SECTION 3 - CHASSIS & TURNTABLE
3121171
3-27
TROUBLESHOOTING
The following table is provided to help locate problems in the
gearbox.
Disassembly Information
It is also important this procedure is performed in a workshop
equipped with the proper tools. As well as normal workshop
tools, it is necessary to use special tools that can be made (see
special tools attachment) or may be requested from the manu-
facturer.
Special Tools:
Puller...............................................Code/: 6689960240
Tool for lifetime seal assembly........Code/: 6689960300
Puller for brake disassembly..........Code/: 6689960310
Torque multiplier............................Code/: ATZ.09.016.0
To be able to produce these special tools refer to Figure 3-21.
thru Figure 3-24.
It is important to strictly adhere to all procedures for disassem-
bling and reassembling the gearbox. Proceed with these
instructions using all necessary safety measures, for example:
1.
Plug all gearbox hydraulic ports to prevent contaminat-
ing the circuit and gearbox.
2.
Do not damage coupling surfaces.
3.
Handle with care to ensure personnel safety and guar-
antee reliability of the gearbox.
4.
Provide a work area that meets Work and Health Safety
in the Workplace guidelines.
Disassembly
NOTE:
Below are all the steps to follow during Disassembly and
Assembly. Numbers in brackets in the text correspond to
the references in the exploded view.
Initial inspection can be made without disassembling the hub
from the machine. Before wheel drive disassembling, make
sure that the oil is drained from the hub.
Unscrew and remove the nos. 2 screws M12, grade 8,8, and
remove the hydraulic motor and its O-ring seal (48).
Table 3-5. Troubleshooting
Symptom
Causes
Remedies
External oil leakage:
From the lifetime seal
a) Lifetime seal damaged
a) Replace lifetime seal
From the end cover
a) O-ring seal damaged
a) Replace O-ring seals
From the plugs
a) Plug seal damaged
a) Replace plug seal
b) Plugs or screws loose
b) Tighten the plugs/screws
Too much noise:
Hydraulic noise (during the slowing down
of the motor speed)
a) Hydraulic circuit malfunctioning
a) Verify hydraulic circuit
Inside the gearmotor (reductions)
a) Internal damage
a) Check the gearbox
Other:
Overheating
a) Insufficient oil level
a) Check the oil level and refill if necessary
b) Hydraulic oil too warm
b) Check the hydraulic circuit
c) Brake not fully released
c) Check brake release pressure
Parking brake malfunctioning
Insufficient braking torque
a) Brake discs worn
a) Replace brake disc pack
b) Damaged parts
b) Check brake components
Wheel Locked
a) Parking brake locked
a) Check the complete brake release
b) Mechanical components damaged
b) Replace damaged parts
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