Test 014: Testing The High Speed Tracking Setting - jcb JS300 Service Manual

Test 014: Testing the High Speed Tracking Setting

If experiencing high speed tracking faults, carry out
following checks:
Test 008 Testing track motor speeds
Test 006 Testing pressure switches
The tracking motors change to high speed when the FAST
travel mode is selected.
In addition to the tests do the following checks:
1 Operate the travel mode button and check that the
`hare' symbol displays on the DECU (FAST 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 FAST travel
mode. Remove the electrical connector at the travel
speed solenoid CT5. Check that there is a +24 V
supply at the connector. If there is no 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
FAST travel mode. check that there is 40 bar pilot
pressure at pilot port. If there is no pilot pressure
replace the travel solenoid valve CT5. Refer to 8
Station Solenoid Valve.
If the pilot pressure is incorrect check the servo
pressure. Refer to Service Procedures.
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Hydraulic System Fault Finding
Test 014: Testing the High Speed Tracking Setting
Fig 16. 8 station solenoid valve
D
9813/5100-1
Section E - Hydraulics
Fig 17.
CT5
T023460-C2
716370-C7
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