Method For Checking And Adjusting Track Tension - Komatsu D85EX-18 Operation & Maintenance Manual

MAINTENANCE
18. Add Non-Amine Engine Coolant (AF-NAC) to the middle
between FULL and LOW.
19. Stop the engine.
20. After 3 minutes, add Non-Amine Engine Coolant (AF-NAC)
up to the mouth of the coolant filler port.
21. Tighten radiator cap (1).
22. Check the coolant level in reservoir tank (4).
If necessary, add Non-Amine Engine Coolant (AF-NAC).

METHOD FOR CHECKING AND ADJUSTING TRACK TENSION

The wear of the pins and bushings of the undercarriage depends on the working condition and soil conditions.
Check the track tension occasionally and keep it at the standard level.
Perform check and adjustment on a level and firm ground.
METHOD OF CHECKING
1.
Drive the machine forward on a flat place, and stop without
applying the brake.
2.
Place a straight bar between the carrier roller and idler as
shown in the figure.
Check that the clearance (a) between the bar and the
grouser is the standard dimension of tension at the center
of the track.
• Standard dimension of track tension (a)
D85EX: 20 to 30 mm
D85PX: 10 to 15 mm
If the track tension is not in the standard range, adjust it.
METHOD FOR ADJUSTING
k k
Never loosen plug (1) more than 1 turn.
If plug (1) is loosened more than 1 turn, there is a danger
of plug (1) flying out under the high internal pressure of
the grease.
Never loosen any part other than plug (1). Never put your
face in the mounting direction of plug (1).
If the track tension cannot be loosened by the above pro-
cedure, ask your Komatsu distributor for repair.
METHOD FOR INCREASING TRACK TENSION
NOTICE
• The safety indicator is stuck to the back of cover (1). Take care not to damage the safety indicator.
• When removing cover (1), be careful not to let any dirt or soil get in.
Prepare a grease pump.
WARNING
MAINTENANCE PROCEDURE
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