Case Silver 101-1580
2Roller Bearing (Upper Vertical Shaft) 110-3042
3Upper Cap 101-2555
4Pinion Hub 101-2560
5Tower Race 210-6041
6Thrust Race 210-5045-X
7Thrust Bearing (Gear) 210-4044
8Spirol Retainer Ring 201-2055
9Roller Bearing (Internal Gear) 210-3046
10 Gear Replacement 101-4576
11 Gear Spacer 201-9001
12 Upper Vertical Shaft 101-3562
13 SCXT, SCX4T Driven Gear 101-4540
14 Roller Bearing (Upper Vertical Shaft) 110-4020
15 Tower 101-2561
16 Retainer Nut 101-2239
17 Yoke Gear End 101-2085
18 Cross & Bearing 201-2086
19 Center Socket 101-2087
20 Yoke Coupler End 101-2088
21 Nut (Yoke Gear End)(5/8-18 Thin Nylock Steel) 108-091105002
22 Washer (Yoke Gear End) 108-121100002
23 Pinion Gear 101-4538
24 Bearing Cone (Pinion Bearing) 110-1021
25 Bearing Cup (Pinion Bearing) 110-2022
26 Pinion Hub Shims Kit 01-2548-X
27 Bearing Cup (Pinion Bearing) 110-2024
28 Bearing Cone (Pinion Bearing) 110-1023
29 Yoke Gear End Shims Kit 01-2020-X
30 Pinion Shoulder Washer 101-2241
31 Yoke Gear End Seal 111-3029
32 Pinion Seal Carrier 101-2240

Page 6
UPPER GEAR CASE-ASSEMBLY
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 “SCX4T Setup Diagrams” (Fig 3) and the “SCX4T 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 right or left driven gear [2-13] with attached tool (backlash tower 01-5598) into case.
4. Adjust rolling preload (8-10 in/lbs) on pinion gear by changing Yoke Gear End Shims [2-28]. Tighten
nut [2-21] 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 [2-31] and retainer nut [2-16].
6. Torque retainer nut to 200 ft/lbs. (Tool: Pinion Retainer Nut Driver 01-5590). (Torque wrench cen-
tered on retainer nut or if using longer tool be sure to compensate on torque value). Use new lock
nut [2-21] 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. Right Hand: Place driven gear [2-13] on thrust race [2-6] and thrust bearing [2-7]. Install one
gear spacer [2-11] on each side of vertical shaft [2-12], align to engage splines. Install vertical shaft
and gear spacers (coupler spline down) through gear spline. Make sure gear spacers are
engaged! Install gear replacement [2-10]. Install thrust bearing [2-7] and thrust race [2-6].
11. Left Hand: Place driven gear replacement [2-10] on thrust race [2-6] and thrust bearing [2-7]. Install
one gear spacer [2-11] on each side of vertical shaft [2-12], align to engage splines. Install vertical
shaft and gear spacers (coupler spline down) through gear spline. Make sure gear spacers are
engaged! Install driven gear [2-13]. Install thrust bearing [2-7] and thrust race [2-6].
12. Install upper cap [2-3] temporarily using 4 screws [1-8].
13. Check for rolling preload. There should be only a 2-3 in/lbs of rolling preload, no end play.
Warning Note: When checking gear stack rolling, stack should never be larger than case to seat! Check
work sheet measurements! Damage can be caused to bearings or races!
14. Rolling preload can be adjusted by changing race [2-6] on the gear replacement side.
15. Once rolling preload is set, remove upper cap [2-3].
16. Install quad ring [1-10] in case [1-1], install “O” Ring [1-29] and “O” Ring [1-30] in steering cap [1-2].
17. Install steering cap [1-2] using screws [1-28]. Use “Perfect Seal” on threads and torque screws to
35 ft/lbs.

