THE MANTL PR-LOCK IS A 
VITAL
ACCESSORY 
THAT CAN SUPPORT
AXIAL ROD 
WEIGHT DURING
MAINTENANCE SHUTDOWNS
• Support weight of the rods either with the surface
drive clamp on the drivehead, f lushby or service rig.
• Slowly release torque by unscrewing the stems.
• Back out until the stems reach resistance.
TO 
DISENGAGE 
THE 
PR-LOCK
• Slowly release the weight of the rods on to the Support 
Clamp checking for any slippage of the polished rod.
• The support clamp relies on friction between the inserts 
and polished rod.
 If the polished slips when the inserts are
engaged,
 i
t may cause damage,
 reduci
ng the hol
di
ng strength.
• The support clamps or plate should be returned to 
MANTL 
MANTL for service.
TO 
ENGAGE 
THE 
PR-LOCK
• SCREW 
IN 
ALL 
STEMS 
EQUALLY
MEASURE HOW FAR EACH STEM STICKS OUT
TO ENSURE THEY 
ARE EQUALLY SCREWED IN
• APPLY 
350 
FT/LBS 
AT 
EACH 
STEM 
- 
MAXIMUM 
HOLDING 
CAPACITY 
WILL 
BE 
10 
TONS
• 3 
1/8 
3000 
R31/1.
25PR
POLISHROD 
LOCK 
OUT
• POSITION 
CLAMP 
BETWEEN 
STUFFING 
BOX 
AND 
FLOW-TEE
• INSTALL 
SURFACE 
DRIVE
• TIGHTEN 
STUD 
BOLTS 
IN 
A 
STAR 
PATTERN 
AS 
NORMAL
INSTALLATION 
PROCEDURE
Mi
ni
mum 
hei
ght 
added 
to 
wel
l
head
Wel
l
head 
- 
val
ves,
 
fi
tti
ngs,
 
remai
n 
unchanged
Reduce 
servi
ce 
costs 
to 
seal
 
and 
dri
ve
Increased 
safety 
duri
ng 
removal
PR-LOCK
July 16, 2025

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