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Section Contents

3.17

BEST BY FARR

14 1/2" Closed Mouth Trailer-Mounted Bucking Unit

Technical Manual

3. GENERAL COMMENTS

a) Position rotary gear in contact with idler gears prior to breaking out joints or collars where high

torques are required.

b) When making-up integral (shouldered) joints, it is essential to make up the last turn of the

threads in low gear. This reduces the tendency of an instant stop or a sudden increase in

torque, which induces extremely high stresses on the gear train.

c) DO NOT employ the “snap break” method of breaking-out joints. By definition, the “snap

break” method is a procedure used by some operators to break-out connections, accom-

plished by leaving slack in the “jaw-pipe” engagement, and then quickly pulling the throttle

valve control lever allowing the tong to snap into its loaded or high torque condition. Although

this method is very effective in breaking out joints, the extremely high stress placed on the

gear train frequently causes gear breakage.

THE “SNAP-BREAK” METHOD IS HAZARDOUS TO OPERATING

PERSONNEL

Setup & Operation

F. EXTREME COLD WEATHER OPERATION PROCEDURES

1) Consult the power unit engine operator’s manual for all cold weather operating procedures and

precautions.

2) Select gear and bearing lubricants that are compatible with expected climatic conditions.

3) Select hydraulic fluid that is compatible with expected climatic conditions.

4) Allow hydraulic fluid to circulate for approximately 20 minutes after starting the power unit, prior to

activating the bypass valve to allow fluid to circulate to tong. If the power unit is equipped with an

oil temperature gauge, ensure that the fluid has reached operating temperature as specified by

hydraulic fluid data sheet.

5) Allow for adequate drying of moisture (prior to lubricating) when cleaning tong parts in cold

weather.

G. RUNNING PIPE

Stabilize and level the bucking unit on a secure surface using the four hydraulic jacks.

ONCE THE TRAILER JACKS HAVE BEEN ADJUSTED, THE ADJUSTMENT

LEVERS MUST BE LOCKED TO PREVENT ACCIDENTAL ADJUSTMENT

OF JACKS.

Ensure both ends of the pipe are supported and not allowed to deviate from the centerline. Excessive

movement as indicated by the arrows in the illustration will cause increased wear on the backup

guides.

(see illustration following page)

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