Page 7
UPPER GEAR CASE-ASSEMBLY
18. Install quad ring [1-12] in steering cap. “O” Ring [1-14] in upper case.
19. Install “O” Ring [1-13] on upper cap [1-3] and install upper cap with screws {1-7,8] (Important:
short screws [1-8] in 2 front & 2 rear holes, long screws [1-7] in 2 port & 2 starboard holes).
Torque upper cap screws to 25 ft/lbs.
20. Install oil tank cover [1-43], oil tank gasket [1-42] with “Permatix Form-Gasket. (note; use a very
thin layer on gasket) oil tank cover screws [1-41] with “Loctite 242”, torque to 10 ft/lbs.

Page 8Page 8
SCX Setup Diagrams
Fig-3

SCXT, SCX4T WORK SHEET Serial #
UPPER CAP
Parallels 2.250
Measurement A - Norm 1.862
Cap Deck to Thrust Seat Total B = Norm 0.388
DECK TO PINION CEN-
TERLINE
Deck to Tool Measurement C Norm 2.252
Less Parallel - 1.000
Total Norm 1.252
Plus 1/2 tool + 2.012
Deck to Pinion CL Total D = Norm 3.264
UPPER THRUST SEAT
Deck to Pinion CL D Norm 3.264
B - Norm 0.388
Pinion CL to Upper Thrust Seat Total E = Norm 2.876
Bearing Thickness - 0.157
Mounting Distance - 2.661
Race Thickness F = Norm 0.060
LOWER THRUST SEAT
Measurement G Norm 7.138
Parallel - 1.000
Deck to Lower Thrust Seat Total = Norm 6.138
Deck to Pinion CL D - Norm 3.262
Pinion CL to Lower Thrust Seat Total H = Norm 2.876
Bearing Thickness - 0.157
Mounting Distance - 2.661
Race Thickness J = Norm 0.060
GEAR MEASURMENTS
Gear Measurement K Norm 1.988
Gear Replacement Measurement L Norm 1.990
Total M = Norm 3.978
GEAR ASSEMBLY
Gear & Gear Replacement Total M + Norm 3.978
Race Thickness F + Norm 0.060
Race Thickness J + Norm 0.060
2 x Bearing Thickness + 0.314
Gear Spacer 2 x Spacer Thickness M + Norm 1.340
Gear Assembly Total O = 5.752
CAP CRUSH
Pinion CL to Upper Thrust Seat E + Norm 2.876
Pinion CL to Lower Thrust Seat H + Norm 2.876
Upper Thrust Seat to Lower
Thrust Seat Total P = Norm 5.752
Gear Assembly Total O = Norm 5.752
P and O are to match
Page 9

Backlash Assembly
Fig-5
Page 10

NOTE; The following instructions assume that the lower gear case has already been separated from
the upper gear case. Brackets following the part name represent the drawing figure # and item #.
1. Remove prop adaptor ring [6-39]
2. Bend the tabs of the bearing carrier tab washer [6-37] away from the cover nut [6-38].
3. Remove cover nut [6-34]
4. Remove bearing carrier [6-34]
5. Remove bearing carrier thrust washer [6-28], bearing carrier shims [6-29] & bearing carrier “O”
ring [6-30].
6. Align flats on prop shaft [6-27] to clear pinion gear nut [6-8], remove prop shaft.
7. Remove pinion gear nut [6-8] & pinion gear spud washer [6-7].
8. Remove vertical shaft [6-2].
9. Rotate pinion gear to align bearing driver lugs on pinion gear to align with flats on pinion
bearing (see detail below) and remove pinion gear [6-6].
10. Remove prop gear [6-26].
LOWER GEAR CASE-DISASSEMBLY
Page 11

Item Description Qty Part Number
1Lower Case 101-5390
2Vertical Shaft (SCX) 101-3568
3Shim (Pinion Gear) Kit 01-2394-X
4Cup (Pinion Gear) 110-2037
5Bearing Cone (Pinion Gear Modified) 110-1036
Lower Gear Case
Fig-6
Page 12

