I took a little suggestive detour with this one. Having just completed the operation described below just before the prompt, it was readily in mind.
“So… you’ll do it?” She looked shyly at the floor before glancing up at him.
He sighed and sat down, spread-legged, opposite her. “Sure. But I warn you, I haven’t done this in a long time.”
She nodded eagerly and sat on her haunches. “That’s OK, I’ve never done it at all.”
“I know. We’ll take it slow at first. Now, first we’ve got to get the shaft good and lubricated…” He squirted some thick fluid from a tube and slathered it on. “That should be good enough… OK, I’m going to insert it; you be ready to guide it in.” He gently inserted the tip, wiggling it slightly, and began to slowly apply pressure.
Her brow furrowed as she concentrated, moving her fingers. “Uh… OK… Aaah, I can feel the tip!”
“Good, good, I’m going to push a little harder… Unf… it should go all the way in now…” He grunted with the effort, leaning into it. The shaft suddenly slid forward as far as it could and she gasped.
“It’s in! We did it!”
“We certainly did. Now, put that nut on it so it doesn’t slide out again.” He stood, wiping the white lithium grease from his hands with a rag, and leaned against the seat of the motorcycle. “Now you ought to be able to do that by yourself next time, but it is easier with two.” He tossed the rag at her playfully. “Now that we’ve got the axle shaft in, we need to put the brakes back on the disc. Torque that nut down good.”