ProFurl NC32

Removing the lower drum from the forestay.

You will remove the forestay attachment and the bolts securing the ProFurl on the forestay to remove the lower unit. Obviously you will have to secure the mast with the jib halyard to a forward point on the deck to support the mast. Also secure the furling  sleeves so they do not slide off the forestay.

  1. Remove the sail
  2. Secure the mast with the jib halyard to the forward deck (use as temporary forestay)
  3. Detach the forestay and secure the furling sleeves – these will slide around when you remove the lower drum from the forestay
  4. Remove bolts retaining ProFurl unit link plates to forestay
  5. Back out the retaining set screws holding the forestay sleeves to the drum
  6. Lower unit should now slide off the forestay. Upper unit will slide off once the lower is removed.

 

Bearing Refit Kit

Parts are available from Mauripro as of 2022. Bearings and oils seals can also be purchased online (see below for links).

Note: the original kit came with only one bearing. The ProFurl NC32 lower and upper units take two stacked bearings (52mm x 40mm x 7mm). Bearing specifications will vary by ProFurl model.

Bearing used to replace on lower unit:

Original rings – new on left the corroded old one on right.

The old rings were replaced with sealed bearings below. The original bearings are not sealed but the unit has upper and lower seals to keep out the water/dust. That works until it doesn’t. I replaced the open bearings with sealed bearings.

 

  • FKG 6808-2RS 40x52x7mm Deep Groove Ball Bearing Double Rubber Seal Bearings Pre-Lubricated 2 Pcs->> LINK

alternative – not sealed:

  • uxcell 6808ZZ Deep Groove Ball Bearings Z2 40mm X 52mm X 7mm Double Shielded Carbon Steel->> LINK

A possible rubber seal replacement – I did not use this but could be an option:

  • uxcell Metric Rotary Shaft Oil Seal 40x52x7mm TC Double Lips Rubber, Black ->> LINK

C-clips to retain the lower unit:

Bolt types on the lower unit assembly

 

Fasteners for the drum (furling line) – 8mm dog point:

Instruction on replacement/installation of bearings and seals.

Video from ProFurl on the unit. (scrub to 00:40 – 1:35)

Roller-furler

 

Instructional video on removal/installation of the bearings/seals on the upper and lower unit.