JLG 26MRT Service Manual - Manual (Page 31)

SECTION 2 - PROCEDURES
3120892 – JLG Sizzor – 2-19
NOTE: On the spline end of the pinion, there are bearing
preload shims. These shims may stick to the bear-
ing - pinion - or even fall out. The shims are to be
collected and kept together since they will be used
later in assembly. Try not to damage the shims. If the
shims are mutilated, replace them with new ones.
13. Pull out the pinion seal using a slide hammer (Dana
part no. D-131) and discard the seal. Install a new
seal at the time of assembly. Remove the bearing
cone and outer pinion oil slinger.
14. Turn the nose of the carrier down. Remove the outer
pinion bearing cup. Locate the driver on the back
edge of the cup and, using a remover and handle
(Dana part nos. D-147 and C-4171), drive the cup
out of the carrier housing.
NOTE: The axle carrier section may vary in pinion bore
depth due to the possible need for either a baffle or a
slinger or both.
The baffle serves the purpose of assisting the lubri-
cant to flow up through the oil channels to lubricate
the pinion bearings. If used, they are part of the pin-
ion setting adjustment.
15. Remove the inner bearing cup using a remover and
handle (Dana part nos. D-148 and C-4171).
NOTE: Shims are located between the bearing cup and the
carrier bore, and may also include an oil baffle. If the
shims and baffle are bent or nicked, they should be
replaced at the time of assembly. Wire the stacks
together and measure each. If the stack has to be
replaced, replace it with the same thickness.
16. Remove the inner pinion bearing cone using a
press, adapter ring, and adapter set (Dana part nos.
DD-914-P, DD-914-9, and C-293-39).
NOTE: Both the baffle and slinger are part of the pinion
adjustment shims and are to be kept intact for
assembly.
Carrier Assembly
1. Assemble the inner axle shaft seals and guides into
the carrier housing using a screw and adapter (Dana
part nos. D-112 snd D-112-1). When assembling the
seals, ensure that they are positioned straight and
do not get cocked. Turn the forcing screw until it
stops; the seal will then be seated.
2. Inspect the flange face of the differential case to be
sure it is free of nicks and burrs. Align the holes of
the gear with the holes in the case and attach the
ring gear to the case using new ring gear screws .
Tighten the screws alternately and evenly. Using a
suitable torque wrench (Dana part no. C-524-A or
equivalent), torque the screws to 61-81 Nm (45-60 ft.
lbs.).
3. Inspect the differential case hubs and remove all
nicks, burrs, dirt, etc. from hubs to allow master
bearings to rotate freely. Install new master differen-
tial bearings (Dana part no. D-135 or equivalent)
onto the differential case.
4. Install the differential case (less the pinion). Mount a
dial indicator (Dana part no. D-128 or equivalent)
with a magnetic base. Locate the tip of the indicator
on the flat surface of one of the gear screws. Mark
the screw with a piece of chalk.
5. Force the differential assembly as far as possible in
the direction towards the indicator. With force still
applied, set the indicator to zero (0).
NOTE: The indicator should have a minimum of 5.1 mm
(0.200 in) travel.
6. Force the differential assembly as far as it will go in
the opposite direction.
7. Repeat steps 5 and 6 until the same indicator read-
ing is obtained in each direction. Record the reading
of the indicator. This will be the total amount of
shims required (less preload) and will be calculated
later during assembly.
8. After making sure the readings are correct, remove
the indicator and differential assembly from the
housing.
DO NOT REMOVE THE MASTER BEARINGS FROM THE DIFFER-
ENTIAL CASE AT THIS TIME.
9. If a new ring gear and pinion are to be used, the fol-
lowing information applies:
Ring gears and pinion gears are supplied in matched sets
only. Matching numbers on both the pinion and ring gear
are etched for verification. If a new gear set is being used,
verify the numbers of each pinion and ring before pro-
ceeding with assembly.
The distance from the centerline of the ring gear to the
button end of the pinion is 67 mm (2.625 in).
On the button of each pinion there is etched a plus (+)
number, a minus (-) number, or a zero (0) number, which
indicates the best running position for each particular gear
set. This dimension is controlled by the shimming behind
the inner bearing cup. For example, if a pinion is etched
+3, this pinion would require 0.076 mm (0.003 in) less
shims than a pinion etched “0". This means by removing
shims, the mounting distance of the pinion is increased to
57.607 mm (2.268 in), which is just what +3 indicates. Or,
if a pinion is etched -3, it would require that 0.076 mm