9
Assembly
Before assembling a new pinion gear in the pinion cage, check
match numbers on pinion gear and spiral bevel ring gear to be
certain that they are a matched set. Gears are lapped in matched
sets at the factory and should not be separated. Numbers are
etched on both the pinion and ring gear as illustrated in Figure 3.
All parts that are to be reused should be thoroughly cleaned before
being reinstalled. Replace bearings if necessary.
Pinion Cage Subassembly
1. Place oil slinger (
301
) on pinion shaft.
2. Press head bearing cone (
311
) on pinion shaft making sure
oil slinger and bearing are against gear.
3. Press bearing cups (
311
and
312
) into pinion cage.
4. Lower pinion cage on pinion shaft, until head bearing cone
and cup mate.
5. Press tail bearing cone (
312
) on pinion shaft until it mates
with its bearing cup.
MATCHED NUMBER TO BE COMPARED WITH THE SAME
NUMBER ON THE RING GEAR. (EXAMPLE CO-43)
PINION SETTING DISTANCE. (EXAMPLE 4.860)
BACKLASH (NORMAL) AT WHICH THE GEARS WERE
LAPPED. (EXAMPLE .010)
MATCHED NUMBER TO BE COMPARED WITH THE SAME
NUMBER ON THE PINION GEAR. (EXAMPLE C0-43)
THE PINION SETTING DISTANCE IS THE DISTANCE
THE END OF THE PINION SHOULD BE FROM THE
CENTERLINE OF THE RING GEAR SHAFT.
Figure 3
Gear Match Numbers and Setting Data
6. Install locknuts and lockwasher (
103
and
104
). Tighten nuts
on bearing cone until 5 to 15 in·lbƒ (565-1695 mN·m) of
bearing preload is obtained. Bearing preload is the resistance
in the bearings to shaft rotation measured in in·lbƒ required
to rotate the shaft at uniform velocity. Preload is necessary
to insure the stability of the gear engagement. Crimp the
lockwasher to hold the two nuts in place.
7. Install O-ring (
503
) in groove on pinion cage. Install
O-ring (
505
) on pinion shaft outboard of locking-nut threads
8. Install oil seal* (
501
) onto the pinion shaft.
9. Position O-ring (
504
) in groove in cap and place cap on shaft.
Slide cap up against pinion cage and install bolts.
10. Record the pinion setting distance that is etched on the pinion
gear.
field repair
Summary of Contents for MARLEY Geareducer 1800
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