Oshkosh JLG 1500SJ, Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE
3-16 – JLG Lift – 3121262
3.11 DRIVE HUB - BONFIGLIOLI
NOTE: Machines may be built with either Bonfiglioli or Reggiana
Riduttori wheel drive hubs. See Section 3.12, Drive Hub -
Reggiana Riduttori. Do not use different hubs on the same
machine.
Product Identification
The identification data of the hub is shown on a name plates on
the hub. Figure 3-13., Drive Hub Identification Plate shows
how the information is displayed.
The informations stamped on the name plates must always be
readable. Use the identification data (at least serial number)
for spare part enquiries, information and service, etc.
Hydraulic Motor Installation
The mating areas and the pilot diameter of the gearbox
where the motor is to be mounted must be clean and without
burrs.
Before assembling the hydraulic motor, verify by a depth slide
gauge the correct assembly of the unit checking the axial dis-
tance as shown in the scheme below as shown in the scheme
below.
1. Fit the O-ring seal, supplied with the gearbox, in its seat
in the hydraulic motor, and assemble it to the gearbox
being careful not to damage the seal already fitted.
2. Torque the bolts to 63.5 ft.lbs. (86 Nm) torque.
Installation of the Wheel Drive on the Machine
1. Clean the mating surfaces from oils or paint and fit the
wheel drive on the machine frame.
2. Attach the gearbox to the machine frame with the
mounting bolts and torque to 178 ft.lbs. (241 Nm).
Start Up and Running In
If new hubs are being installed, it is advised to follow the
measures given below:
1. Bleed air from every part of the hydraulic and add oil in
the tank if necessary.
THE PRESENCE OF RESIDUAL AIR IN THE HYDRAULIC CIRCUIT WILL BE REC-
OGNIZED BY THE PRESENCE OF FOAM IN THE TANK AND WILL LEAD TO A
JERKING OF THE MOTOR AS WELL AS EXCESSIVE NOISE COMING FROM THE
MOTOR AND THE VALVES.
2. Start the gearmotor at a low speed and gradually
increase it after having verified that it is functioning cor-
rectly without any noises or vibrations.
DO NOT REACH MAXIMUM PRESSURE UNLESS THE ENTIRE SYSTEM HAS BEEN
FILTERED TO ELIMINATE ANY PARTICLES OF DIRT THAT MAY BE PRESENT.
NOTE: During the running-in stage follow the steps given
below.
3. Check the correct revolution and direction of rota-
tion.
4. Make sure that the functioning is regular and without
any excessive noises and vibrations.
5. Make sure that the oil temperature does not exceed
values listed previously.
Figure 3-13. Drive Hub Identification Plate