Specifications

Service Training
Page 4.2
Section 52
09.04
4.2.5.3 EXPLANATIONS TO TROUBLESHOOTING
The functional tests and any ensuing troubleshooting is performed separately for each main group. The
following components and functions are affected:
4.2.5.4 Hydraulic speed control for the engine
4.2.5.5 Hydraulic braking system
4.2.5.6 Pressure equality and start of control
4.2.5.7 Hydrostatic travel drive
Before commencing with the activities described below, first check the oil level and top up, if required.
If a pressure gauge or a plug must be installed for a test procedure, first depressurize the tank by
unscrewing the breather valve.
The installation points for pressure gauges or plugs are shown in the line hook-up diagram.
In some test steps the hydraulic motors must be disconnected. In this case proceed as follows:
Loosen the high pressure flange fastening screws of the hydraulic motor to be disconnected by about 5
turns, pull back the hoses, slide the cover plate 1.24 (50 x 38) between the motor flange surface and the
sealing surface of the piping (pay attention to the O-rings) and tighten the screws.
List of abbreviations used
LP gauge = low pressure gauge
HP gauge = high pressure gauge
LP = low pressure
HP = high pressure
F pedal = forward accelerator pedal
R pedal = reverse accelerator pedal
Δp = pressure difference
PL = power limiter
If not specified otherwise, all pressure measurements must be performed with the
brake pedal released.