IHI IC75, Operation Manual, Page: 73 / 106

MAINTENANCE
IC75 ENG 4-9
TRACK ADJUSTMENT
Checking tension of the rubber crawlers
1. Place the carrier on a flat and rigid ground.
2. Put a timber of approximately 1.5 meters long on the
rubber crawler shoe above the idle tumbler (1) and
upper roller (2) and check clearance when a person (of
60 kg in weight) gets on the timer at its center.
The proper clearance is 20 to 30 mm.
Tensioning the rubber crawlers
1. Fill grease through the grease nipple (4) of the check
valve (3) until the rubber crawler shoe are tensioned
properly.
2. Rotate the rubber crawlers forward and backward and
check tension. Re-adjust it if necessary.
IMPORTANT
•
Adjust the right and left rubber crawlers evenly.
•
If the rubber crawlers are not tensioned
properly, the cylinders may be defective. Ask
IHI’s sales service dealer for repair services.
Loosening the rubber crawlers
1. Remove dirt and soil from around the idle tumblers.
2. Loosen the check valve until grease is discharged (by a maximum of one turn) little by little.
Do not loosen it when grease is discharged.
3. Rotate the rubber crawlers forward and backward slightly if grease is hardly discharged.
4. Tighten the check valve when the rubber crawlers are tensioned properly.
Tightening torque: 59 to 69 N
⋅
m (6 to 7 kgf
⋅
m)
IMPORTANT
Be careful not to over-tighten the check valve.
5. Rotate the rubber crawlers forward and backward and check tension. Re-adjust it if
necessary.
WARNING
•
When the rubber crawlers are tensioned intensely, the internal pressure in the grease
cylinder is very high. Do not remove any parts before the pressure is zeroed.
•
To relief the pressure, loosen the check valve gradually. Do not loosen it when grease
is discharged. (It should be loosened by a maximum of one turn.)
•
Grease may spout out at high pressure. Never loosen the grease nipple.
•
Do not bring your face or hand close to the check valve during adjustment.