Item Description Qty Part Number
6Pinion Gear (1:50) 101-4563
6A Pinion Gear (1:34) 01-4565
6B Pinion Gear (1:25) 01-4597
7Pinion Gear Spud Washer 101-2404
8Nut (Pinion Gear) 101-2397
9Nut (7/16-20 Nylock S/S) 208-080904001
10 Washer (7/16" AN S/S) 208-100900001
11 Stud (7/16 x 2" S/S) 208-130904121
12 "O" Ring (Water Passage) 111-2143
13 "O" Ring (PTFE Oil Passage) 111-4011
14 "O" Ring (Cooling Water Passage) 111-2014
15 Retainer Ring (Vertical Shaft Coupler) 108-211700001
16 Vertical Shaft Coupler 101-2140
17 "O" Ring (Alignment Spacer) 111-2144
18 Alignment Spacer 101-2401
19 Vertical Shaft Bearing Sleeve (2 halves) 1set 01-2400
20 Bearing Cone (Vertical Shaft) 110-1034
21 Bearing Cup (Vertical Shaft) 110-2036
22 Shim (Vertical Shaft) Kit 01-2396-X
23 Shim (Prop Gear) Kit 01-2395-X
24 Bearing Cup (Prop Gear) 110-2031
25 Bearing Cone (Prop Gear) 110-1030
26 Prop Gear (1:50) 101-4564
26A Prop Gear (1:34) 01-4566
26B Prop Gear (1:25) 01-4598
27 Prop Shaft 1 7/16" 101-3571
27A Prop Shaft #6 01-3446
28 Bearing Carrier Thrust Washer 101-2392
29 Shim (Bearing Carrier) Kit 01-2393-X
30 "O" Ring (Bearing Carrier) 111-2349
31 Bearing Cone (Bearing Carrier) 110-1035
31A Bearing Cone (Bearing Carrier #6) 10-1038
32 Bearing Cup (Bearing Carrier) 110-2035
32A Bearing Cup (Bearing Carrier #6) 10-2040
33 Seal (Prop Shaft 1 7/16") 211-3037
33A Seal (Prop Shaft #6) 11-3038
34 Bearing Carrier (1 7/16" Prop Shaft) 101-2398
34A Bearing Carrier (#6 Prop Shaft) 01-2447
35 Drain Screw Sealing Washer 111-1017
36 Drain Screw 101-2504
37 Tab Washer (1 7/16" Prop Shaft) 101-2403
37A Tab Washer (#6 Prop Shaft) 01-2498
38 Cover Nut (1 7/16" Prop Shaft) 101-2402
38A Cover Nut (#6 Prop Shaft) 01-2492
39 Prop Adaptor Ring 101-2399
40 Prop Adaptor (1 7/16" Prop Shaft) 101-3569
41 Thrust Washer (3/4" Heavy) 101-6579
42 Washer (3/4" Spring) 108-221300001
42A Washer (1" Spring, #6 Shaft) 08-221700001
43 Nut (3/4-16 Nylock, Brass) 108-081306003
43A Nut (1-12 Nylock, Brass, #6 Shaft) 08-081712003
43A Nut (1-14 Nylock, Brass, #6 Shaft) 08-081712004
SCX Lower Seal Kit (1 7/16" Prop Shaft) 11-8009
SCX Lower Seal Kit (#6 Prop Shaft) 11-8010
Lower Gear Case Fig-6
Page 13

