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Related Products: |
EGSA-210, EGSK-201, EGSK-301 |
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Related Documents: |
EZDP-2035 |
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Type: |
Installation |
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Keywords/Labels: |
Shaft Grounding, Connector Plate, Elbow Assemblies, Attachment Arm, Welding Seams |
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Summary: |
Details how to install the attachment arm |
Complete the steps in these sections to install the attachment arm:
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Place the 1/16 in thick rope guide spacer (A) over the shaft (B) (the arrow indicates the shaft rotation direction).
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Set the Shaft Grounding Assembly (C) on the rope guide spacer as shown the following figure. Orient the Shaft Grounding Assembly such that the mid-point of the rope guide is at the 12 o’clock position.
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Temporarily attach the assembly to the shaft using hands, clamps, tape, banding, or a wooden frame.
The location of the connector plate (A) that mounts to the unit may vary, but it must be within 30 inches of the attachment arm connection point (B) on the Shaft Grounding Assembly.
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Using the connector plate as a template, drill and tap four holes (5/16 in-18 x 3/4 in deep) for mounting to the unit.
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Attach the connector plate to the mounting location using the provided 5/16 in-18 x 3/4 in hex bolts and Nordlock washers.
Insert one elbow assembly into the connector plate and one into the adapter located on the Shaft Grounding Assembly. Position the elbow assemblies (A) so they face each other, as shown in the following figure.
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To determine the length of the attachment arm (stainless steel tubing), measure the exact distance between the flanges on each elbow assembly (A), as shown in the following figure.
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Cut the attachment arm to the measured length and install it (B).
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Using a 5/32 in hex key wrench, tighten the three fasteners around the end of each elbow half (A) to 100 in lbs. Use the 5/32 in hex key wrench to tighten the center pivot fastener of each elbow to 70 ft lbs. Do not yet tighten the set screws between the elbows and attachment arm pipe.
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Remove the four hex bolts from the connector plate (B) and the two bolts from the attachment arm adapter connecting to the rope guide. Carefully remove the attachment arm assembly and Shaft Grounding Assembly, while taking care not to disturb the elbow assemblies, as this will cause misalignment.
The attachment arm is made of 300 series stainless steel. TIG welding is the preferred welding method. If a weld filler is needed, AWS E/ER 308, 308L, or 347 are acceptable.
NOTE
The customer must provide a qualified welder to perform support arm welding.
To weld the attachment arm
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Begin by tack or stitch welding at the marks. The goal is a “stitch” or “fuse” weld. No additional welding material needs to be added at this time. The arm joints simply need to be locked in place by the tacks.
CAUTION
If the tacking step is overlooked and the welder commences to weld the seam, the attachment arm positioning will be compromised, resulting in a distorted arm, which is unusable and must be replaced.
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After tack welding, proceed to weld all of the seams as indicated with the red lines shown in the illustration below. Weld both ends and follow accepted welding practices to minimize distortions that would compromise proper alignments.
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Return the fully welded arm to the Cutsforth technician for final assembly on the generator.
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After assembling the attachment arm, place the Shaft Grounding Assembly back onto the shaft, over the rope guide spacer.
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Connect the attachment arm to the Shaft Grounding Assembly by tightening the two screws (A) shown in the following figure. Torque to 110 in lbs.
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Make any needed fine-tuning adjustments to the orientation to the Shaft Grounding Assembly before locking the rope guide ball and socket joint in place by tightening the three 1/4 in-28 socket head cap screws (B) shown in the following figure. Tighten these bolts by first getting each one snug, then torquing each bolt to 110 in lbs.
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Check the gap between the shaft and the contact points on the rope guide to make sure there are no misalignments.
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Torque all four of the 5/16 in-18 x 3/4 in hex bolts (A) with Nordlock washers to 240 in lbs.
