Figure 149 - Suction Housing Torque Pattern - Danfoss Turbocor VTT Series Service Manual

Figure 149 - Suction Housing
Torque Pattern
Compressor Components
27. Move from corner to corner (four (4) positions 90° apart), moving 180° then 90° and tighten
these four (4) screws ONLY two (2) turns each, until those four (4) screws have seated the Suction
Housing against the Volute. Performing this tightening sequence prevents damage to the
O-Ring.
28. Remove the nylon shaft protector and cap.
29. Tighten all remaining screws until seated and then, using the pattern in Figure 149 (Suction
Housing Torque Pattern), torque the fasteners in two (2) stages.
• Stage 1: Tighten to 35 Nm (26 ft.lb.)
• Stage 2: Tighten to a final torque of 70 Nm (52 ft.lb.)
16
7
14
4
12
6
30. Remove the Compressor motor housing support.
31. Install the IFV Assembly and finger-tighten all screws evenly. Torque to specification.
32. Remove the three (3) guide pins previously inserted in the three (3) holes of the Axial Bearing
Assembly.
33. Verify all contact surfaces are clean and dry. If not, clean with a lint-free cloth.
34. Apply Super-O-Lube to the new End Cap O-ring and then fit it into the O-ring groove.
35. Insert 3" guide screws into the 10 and 2 o'clock position.
36. Gently slide the End Cap into the Compressor housing.
37. Assemble all 12 of the M12x55 screws with the flat and lock washers.
38. Insert the screws in the available locations.
39. Remove the two (2) guide screws and insert the remaining screws.
40. Finger-tighten all 12 screws and ensure that the End Cap is seated evenly into the Compressor
housing.
41. Tighten the 12 M5 screws in a crisscross pattern in two (2) stages.
• Stage 1: Tighten to 35 Nm (25.8 ft.lb.)
• Stage 2: Tighten to a final torque of 70 Nm (52 ft.lb.)
42. Install the Service Side Cover.
43. Connect the motor power cables.
44. Install the three (3) M10 nuts and washers on the studs above the copper spacers and power
cables, then torque to specification.
45. Install the Motor Power Cover.
9
1
5
11
8
15
2
10
3
13
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