Table of Contents
Advertisement
82/88
Hägglunds DUc Drive unit | Troubleshooting
Source of trouble,
Mechanical Drive
effects
Power Take-off
1. Coupling
either does not
wrongly aligned.
turn at all or
2. Coupling loose.
too slowly. (no
3. Coupling
delivery flow
defective.
or insufficient
4. Loose mounting
delivery flow)
on pump and/or
motor.
5. Other
transmission
elements loose.
6. Pump or motor
defective.
7. Direction of
rotation wrong.
Excessive
operating
temperature
Line shocks when
switching takes
place.
The pump
switches on and
off too often.
Bosch Rexroth AB, Version 06.2020, RE 15326-WA
Causes Of Trouble And Its Effect In The Hydraulic Installation
Suction Line
Suction resistance
is excessive :-
1. Valve in the
suction line is part
open.
2. Suction filter
clogged or too
small (if fitted).
3. Suction line
blocked or leaking.
4. Suction line is
sized wrong.
5. Fluid level too
low.
Pump
Pressure Line
1. Internal leakage
1. Leakages.
due to wear.
2. Excessive line
2. Pump defective.
resistance.
3. Inlet and return
3. Pressure filter
lines wrongly
blocked.
connected.
1. Reduction in
1. Pipe bore is
efficiency due to
too small, causing
wear.
high frictional
2. With variable
resistances.
pumps, the pump
2. Pressure filter
control system is
blocked.
defective.
3. Rotational speed
and/or delivery
excessive.
1. Line mounts are
missing or loose.
2. Poor
installation.
3. Pipe bore too
small.
4. Installation not
bled.
5. Oil volume in
lines is excessive
1. Pump defective.
2. In the case
of accumulator
systems, the pump
is incorrectly sized.
Return Line
1. Excessive line
resistance.
2. Filter blocked.
1. Pipe bore is
too small, causing
high frictional
resistances.
2. Return filter
blocked.
1. Lines loose.
- Quick Links:
- Technical Data
Hide quick links:
Advertisement
Table of Contents
