Frozen Motor..

[rgk]

slew

/slo͞o/

Verb (of a vehicle or person) Turn or slide violently or uncontrollably in a particular direction.

Noun A violent or uncontrollable sliding movement.

[AcWxRadar]

SLEW

transitive verb

1: to turn (as a telescope or a ship's spar) about a fixed point that is usually the axis

Examples of SLEW

1: He slewed the telescope three degrees south.
2: He slewed the satellite dish with the H-H motor using USALS motor control from 97.0°W to 125.0°W.

Just wanted to help you out there.

RADAR

[Cham]

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ADVERTISING BOX

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I had a 9120 apart a while back still works well even at -30 and lower temps. I cleaned out all the old grease and replaced it with Lubriplate formulated for cold temperatures. The grease that was originally installed (applied) seemed to be very thick & sticky even at room temperature, likely fine for warmer climates. In our sub-deep-freeze temperatures it turns into glue.
Of course your issue may be something else electronic rather than mechanical...