Hydraulic Test Ports - Ransomes Commander 3520 Manual De Seguridad, Funcionamiento Y Mantenimiento

8 MAINTENANCE & LUBRICATION

8.4 HYDRAULIC TEST PORTS _____________________________________________

If any problems are experienced with the hydraulic
system service ports are provided to enable pressures
to be checked.These service ports are situated beside
the seat on the right hand side of the machine.
All tests, unless stated otherwise, should be carried
out with the hydraulic oil at normal working
temperature.
TEST PORTS
1. Transmission pressure forward:
With the machine restrained and the engine
speed set to maximum 2850r.p.m. & traction
pedal in forward position a reading of 345 bar
(5003 psi) should be obtained.
2. Transmission pressure reverse:
With the machine restrained and the engine
speed set to maximum 2850r.p.m. and traction
pedal in reverse position a reading of 230bar
(3335 psi) should be obtained.
3. Charge pressure:
With the engine speed set to maximum
2850r.p.m.and the transmission oil hot a
maximum pressure of 18 - 26 bar
(261 - 377 p.s.i.) should be obtained.
4. Pump case pressure:
With the engine speed set to maximum
2850r.p.m. Maximum case pressure
must not exceed 1.7 bar (25 p.s.i.) continuous.
Maximum allowable intermittent case
pressure during cold start must not exceed
5 bar (75p.s.i.)
5. Counterbalance pressure:
With the cutting units lowered adjust the
counterbalance control to check minimum
and maximum pressures. These should be
between 13.8 and 27.6 bar (200 and 400 p.s.i.)
Whilst reading this figure do not operate the
steering or traction pedal.
Lift pressure:
With the lift levers held in the lift position and
the cutting unit fully lifted the gauge reading will be:
(a) With minimum counterbalance set 187 bar (2750 p.s.i.)
(b) With maximum counterbalance set 204 bar (3000 p.s.i.)
NOTE: Any servicing of the hydraulic system must
be carried out by trained service personnel.
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