Service 29
Pack hub cap Item 5 with lube and drive it
home. Continue lubing hub until lube emerg-
es around seal’s outside diameter.
FIGURE 59 PHOTO NO. 3011
GEARBOX
A Gearbox can best be worked on as follows:
1. Detach tractor PTO at gearbox input spline
and remove cross drive shaft shield.
2. Remove the top 4 1/2” bolts holding the
gearbox/PTO input shield and remove it.
3. Remove the bottom 4 1/2” gearbox mount-
ing bolts and slide the gearbox rightward
sufficient to uncouple it from its left splined
coupler. Then slide the gearbox forward and
place it on a workbench.
4. Remove the gearbox drain plug and discard
the lube.
The gearbox has no shims because preload and
backlash are factory set. To service this box pro-
ceed as follows:
1. Remove (12) 3/8” socket head bolts Item
1 in Photo 3008A holding the (2) halves
together. Tap input shaft Item 2 with a soft
hammer, while holding the output shaft Item
3 off the work table. Be careful to not dam-
age the case’s mating surfaces by prying
them apart.
2. The input and output shafts and gears are
precision fitted. Do not separate them by
prying on an individual set. Lift them apart
together.
3. Remove old anaerobic sealant and com-
plete necessary maintenance. Whenever a
gearbox is opened, all (3) oil seals Item 4
should be replaced. Lube the seal’s inside
diameters before reinstalling and insure
their spring garters are toward the gearbox’s
inside.
4. Clean gearbox of all dirt and metal particles.
Inspect all removed parts for wear. Replace
any bearing showing signs of pitting, inability
to rotate freely and discoloration. Clean any
bearings to be reused and coat with gear
lube. Replace gears showing pitting, breaks
or deformation. Replace input and through
shafts having spline wear or deformation.
5. Whenever shafts are disassembled, make
sure the same thickness snap rings Item 5
are used to maintain backlash and preload.
There is one external snap ring used. For
reassembly, capture bearings and seals in
appropriate machined areas. Tap gently with
a soft hammer to seat, being careful to not
damage seals.
6. After both shafts have been reseated, ap-
ply anaerobic sealant (eg. Locktite 518 (red)
or Perma-Lok HH 190 (dark purple) or Per-
matex silicone sealant 765-1344/1485) to
housing top half and reseat it on bottom half.
Apply pressure, or tap lightly, until top half is
firmly in place. Replace, and retorque the 12
previously removed socket head bolts.
Commercial anaerobic sealants have installa-
tion and SAFETY CAUTIONS on their contain-
ers. These should be adhered to.
FIGURE 60 PHOTO NO. 3008A
Reinstall gearbox in reverse order of removal.
Summary of Contents for 5710
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