GEARS AND CASE
a. Spline fit of lo-lo and underdrive clutch gear (B-
5. Place overdrive gear sleeve (B-10) on flat plate
and coat lower 1" with light grease. Assemble one row of
b. Spline fit of direct and overdrive clutch gear (B-
62 needle roller bearings (B-8) to sleeve, add spacer (B-
9) and in a like manner, assemble the second row of 62
c. Underdrive gear sleeve (B-13).
needle roller bearings.
d. Overdrive gear sleeve (B-10).
6. Assemble overdrive gear (B-7) to sleeve and
bearings with clutch teeth of gear up. Place assembly
Spline and sleeve must be a free fit with mainshaft.
1. For model R8031-R only, place lo-lo and
INSTALLATION OF MAINSHAFT:
underdrive clutch gear (B-17) on bench with flange down.
Apply a light coat of grease, approximately 1" wide, to the
The diameter of the main drive gears used in the
ground area above the flange. Assemble one row of 72
R8000 Series auxiliaries are larger than the main drive
needle roller bearings, (B-19) to clutch gear. Assemble
gear bearing bore in the case. This necessitates
spacer (B-20). Apply light coat of grease and assemble
assembly of the drive gear in the case prior to installation
the second row of 72 needle roller bearings or complete
of the mainshaft.
caged needle bearing.
Drive gear pocket bearing (A-10) is
Do not plug oil holes in gears with
made in two pieces. Be sure pocket
bearing is assembled with flanged end of
inner race up or toward mainshaft.
2. Assemble lo-lo gear (B-12a) to clutch gear (B-17)
by placing (B-12a) clutch teeth toward flanged end of (B-
1. For model R8031-R only, position lo-lo gear and
17). Slide over needles and spacer. Place gear and
sleeve assembly (B-17 thru B-20) in rear of case with
sleeve assembly aside.
clutch teeth toward front of case. Mesh with countershaft
gear (C-1). Assemble lo-lo and underdrive clutch collar
3. For models R8031-P and Q, in a similar manner,
(B-16) to lo-lo gear with extended hub toward gear (B-
coat underdrive gear sleeve (B-13) on thrust face and
ground surface with grease and apply two rows of 72
needle bearings (B-14) with spacer (B-15) between.
2. For model R8031-P and Q, place underdrive
gear and sleeve assembly (B-12 thru B-15) in case with
4. Assemble underdrive gear (B-12) to sleeve and
clutching teeth of gear toward lo-lo gear (B-17) and mesh
bearings with clutch teeth of gear away from flanged end.
with countershaft gear (C-10). Move clutch collar (B-16)
Place gear and sleeve assembly aside.
into engagement with underdrive gear (B-12) to hold