Bosch rexroth HyDrotrAC GFt Operating Instructions Manual page 62

62/64 HyDrotrAC GFt >130 knm | Troubleshooting and fault correction
CorreCtion Copy 1 |17.10.2019 | onLy For internAL USe
Bosch Rexroth AG, Issue 10.2019, RE 79094
table 7: Malfunction table of the HyDrotrAC GFt
Malfunction
Changed gearbox noises
Noises
The operating temperature
is substantially higher than
normal
Leaking oil
Lubricating oil is foaming
Decreasing or non-existent
brake action
If the malfunction occurrences cannot be eliminated, please contact one of the
contact addresses indicated on www.boschrexroth.com or in the address
directory in appendix A "Address directory" of the material number-specific
operating instructions.
possible cause
Damaged gears
Bearing play
Bearing play
Gearbox fastening has
become loose
The oil level is too high or
too low
The lubricating oil is too old
or badly contaminated
Defective output seal.
Seals on partition seams or
on the locking screws are
defective
Incompatibility of the filled
in lubricating oil with the oil
remains or the preservation
oil of the planetary gearbox.
Thermal overload of the
multiple-disk brake
remedy
Notify Customer Service.
Check toothed components for
flaws such as pittings.
Let the damaged parts be
replaced by Rexroth Service.
Notify the Rexroth Service.
Tighten screws with the
required tightening torque.
Allow the planetary gearbox to
cool down to approx. 50°C.
Check the oil filling level.
If required, fill with lubricating
oil or drain off lubricating oil if
oil level is too high.
Check in the operating
instructions of the system,
machine or vehicle when the
last oil change took place, if
appropriate proceed to an oil
change. Proceed as described in
chapter 10.2 "Inspection".
Check seals as far as possible,
replace if necessary.
If the leak cannot be eliminated,
Rexroth Service must be
notified.
Replace the lubricating oil and
rinse with appropriate purging
oil.
Contact the Rexroth Service.
Let trained staff or Rexroth
Service employees carry out
an inspection on the multiple-
disk brake. Replace the disks,
springs and sealing elements
per axle.