Testing And Adjusting Air Conditioner Compressor Belt Tension - Komatsu PC88MR-10 Shop Manual

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Testing and adjusting air conditioner compressor belt tension

Park the machine on a level ground and

lower the work equipment to the ground.

(PC88MR-K5A0-285-K-00-A)

1. Open the engine hood and remove fan guard

2. Press the belt at the intermediate point between

the fan pulley and compressor pulley with your

finger and measure deflection (a).

Belt pressing force: 60 N {6.1 kg}

Belt deflection: 6 to 9 mm

3. Restore the machine after finishing the test.

(PC88MR-K5A0-27C-K-00-A)

a If the belt deflection is improper, adjust it

according to the following procedure.

1. Loosen mounting bolt (3) and clamping bolt (4)

of bracket (2).

2. Use a bar, etc. to slide bracket (2) and adjust the

belt tension, and tighten clamping bolt (4).

3. Tighten mounting bolt (3) of brackets (2).

a Check each pulley for breakage, wear of the

V-groove, and contact of the V-belt with V-

a If the V-belt is elongated exceeding the

adjustment allowance or it has a cut or a

crack, replace it with a new one.

30 Testing and adjusting

a When the V-belt is replaced, check and

adjust its tension again after running the

engine for an hour.

a After tightening the bolts, check the belt

again for the normal tension according to the

procedure described in the above.

4. Restore the machine after finishing the

Engine and cooling system

(ALL-K5A0-001-K-00-

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