NPK PH1 Operator's Manual page 59

TORQUE VALUES FOR HAMMER FASTENERS
If hammer bracket fasteners are found to be loose, use the following chart. If repairs
are to be made, see the NPK Hydraulic Hammer Service Manual.
HAMMER BRACKET
MODEL TYPE
PH1 STANDARD
SKID STEER
PH2 STANDARD
HEAVY DUTY
SCALING
SKID STEER
PH3 STANDARD
HEAVY DUTY
PH4 STANDARD
HEAVY DUTY
*Torque hammer bracket bolts using anti-seize compound.
**DO NOT torque adapter bracket bolts using anti-seize compound.
*HAMMER BRACKET
BOLT TORQUE
BOLT
ft/lbs (Nm)
DIA
3/4"-10 280 (378)
3/4"-10 280 (378)
3/4"-10 280 (378)
5/8"-11 150 (203)
5/8"-11 150 (203)
3/4"-10 280 (378)
1"-12 500 (675)
1"-12 500 (675)
1"-12 500 (675)
1"-12 500 (675)
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**ADAPTER BRACKET
BOLT TORQUE
BOLT
ft/lbs (Nm)
DIA
5/8"-11 165 (225)
N/A N/A
5/8"-11 165 (225)
5/8"-11 165 (225)
5/8"-11 165 (225)
N/A N/A
5/8"-11 165 (225)
5/8"-11 165 (225)
5/8"-11 165 (225)
5/8"-11 165 (225)