nifty TrackDrive TD120T Series Operating/Safety Instructions Manual page 46

TrackDrive (TD) Series
Operating & Safety Instructions
4. Clear descriptions of the interfaces to the SRP/CS and protective devices;
The monitoring of the booms is primarily the circuit through the booms elevated switch, operated via a
cam on Boom 2/3. The initial 'proving' circuit that permits the stabilisers to move has to pass through
the safety relay module which provides a two channel output for safety. The first channel will allow the
operation of the selected power option on the trailer. The second channel has overall control of the
Master dump for the hydraulic circuit. Simultaneous operation of both channels is required for the
machine to function. Loss of either channel will cause the circuit to halt operation.
5. Response time
The monitoring of the booms is active when the jack control lever is depressed at the control station,
ensuring the booms are stowed before permitting use of the jacks.
6. Operating limits (including environmental conditions);
All components within the booms monitoring are rated to the environmental conditions acceptable for
the machine; refer to Section 2.2.
7. Indications and alarms;
Boom stowed.
The action of the booms monitoring circuit will interface with the jack control circuit. There is however
no alarm or indication function associated with the booms being in 'normal' operation.
8. Muting and suspension of safety functions;
While the stabiliser monitoring is always active with the booms raised, the changeover of the boom
switch permits continued operation of the booms until they are returned to the 'stowed' position. The
loss of jack foot contact will be indicated via warning lights regardless of the boom position.
9. Control modes;
The boom monitoring circuit has no user controllable modes of operation.
10. Maintenance; Maintenance check lists;
Normal maintenance
 Visual check of jack foot switches, boom switch and connection wires.
 Check of power supply to verify it is correct.
 Check of the equipment correct operation, by simulating a fault condition and correspondent
resetting. See "Means for easy and safe trouble shooting"
 Check correct operation of the boom switch.
Should special maintenance be required please observe the following precautions.

Cut off power supply before every check or replacement.

Do not weld on machine structure before removing power supply (positive and negative) and
detaching boxes from vehicle frame or possible connections towards vehicle frame.

Provide suitable mechanical protections for connection wires, paying particular attention for
transducers.

Do not place board, transducers or cabling close to sources of heat, electromagnetic interferences
or power transmissions.
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English/USA – 02/17