MAGNATRAC MH7000 Operator / Technical Manual page 3

#1 - PERIODIC MAINTENANCE:
Though periodic maintenance is well covered in the Operator's Manual, it seems that some opera-
tors have let some points "slide" and have suffered expensive repairs. In the hopes of saving you
from premature failure in the future, due to forgotten maintenance, the following points are brought
to your attention!
1) The #526 Bushings (steel) which restrains the #525 Torque Arms mounted to the #524 Track Drive
Motors must be replaced before they wear through and damage their mating #202C Pin. [Check
Drawings MH-2 & MH-3].
2) The #536 & 1090 Chains should be checked for proper tensioning. See "DRIVE CHAIN TEN-
SIONING" in Service section of your Operator Manual for complete instructions.
Failure to inspect and properly tension the chains can result in stripped sprocket teeth and exten-
sive repair work.
3) #1210R & #1210L Right & Left Guards, must be periodically removed and cleaned. Located under
the crawler, these guards protect the#1090 Chain from being damaged (see Photo MH-29).
Due to the varied materials your tractor operates in, there is no specific maintenance schedule for
these #1210 Guards. Rather it is up to the operator to gain experience with the use of the Guards
and create his own maintenance schedule...the Guards may require daily removal and cleaning if
the tracks are run all day submerged in mud, or it may be monthly or quarterly maintenance
because your tractor is working in a relatively clean environment like grass.
4) Grease is good. Consistent lubrication of all moving joints will greatly extend the life of your
equipment, with one exception. The #536 & #1090 Drive Chains should not be lubricated with a
thick or sticky lubricant as this will promote the adhesion of abrasive material.
#2 - CRAWLER OPERATION...Uphill and Downhill:
It can not be repeated too often that you must operate your Track Control handles slowly and
smoothly...they control a hydraulic drive system that can produce literally "tons of physical force".
But in addition, the Track Controls can also produce an opposite force or "resistance to move-
ment" when going up and down hills with heavy loads...in other words, they can provide a dynamic
braking action!
Potentially, if you are going downhill with a load that exceeds factory recommendations, you may
find that your "overload" is actually pushing you downhill faster than the crawler's drive system is
propelling you down the hill. Under these circumstances you have basically two steps for safe control
of your crawler:
First, slowly release the Track Controls so that they may go to neutral and provide a dynamic
braking action. Again, it must be emphasized that you must operate your Track Controls
slowly. Remember, you are controlling tons of force, and though significant overload strength
has been built into the Controls, you still can do serious damage to your tractor's hydraulic
drive by "snapping" the Controls into the neutral position. The act of snapping the Controls to
EXAMPLE