Komatsu Excavator PC240LC

Lever compressor housing to tighten belt to tightness criteria and tighten lower bolt to hold in position

Check each pulley for damage, wear of the V-groove and wear of the V-belt. Ensure the V-belt is not touching the bottom of the V-groove

Does the belt need replacement?

Replace belt if it has stretched, leaving no allowance for adjustment, or if there is a cut or crack on belt

Readjust the new belt after operating for one hour

Sign off on the compressor belt adjustment

1. Check item: Outside diameter of flange (outside)

2. Check item: Outside diameter of tread

Check item: Clearance between rotor and shaft

Standart Clearance: 0.056 – 0.105

Check item: Clearance between rotor and shaft

Standart Clearance: 0.056 – 0.105

Warning: This procedure requires trained personnel with PPE!

Direction of adjustment screw (3) turn

Enter the number of turns made on the adjustment screw

Locknut tightened to 63.7 ± 9.8 Nm (6.5 ± 1.0 kgm)

Pressure checked after adjustment

Sign off on the oil pressure adjustment

- Check item: Arm counterbalance valve spring

Free length × O.D.: 70.8 × 16.1

Installed load: 192.1 N (19.6 kg)

Installed load: 153.9 N (15.7 kg)

Remedy: Replace spring if any damages or deformations are found