9.2　Head Pulley

Ⅰ　Major Items

9.2.1　Assembly of sprockets of head pulley shall meet the requirements of design technical documents.

Quantity checked:All.

Checking method:Check by observation and field tests.Check assembly records.

9.2.2　The spacing of bearing pedestals of head pulleys and axial playing gaps of bearings shall meet the requirements of design technical documents.Head pulley shall be fixed by welding with baffles on both sides of the bearing pedestal after alignment.

Quantity checked:All.

Checking method:Check installation quality records.Check by observation.

Ⅱ　General Items

9.2.3　Bearing pedestal and bearing base，bearing base and traveling grate equipment support shall tightly contact after fastening of bolts.The crammed area shall not exceed 1/3 contact area checked by clearance gauge of 0.05mm.

Quantity checked:All.

Checking method:Check by observation and clearance gauge.

9.2.4　Allowable deviation of head pulley installation shall be in accordance with those specified in Table 9.2.4.Refer to Figure 9.2.4.

Quantity checked:All.

Checking method:Refer to Table 9.2.4.