Thursday, 12 September 2013

Rusty anti-reverse on a Speedmaster

This Shimano Speedmaster's been pimped with speedy hybrid ceramic bearings and recently been used offshore for jigging without much fuss except for a weird rough and grinding feel while cranking.

A quick check by popping open the brake side cover reveals the spool support hybrid ceramics to be in excellent condition. Unscrewing the spool tension cap on the crank handle side also reveals a speedy clean hybrid ceramics. Pop the entire spool out of the body and gave it a few cranks to reveal that the roughness comes from within the inner works of the crank case.
Rusty one-way bearing (anti-reverse). Looks nasty, some damages done but not critical.
It didn't take long to discover that the one-way bearing's probably exposed to salt water for a tad too long. These bearings are generally lubed with light one-way bearing oil and if they are not well taken care of and regularly checked and serviced, this is the outcome.

Upon removing the phenolic resin cage, the roller pins should fall off quite easily. In this case, rust is holding them in the cage. Even the steel outer ring (steel ring in the crank case body) shows some serious damages are about to go deep.
Damage assessment can only be confirmed after thoroughly cleaning of rust and gunk collected over time. A combination of lubricant, rust remover and contact cleaners were used to flush out these nasty rusty bits to reveal an almost new bearing.

Almost new roller pins with signs of typical wear, phenolic cage is like new, crank shaft sleeve is almost new with slight signs of uneven wear.

The outer ring didn't like the rust that much as there was initial signs of deep corrosion if it were to be left un-serviced longer. Note the dark patchy stains on the left most grove.

Fitting the roller pins back into the phenolic cage was a tricky affair as it keeps dropping out and getting stuck onto greasy patches around the crank case. Grease is a big NO-NO for one-way bearings and has to be cleaned before assembly. Shown here fully lubed with one-way bearing oil.
Assembly was tricky with the tiny pins falling off the cage like rice choc chips. Upon assembly, ensure that there's proper lubrication with quality one-way bearing oil. Take extra care not to get any grease into the bearings. Give it a few rotation to fully lube the bearing and try it out on the crank to see if it does stop any reverse crank with little to no back play.

Good thing that this is an early detection, could have avoided some deep corrosion if it were to be serviced sooner. The bearings worked fine with no back play shows that the damages didn't affect it's function. With this discovery, prevention is key by packing in some salt water grease around the star drag screw system where I suspect salt water can seep through. Although not 100%, little TLC does go a long way for you to enjoy fishing with minimal interruption and prolonged lifespan of your gear, any gear really.

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