MCCOY KT5500 - 5.6 ADJUSTMENTS

80-0420-23 POWER TONG
Manual № TM12012
Section 5
Page 5.7
©2008-2017 McCoy Global
Maintenance
5.6 ADJUSTMENTS
5.6.1 Brake Band Adjustment
Periodically adjust the brake bands to compensate for brake lining wear, ensuring continued smooth and efficient
jaw cam action. Inadequate cage plate tension will allow the cage plate to rotate with the rotary gear, resulting
in poor gripping of the pipe or casing due to improper “camming” action of the tong jaws. Tightening the brake
band against the cage plates will increase frictional resistance, allowing jaws to cam properly and grip the casing.
Adjust the brake band using the adjustment nut and bolt set as shown in the illustration below, using the following
procedure:
1. Rotate the cage plate until it faces the rear of the tong.
2. Tighten the top and bottom brake bands a quarter turn each. Ensure both brake bands are adjusted
simultaneously and equally.
3. Rotate the cage plate in the make-up direction. If the jaws cam out, the procedure is complete. If jaws do not
cam out, repeat steps 1 & 2.
4. Continue to repeat steps 1 through 3 until the jaws properly cam.
Over-tightening will cause excessive wear to the brake bands. Do not over-tighten brake bands.
!
CAUTION
TOP AND BOTTOM BRAKE BANDS MUST BE ADJUSTED SIMULTANEOUSLY AND EQUALLY.
Illustration 5.6.1: Brake Band Adjustment
BRAKE BAND ADJUSTMENT
BOLT AND NUT
BRAKE BAND ADJUSTMENT
BOLT AND NUT
BRAKE BAND