Hypertherm HyPrecision 50S, Operator'S Manual

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HyPrecision 50S/60S/75S Operator Manual 808690 181
8 – Pump specifications
P
u
mp specificat
ions
Torque values
Fasteners
When installing more than 1 fastener on a part, tighten each fastener in 68 N∙m (50 lbf∙ft) increments using a
repeating cross pattern until the recommended torque is reached.
Because of high forces inside the intensifier, all bolts and cap screws that fasten load-carrying parts are grade 8.
Fasteners that are exposed to cyclic loading also use lock washers. Torque load-carrying fasteners to the
specifications in these tables unless otherwise noted. Torque values can vary depending on thread condition. A
sufficient seal can be made at values much lower than the maximum values shown in the table. Use only enough
torque to make a sufficient seal.
This chart applies to all fasteners used on hydraulic and high-pressure water parts.
Special fasteners
These torque values are for bolts that are coated in antiseize bolt lubricant (white lithium grease).
SAE J518 flange bolts
These torque values are for bolts that are coated in antiseize bolt lubricant (white lithium grease). Lubricate the
O-rings with hydraulic fluid or O-ring lubricant before assembly. To make a good seal, the sealing face must be
parallel to the mating surface and the bolt tension must be even. Align the flange face to the mating surface.
Wrench size N∙m lbf∙ft
High-pressure end cap nut 1-1/2 inch 373 275
Intensifier cap screw 7/8 inch 373 275
Hydraulic fluid tank access cover 15/16 inch 27 20
Proximity switch cap screw 3/16-inch hex 11 8
Indicator pin cap screw 5/32-inch hex 5 4
1/16-inch dash
size
Bolt size
Code 61 grade 8 Code 62 grade 8
N∙m lbf∙ft N∙m lbf∙ft
-08
5/16-28 inch 33 24 33 24
-12 3/8-16 inch 60 44 60 44
-16
3/8-16 inch 60 44 92 68
-20 7/16-14 inch 92 68 150 111
-24
1/2-13 inch 150 111 296 218