Door Latch Adjustment; Shifter Detent Force Adjustment - Farr KT5500 Technical Manual

KT5500 5- " T & CLInCHER® B
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2.

Door Latch Adjustment

Normal operation of the tong may cause wear of the door latch, which will cause the door to develop a loose fit at the latch. A
latch cam plate is located at the top face of the door. The cam plate has eight positioning holes located on a 360 degree bolt
circle. The latch cam shaft extends down through the door and is secured at the top by a 3/8" hex head bolt. To make adjust-
ments in door alignment, remove the 3/8" bolt and turn the cam with a wrench. When the door has been adequately aligned,
replace the 3/8" bolt (see illustration next page).
THE DOOR IS AN IMPORTANT PART OF THE STRUCTURAL INTEGRITY OF THE TONG. IT IS
IMPERATIVE TO KEEP A SECURE FIT AT THE DOOR IN ORDER TO MAINTAIN PROPER GEAR
ALIGNMENT, AND TO MINIMIZE THE POSSIBILITY OF DAMAGE TO THE GEAR TRAIN WHEN
OPERATING THE TONG AT SPECIFIED TORQUE. A CLOSED DOOR ALSO ENSURES SAFETY OF
OPERATING PERSONNEL.
3.

Shifter Detent Force Adjustment:

Over time wear to the shifting shaft, wear to the detent ball, and loss of spring tension in the detent spring may result in a loose
or "sloppy" fit within the top shifter bushing. The detent pressure may be increased or otherwise adjusted by loosening the 7/16"
UNF locking jam nut, and turning the 7/16" UNF detent bolt. Should adequate detent action not be achieved, the shifting shaft,
detent ball, or detent spring (or possibly all three) may need to be replaced (see Pp. 5.16 - 5.17).
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Latch Adjustment Cam
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