J&M 220 Operating And Maintenance Manual - page 47
MODEL 220
HYDRAULIC
IMPACT HAMMER
IV.
MAINTENANCE AND ADJUSTMENTS
R. BOLT TORQUE INFORMATION
The only way to actually tighten high strength bolts is with a torque wrench. Proper
use of the torque wrench is important. To obtain the listed torques, a steady pull
should be exerted to the handle until the desired torque is reached.
The following torque specifications apply to the bolts from the component
assemblies listed. Whenever any of these bolts, are replaced, the given torque
specifications should be adhered to.
LIFTING BALE
Page VIII-6
Item 72
5/8"-11
233 Ft-Lbs (32.2Kg-M)
Item 35
1"-8
1009 Ft-lbs (139.4Kg-M)
RAM ASSEMBLY
Page VIII-8
Item 20
3/4"-10HHCS
275 Ft-Lbs (38Kg-M)
ACTUATOR MOUNTING
Page VIII-9
Item 4
3/4"-10SHCS
417 Ft-Lbs (57.6Kg-M)
ACTUATOR ASSEMBLY
Page VIII-14 & 15
Item 7
1/2"-13
119 Ft-Lbs (16.4Kg-M)
Item 3, 30, 37
3/4"-10
417 Ft-Lbs (16.4Kg-M)
Item 14, 23, 34, 38
1"-8
1009 Ft-Lbs (139.4Kg-M)
IV-14