NorthStar RIM Tach
®
1250 Instruction Manual
11 Dynapar (847) 662-2666 17 November 2008
2.2.4 Enclosure Installation
Do not attempt to mount or dismount the enclosure with sensor probe module(s) installed.
Remove all sensor modules until enclosure mounting is complete.
1.
Remove red rubber band from pulse wheel. If test fitting the enclosure, leave rubber band in place until final enclosure
mounting.
2.
Remove enclosure from packaging.
3.
Determine which of two orientations of enclosure is best for this application (Sensor Modules horizontal or vertical).
If mounted horizontally, ensure that the drain hole is at bottom of enclosure. If not, rotate the unit
180°.
5. Place enclosure onto motor C-facing.
Do not damage the pulse wheel when mounting the enclosure. If the pulse wheel assembly is not
far enough down the shaft, continue pushing it on with the enclosure until the enclosure seats.
6. Tap lightly with hand or hammer if needed to make the enclosure slide over motor facing. Make sure clearance holes
remain
aligned.
7. Insert four 0.625”-11 hex cap screws onto the motor enclosure. If the enclosure has not already seated against
the
motor facing, do so by tightening the first bolt and then the bolt on the opposite side. Continue alternating and tightening
until enclosure is seated. Torque all bolts to a nominal 125ft-lbs (see Figure 5).
2.2.5 Pulse Wheel Assembly Axial Position Adjustment
If the pulse wheel is not lined up and no pre-drilled holes are required, use the following procedure to adjust the position of
the pulse wheel assembly. See Figure 4-6.
1.
Slide pulse wheel assembly until the alignment surface of the unit is even with recess in face of enclosure. See Figure 2-
3 for a detailed drawing of the pulse wheel assembly.
2.
Use a straight edge to check it.
3. Loosen two set screws and slide pulse wheel along the shaft until the recess and wheel surfaces are aligned to within
±0.010 inch.
4.
Tighten two set screws to a nominal 70 in-lbs.
If the pulse wheel is not lined up and pre-drilled holes are desired, use the following optional procedure to locate (or
relocate) set screw holes in the shaft.
If pre-drilled screw holes turn out to be incorrectly placed, new screw holes must be drilled. New
holes may be drilled plus or minus the error distance from the old holes.
1.
Leaving one set screw tightened, remove other set screw and use a punch to mark position of set screw hole on shaft.
2.
Replace and tighten set screw. Remove other set screw and use a punch to mark position of that set screw hole on shaft.
3. Remove enclosure and pulse wheel.
4. Use standard ¼” drill to drill a hole that is approximately 0.1” deep from tangent point of shaft (point of first contact of
drill to shaft) to bottom of hole. Do this for both holes.
5.
Reassemble pulse wheel and tighten set screws to a nominal 70 in-lbs.
6.
Reassemble enclosure onto motor facing.
