Mariner Mercury 105/140 JET, Service Manual

Page: 594 / 797

6B-38 - LOWER UNIT 90-824052R3 JUNE 2002
REVERSE GEAR AND BEARING CUP
ADAPTOR REASSEMBLY
1. With reverse gear teeth facing down, use
mandrel (91-86943) to press propeller shaft
needle bearing (NUMBERS/LETTERS UP) into
reverse gear until short shoulder on mandrel
bottoms on reverse gear.
a
c
d
b
51883
a - Reverse Gear Teeth
b - Mandrel (91-86943)
c - Propeller Shaft Needle Bearing
d - Shoulder
NOTE: If gear housing has been replaced or inspec-
tion determines that reverse gear bearing adapter
must be replaced, assemble and install as follows:
2. Place reverse gear ball bearing (NUMBER/
LETTERS UP) on top of mandrel 91-31106.
Using suitable mandrel, press bearing cup
adapter onto reverse gear bearing. The purpose
of mandrel 91-31106 is to ensure that reverse
gear ball bearing is fully seated into bearing cup
adapter.
a
b
d
c
51911
a - Mandrel
b - Bearing Cup Adapter
c - Reverse Gear Ball Bearing
d - Mandrel (91-31106)
3. With reverse gear teeth facing down, use a suit-
able mandrel which contacts the INNER RACE
DIAMETER of the reverse gear ball bearing, to
press bearing and adapter onto reverse gear until
the bearing seats against gear shoulder.
b
d
a
c
51879
a - Reverse Gear Teeth
b - Mandrel
c - Inner Race Diameter
d - Shoulder
4. With Driver Tool (91-18605) installed in reverse
gear assembly, place entire assembly into gear
case.
a
b
51876
a - Driver Tool (91-18605)
b - Reverse Gear Assembly
5. Install pilot ring (91-18603) over driver tool
(91-18605) and seat pilot ring in gearcase
against inner ledge. Thread retainer (91-18604)
into bearing carrier threads. Install screw
(10-18602)
into retainer and gently tighten screw
against driver tool while holding retainer