Nissan Micra K11 silhouetteK11

REPAIR FOR COMPONENT PARTS — Mainshaft and Gears (Cont'd) / Inspection / Synchronizers

MT-5018prose procedure
Continued from MT-5017

Mainshaft and Gears (Cont'd)

Mainshaft disassembly (continued)

  1. 4
    Remove snap rings, 3rd gear, 2nd gear, 1st/2nd synchronizer assembly and 1st gear.
    Do not disassemble the synchronizer to avoid ejection of the balls and springs.
    Exploded view of the mainshaft showing (top to bottom) 3rd gear, 2nd gear, 1st/2nd synchroniser assembly, 1st gear, and main shaft sleeve. Snap rings on the left indicate retention points for each gear set.
    NMT078
  2. 5
    Remove mainshaft front bearing.
    Mainshaft mounted vertically on a bearing puller stand; the front bearing is being pressed off the lower end.
    NMT079

INSPECTION

Gears and shafts

Gears and shafts inspection

  1. 1
    Check all gears for excessive wear, chips or cracks; replace if necessary.
  2. 2
    Check shaft for bending, cracks, wear or worn splines; replace if necessary.

Baulk ring

Baulk ring inspection

  1. 1
    Replace baulk ring if found to be deformed, cracked or otherwise damaged excessively.
    Close-up of a baulk-ring tooth segment with two black arrows pointing to chipped/damaged teeth, illustrating an inspection failure mode.
    SMT911

SYNCHRONIZERS

Disassembly

Synchronizers — disassembly

  1. 1
    Disassemble the 1st/2nd synchronizer.
    Exploded view of the 1st/2nd synchronizer assembly: hub, coupling sleeve, three spread/insert springs and three shifting inserts/keys.
    NMT115
Support our work!

Search Manual

Search pages, specs, and procedures