Rail-Ability Komatsu D41 Series, Operator'S Manual, Page: 27 / 34

Issue 1 Page 27 of 34 Initial Issue 19 December 2017 Engineering Manager
18 Emergency Off Tracking
Emergency off tracking may be necessary during the working lifespan of the machine. It must be
stressed that this is an emergency procedure only and should not be used in the normal cause of
events. If you are asked to off track using this method, at an unprepared location, without suitable
justification you should report to your on call manager and ask his advice before attempting this
manoeuvre. If there is real cause to use this method there are certain procedures that should be
followed:

The off tracking area must be inspected for its suitability as normal.

An area where there are no obstructions should be selected. For example, there should be no
conductor rail present, no high ballast shoulders and no obvious services cables or hazards.

Emergency off tracking must not be carried out on cants.
In the event of a real emergency the procedure for off tracking is as follows:

Approach the off tracking at a safe speed.

Sound the horn to alert personnel at the off tracking area as you approach.

Raise the rail wheels fully. Including the front bogie

Turn the machine keeping the tracks on the rail head

Manoeuvre the machine on the railhead until the machine is perpendicular to the rail

Track the machine clear of the running rail.

When carrying out this operation always follow any hand signals and carry out all movements
smoothly at a safe speed.
[WARNING] When off tracking, care must be taken when the dozer manoeuvres off the rail head.
Make certain that the blade is raised up to the maximum height for travel. If the dozer tips/tilts forward
severely onto the trolley while climbing off the rail head and the weight of the dozer is exerted
excessively onto the trolley severe damage to the bogie may result.
Grounding out the trolley whilst the dozer is travelling off rail may result in severe damage to
the bogie.
19 Rail Lights
Operation of the rail lights is automatically controlled by a direction sensor located at one of the rail
wheels, to provide the correct colour lights according to the Travel direction. The rail master switch
activates the rail marker lighting system. This switch should always be on whenever the machine is on
the track. When the machine is stationary red lights show at both ends. When moving, the white lights
will illuminate and the red lights will be turned off by the system in the direction of travel.
Power for the rail lights is provided by an on-board 24V system. Lamp irons are also provided if the
lighting system fails or if the battery gets discharged.
Battery charging is provided by the machine alternator.