Komatsu D375A-8, Operation & Maintenance Manual

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NOTICE
After changing the Non-Amine Engine Coolant (AF-NAC), the coolant level of the reservoir tank may
largely decrease as time passes.
If the machine is operated while the coolant level is low, serious failures such as breakage of EGR
cooler and seizure of the engine inside may be caused. Especially before starting the engine on the
next day of changing the coolant, perform the procedure in “METHOD FOR CHECKING COOLANT
LEVEL, ADDING COOLANT”.
15. Tighten the cap (7).
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.
When clearance (a) between the bar and grouser is 20 to
30 mm at the center, the tension is in the standard range.
If the track tension is not in the standard range, adjust it.
METHOD FOR ADJUSTING
k k
WARNING
Never loosen the plug (4) more than 1 turn.
If the plug is loosened more than 1 turn, there is a danger
that the plug (4) flies out under the high internal pressure
of the grease.
Never loosen any part other than the plug (4). Do not turn
your face toward the direction that the grease fitting is in-
stalled.
If the track tension cannot be loosened by the above pro-
cedure, ask your Komatsu distributor for repair.
METHOD FOR INCREASING TRACK TENSION
NOTICE
• When removing the cover (2), be careful not to let dirt in.
• Take care not to damage the safety label stuck to the back of cover (2).
Prepare a grease pump.
MAINTENANCE MAINTENANCE PROCEDURE
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