Hydraulic Test Ports - Ransomes ZE Series Safety, Operation And Maintenance Manual

8 LUBRICATION AND 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. and
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.
GB-34
SAFETY, OPERATORS & MAINTENANCE MANUAL
RANSOMES COMMANDER 3520