JLG 26MRT ANSI Service Manual - Manual (Page 29)

SECTION 2 - PROCEDURES
3120791 – JLG Sizzor – 2-17
Cleaning and Inspection
1. Use a standard metal cleaning solvent to clean out
the bearing bore in the housing. Wipe this area
clean, making sure it is free from dirt or any other
contamination that might be present.
2. Inspect the machined surfaces of the axle shaft,
such as the seal and bearing diameters. Clean the
axle shaft and remove all nicks or burrs.
3. If the wheel bearing is to be replaced, proceed to
Installation. If the bearing is to be re-used, clean the
bearing cup with any of the standard metal cleaning
solvents. Inspect the cup for any possible wear,
nicks, etc.
4. The cone assembly can be cleaned in place on the
axle shaft. Use any standard metal cleaning solvent
and a stiff bristle brush to remove any dirt or any
other contamination that might be present, then use
compressed air. Air should be directed at the cone
assembly so that it goes through the bearing from
one end to the other. It is important not to “spin dry”
the bearing with compressed air. Spinning the dry
bearing may score the raceways and rollers due to
the lack of lubricant. Proceed to Installation, step 7,
to lubricate the bearing.
Installation
NOTE: The wheel bearing retainer ring area of the axle
shaft is 1.3790 inches (35.0266 mm) minimum in
diameter, and the wheel bearing retaining ring is
1.374 inches (34.90 mm) maximum. Therefore, it
should require some 6,000 lb. (2,722 kg) minimum
press to seat the ring against the wheel bearing.
1. When replacing the wheel bearing, if the flange plate
and adapter ring are still attached to the axle shaft
flange, remove the bolts from the flange plate and
adapter ring, then remove the.flange plate and
adapter ring from the axle shaft.
2. Install the axle shaft retainer plate and a new outer
shaft seal on the axle shaft. The rubber portion of the
oil seal, which extends beyond the casing, has num-
bers bonded in the rubber. These numbers are to
face toward the flange of the axle shaft.
3. Install a new wheel bearing on the axle shaft. Slide
an installing ring (Dana part no. SP-5439) on the axle
shaft. Besure to locate the wheel bearing on the
inside of the installing ring. Slide the adapter ring
(Dana part no. SP-5017) on the axle shaft and locate
on the installing ring. Install bolts and washers
(Dana part nos. SP-5026 and SP3020) through the
holes in the adapter and into the flange plate.
4. Tighten the bolts alternately and evenly, making sure
that the bearing is not cocked on the axle shaft.
Continue until the wheel bearing is seated. To make
sure the bearing is seated, use a 0.0015 inch
(0.0381 mm) feeler gauge between the bearing seat
and the bearing. If the gauge enters, force the bear-
ing further onto the axle shaft, until the gauge does
not enter.
5. Loosen and remove the bolts and washers on the
adapter ring and remove the adapter ring and the
installing ring from the axle shaft. Install the wheel
bearing retainer ring on the axle shaft. Slide the
installing ring onto the axle shaft, then slide the
adapter ing onto the axle shaft and locate on the
installing ring. Install bolts and washers through the
holes in the adapter ring and into the flange plate.
6. Tighten the bolts alternately and evenly, making sure
the wheel bearing is not cocked on the axle shaft.
Continue until the retainer ring is seated. Use a
0.0015 inch (0.0831 mm) feeler gauge between the
wheel bearing and the retainer ring to be sure that
the retainer ring is seated. At least one point should
exist, where the gauge will not enter between the
retainer ring and the wheel bearing. If the gauge
enters completely around the diameter, the retainer
ring must be forced further onto the axle shaft.
7. After the used bearing has been inspected and
approved for continued service, or after the new
bearing has been installed on the axle shaft, it must
be lubricated prior to axle shaft installation.
8. On the axle shaft, push the seal and retainer away
from the bearing to allow a cavity between the seal
and bearing.
9. Fill the cavity between the seal and bearing with the
recommended lubricant, a good quality number 2
E.P. (extreme pressure), lithium soap, wheel bearing
grease.
10. After the cavity is full of lubricant, wrap tape com-
pletely around the rib ring and seal to enclose the
cavity.
11. With tape still wrapped around the ring, push the
seal up until it contacts the rib ring. This will force the
lubricant up through the rollers.
NOTE: If lubricant is not apparent on the small end of the
bearing rollers, repeat steps 8 thru 11 until lubricant
appears.
12. Remove the tape and wipe excess lubricant on the
roller bodies.
13. Install a new inner axle seal into the axle housing
using a seal installer and handle (Dana part nos. D-
157 and C-4171). Lubricate the lip of the seal.