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Track, Adjusting Track Sag: Service Information

This document provides instructions for adjusting the track sag on an EC240B LC Volvo excavator. It includes the following key points: 1. Raise the track using the boom and slew the superstructure to access the track. 2. Measure the track slack in the center of the track frame. 3. To decrease track sag, add grease through the nipple. To increase sag, loosen the valve to drain grease. Adjust according to soil conditions.

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Smolovic Srdjan
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894 views2 pages

Track, Adjusting Track Sag: Service Information

This document provides instructions for adjusting the track sag on an EC240B LC Volvo excavator. It includes the following key points: 1. Raise the track using the boom and slew the superstructure to access the track. 2. Measure the track slack in the center of the track frame. 3. To decrease track sag, add grease through the nipple. To increase sag, loosen the valve to drain grease. Adjust according to soil conditions.

Uploaded by

Smolovic Srdjan
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Service Information

Document Title: Function Group: Information Type: Date:


Track, adjusting track sag Service Information 8/20/2019
Profile:
EC240B LC Volvo

Track, adjusting track sag


Showing Selected Profile

Valid for serial numbers


Model Production site Serial number start Serial number stop
EC240B LC Volvo

1. Slew the superstructure to the side, and raise the track using boom down operation.

Figure 1
Raising the track
2. Slowly turn the track in forward and reverse direction several times. Stop the track while moving in the reverse direction.

Figure 2
Measurement, track slack (A)
3. Measure the track slack at the center of track frame between track shoe and track roller mounting surface.
Figure 3
Track sag, adjusting

A. Valve tightening torque: 68.6 ±2.5 Nm (7 ±0.25 kgf m) (50 ±1.8 lbf ft)
B. Grease nipple
C. Drained through rod hole
D. Screw
E. Brake

A. Tightening torque :

WARNING
High pressure grease in track adjuster cylinder. Do not remove grease fitting or nut and valve assembly to
release grease.

4. To decrease track sag, add multi-purpose grease to track adjuster cylinder through grease nipple using a grease gun
with a maximum capacity 690 bar (10000 psi). To increase track sag, loosen valve assembly one turn so that grease in
the track adjuster cylinder can be drained through rod hole. Tighten the valve assembly when track sag is correct.
NOTE!
If the piston in track adjuster cylinder does not move, replace the valve assembly, repair or replace the cylinder.

5. Adjust the track sag according to soil condition of work site. See the following table.
Track sag according to soil condition

Item Distance (A)


Normal soil See refer to the operator’s manual (track tension checking)
Rocky ground for further operation.

Soft ground (swamp, clay, sandy soil)

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