Test 015: Testing The Low Speed Tracking Setting - jcb JS300 Service Manual

Test 015: Testing the Low Speed Tracking Setting

If experiencing low speed tracking faults, carry out
following checks:
Test 008 Testing track motor speeds
Test 006 Testing pressure switches
The tracking motors change to low speed when the SLOW
and CREEP travel modes are selected.
In addition to the tests do the following checks:
1 Operate the travel mode button and check that the
`tortoise' symbol displays on the DECU (SLOW travel
mode). If the symbol does not display check the
operation of the travel mode button and its associated
wiring.
2 Switch on the ignition and select the SLOW travel
mode. Remove the electrical connector at the travel
speed solenoid CT5. Check that there is no voltage
supply at the connector. If there is voltage supply
check the associated wires and connectors. Refer to
Section C.
3 Fit a suitable adaptor and pressure gauge at pilot port
D on the track motor. Start the engine and select the
SLOW travel mode. check that there is no pilot
pressure at pilot port. If there is pilot pressure replace
the travel solenoid valve CT5. Refer to 8 Station
Solenoid Valve.
4 Repeat steps 1 to 3 in CREEP travel mode ('snail'
symbol displays on the DECU).
Fig 18. 8 station solenoid valve
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Test 015: Testing the Low Speed Tracking Setting
D
CT5
T023460-C2
9813/5100-1
Section E - Hydraulics
Hydraulic System Fault Finding
Fig 19.
716370-C7
E-268