Section 9
High Pressure Water System
20412997
8-2012/Rev 12
9-7
Torque Specifications
Table 9-1, Torque Specifications, details the torque specifications and tightening sequences for
the high pressure components and connections.
Table 9-1
Torque Specifications
High Pressure Water System
7/8” Diameter Plunger 1-1/8” Diameter Plunger
Hard Seal End Cap
Jackbolts 6 (7/16”) each 8 (7/16”) each
1st Stage Hand Tight Hand Tight
2nd Stage 20 ft-lbs (27 Nm)
Crossing Pattern*
20 ft-lbs (27 Nm)
Crossing Pattern
3rd Stage 32-35 ft-lbs (43-47 Nm)**
Crossing Pattern
32-35 ft-lbs (43-47 Nm)*
Crossing Pattern
4th Stage 32-35 ft-lbs (43-47 Nm)*
Clockwise Pattern From Bolt 1
32-35 ft-lbs (43-47 Nm)*
Clockwise Pattern From Bolt 1
Socket Wrench Size 3/8 inch 3/8 inch
6-Bolt Crossing Pattern 8-Bolt Crossing Pattern
* Note: Crossing Pattern: 1, 2, 3, 4, 5, 6 or 1, 2, 3, 4, 5, 6, 7, 8.
** Note: A maximum torque of 38 ft-lbs (51 Nm) is etched on the hard seal end cap. This represents
the maximum allowable torque, not the recommended torque.
Hydraulic Cylinder Head
Socket Head Screws 8 (M14) each 6 (3/4”) each
Torque 75-80 ft-lbs (102-108 Nm) 170-175 ft-lbs (230-237 Nm)
Hex Key M12 5/8 inch
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