Issue 1
Page 18 of 34
Initial Issue 19 December 2017
Engineering Manager
12
On / Off Tracking
ON/OFF TRACK THE MACHINE ONLY AT AN APPROVED ACCESS POINT.
NOTE
– AN APPROVED ACCESS POINT IS ONE OF THE FOLLOWING:
Level crossing.
Yard where surface is level with the rail top.
Proprietary approved track access system with rail shields.
Consolidated ballast to at least the underside of the rail head with rail shields.
THE FOLLOWING HAZARDS SHOULD ALSO BE ADDRESSED:
Cant - not to exceed 150mm.
Gradient - not to exceed 1:25.
Curve radius - not to exceed 60m.
Ballast shoulder - must be low.
Deep cess / soft cess must not be travelled across.
Drainage routes, troughing routes and other services/cables must not be approached.
OHLE, 3rd rail must be where gap exists on both sides.
Power cables.
Care should be taken when on/off tracking with tracked excavators not to damage the railhead,
suitable rail shields should be used.
When on tracking, the rear rail wheels should be aligned to the rail precisely and the bogie
wheels aligned to within 250mm of the rail head. This may take several manoeuvres. The
bogie can then be accurately aligned utilising the tilt and angle blade ram functions. Only once
alignment has been achieved, should the rail gear be deployed.
Do not attempt to manoeuvre the dozer with the crawler tracks, when the rail gear is semi/fully
deployed.
[WARNING]
When on tracking, care must be taken when lowering the bogie onto the rail head to
ensure all four wheels of the trolley contact the rail before the weight of the dozer is exerted onto the
trolley. If the blade is not angled perpendicular with the rail within the float tolerance of the trolley at all
times de-rail may occur and/or severe damage to the bogie may result.