Note: Optimum performance of lower gears requires pinion height setup, use “lower pinion gear height
instruction sheet” fig 7.
1. Install pinion gear bearing cup [6-4] with pinion gear shim [6-3] and vertical shaft bearing cup
[6-21] with vertical shaft shim [6-22] in case.
2. Install modified pinion gear bearing [6-5] into cup.
3. Install pinion gear measuring slug (01-5589) onto pinion gear bearing.
4. Install vertical shaft [6-2] with vertical shaft bearing sleeves [6-19], and vertical shaft bearing
[6-20] (preinstalled).
5. Install pinion gear spud washer [6-7] into pinion gear measuring slug.
6. Install pinion gear nut [6-8] and torque to 150 ft/lbs.
7. Set rolling preload of pinion gear by adjusting shim [6-3], and [6-22], (8-10 in/lbs.)
8. Once preload is set adjust pinion height by either removing or adding shim to upper bearing cup
[6-21] and removing or adding equal shim to lower bearing cup [6-4]. Pinion height is set using
feeler gauges and “Lower Pinion Height Gauge 01-5483 and “Gear Measuring Slug” 01-5589 as
shown in fig 7.
9. Once preload and pinion height is correct, remove pinion gear measuring slug and vertical shaft.
10. Install prop gear shim [6-23] and prop gear bearing cup [6-24].
11. Install prop gear [6-26], with bearing installed [6-25].
12. Reinstall pinion gear bearing with flats aligned to accept pinion gear (see page 11), pinion gear,
spud washer and nut. Torque to 150 ft/lbs.
13. Temporarily install prop shaft [6-27] with bearing cone [6-31], bearing carrier thrust washer [6-28]
bearing carrier [6-34] with bearing cup [6-32], tab washer [6-37], and cover nut [6-38], torque to
150 ft/lbs for backlash testing.
14. Check backlash and adjust by changing prop gear shim to achieve .007-.010 average.
15. Once backlash is established, remove cover nut, tab washer, bearing carrier, thrust washer, and
prop shaft.
16. Remove pinion nut, clean and reinstall with Loctite 262, torque to 150 ft/lbs.
17. Reinstall prop shaft, thrust washer, bearing carrier shims [6-29], (install enough shims to insure
there is “prop shaft end play”), install bearing carrier, tab washer, and cover nut (torque cover
nut to 200 ft/lbs, apply oil to threads to avoid galling).
18. Measure “end play” and remove enough shims to achieve 24-26 in/lbs total rolling preload with
seals installed in bearing carrier. (Be very careful not to remove too many shims and get a false
preload reading).
19. Once rolling preload is achieved, remove cover nut, tab washer, and bearing carrier.
20. Install “O” ring [6-30], bearing carrier (apply “Perfect Seal” around “O” ring, outside of bearing
carrier, and threads of cover nut),
21. Install tab washer, and cover nut.
22. Torque cover nut to 200 ft/lbs.
23. Bend one tab on tab washer to engage with one of the slots in the cover nut.
24. Install prop adaptor ring [6-39] (apply “Perfect Seal” to threads) and torque to 200 ft/lbs.
LOWER GEAR CASE-ASSEMBLY
Page 14

Lower Pinion Height Measurements
Fig-7
W2.800
X- _______
Y- _______
Z= _______
Page 15

Disassembly-Assembly Tools
SCX4T Upper
1. Tower & Cap Race Puller Kit 01-5443
2. Tower Internal Bearing Puller Kit 01-5445
3. Tower Removal Tool Kit 01-5448
4. Pinion Retainer Nut Driver 01-5590
5. Pinion Center Measuring Slug 01-5583
6. Pinion Bearing Cup Installer (Front) 01-5580
7. Pinion Bearing Cup Installer (Back) 01-5592
8. Bearing & Race Installer (Cap) 01-5581
9. Bearing & Race Installer (Tower) 01-5582
10. Backlash Tool Kit 01-8017
A. Backlash Tower 01-5579
B. Indicator Bracket 01-5588
C. Pinion Gear Lock 01-5587
D. Backlash Wand 01-5449
E. Dial Indicator 01-5591
Upper Tool Kit 01-8088
SCX4 Lower
1. Cover Nut Wrench Kit 01-5441
2. Cover Nut Wrench #6 Kit 01-5490
3. Lower Pinion Height Gauge 01-5483
4. Vertical Shaft Bearing Cup Puller Kit 01-5460
5. Prop Gear Cup Puller Kit 01-5467
6. Pinion Gear Cup Puller Kit 01-5452
7. Lower Pinion Cup & Vertical Shaft Cup Installer Kit 01-5439
8. Prop Gear Cup Installer Kit 01-5469
9. Prop Shaft Seal Driver Kit 01-5478
10. Prop Shaft Seal Driver #6 Kit 01-5438
11. Bearing Carrier Cup Installer 01-5477
12. Bearing Carrier Cup Installer #6 01-5489
13. Gear Measuring Slug 01-5589
Lower Tool Kit 01-8087
Page 16