Varco HT-Tong HT100, User Manual

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3
Maintenance
HT-Tong
3-15
Maximum allowable wear to maintain 100% torque rating
Shop repairs
Changing dies/inserts
Procedure
1. Remove the retaining pins by taking out the cotter pin
2. A tong die slot conditioner and die driver can be used to drive the dies out and
recondition the die slots.
3. After replacing the inserts, the retaining pins with the cotter pins shall be reinstalled.
Tong type Dimension A Dimension B
Maximum clearance
(inch) Maximum clearance
(inch)
HT 200 0.045 0.035
HT 100 0.035 0.035
HT 65 0.035 0.035
HT 55 0.035 0.035
HT 35 0.030 0.035
HT 14 0.030 0.035
HT 50 0.025 0.035
!
CAUTION: Wear eye protection when removing or
replacing inserts to protect against chip fragments
A
A
A
A
B