Parker Flange Connection Assembly & Installation

Flange Connection Advantages

Large threaded port connections, such as SAE straight thread, require very high torque to assemble. This makes assembly very difficult, especially where wrench clearance is limited. Flange connections solve this problem by dividing the hydraulic load among four bolts each requiring much less torque, smaller wrenches and smaller wrench clearance.

6 Steps of Proper Flange Port Assembly

 Steps to properly assemble the flange port clamping bolts:
  1. Inspect components to ensure that male and female port threads and sealing surfaces are free of burrs, nicks and scratches, or any foreign material
  2. Lubricate the O-ring
  3. Position flange and clamp halves
  4. Place lock washers on bolts and insert through clamp halves
  5. Hand tighten bolts
  6. Torque bolts in diagonal sequence in small increments to the appropriate torque level* - refer to the figure and tables on this page
* In general, torque values for soft metal ports/manifolds (such as aluminum block) are 66% of torque specified in the tables on this page.

Flange Bolt Tightening Sequence

Flange Bolt Tightening Sequence

 

CODE 61 FLANGE RECOMMENDED BOLT TORQUE VALUES
Size
(in)		 Inch Bolt
J518		 Torque
+10% -0
(ft-lb)		 Metric Bolt
ISO 6162		 Torque
+10% -0
(N-m)
 1/2 5/16 - 18 17 M8 24
 3/4 3/8 - 16 31 M10 50
1    3/8 - 16 31 M10 50
1 1/4 7/16 - 14 52 M10 50
1 1/2 1/2 - 13 77 M12 92
2    1/2 - 13 77 M12* 92
2 1/2 1/2 - 13 77 M12 92
3    5/8 - 11 155 M16 210
3 1/2 5/8 - 11 155 M16 210
4    5/8 - 11 155 M16 210
5    5/8 - 11 155 M16 210

 * Does not meet ISO 6162 specifications

 

CODE 62 FLANGE RECOMMENDED BOLT TORQUE VALUES
Size
(in)		 Inch Bolt
J518		 Torque
+10% -0
(ft-lb)		 Metric Bolt
ISO 6162
(mm)		 Torque
+10% -0
N-m
 1/2 5/16 - 18 17 M8 24
 3/4 3/8 - 16 31 M10 50
1    7/16 - 14 52 M12 92
1 1/4 1/2 - 13 77 M14* 130
1 1/2 5/8 - 11 155 M16 210
2    3/4 - 10 265 M20 400

* Does not meet ISO 6162 specifications

 

HYDRAULIC FLANGE RECOMMENDED BOLT TORQUE VALUES
Socket Screw Bolt Circle
(LK)		 Socket
Head Cap
Screws		 Torque
N-m
LK35 M6 10
LK40 M6 10
LK55 M8 25

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