Greasing a Harrington TF2/TS2 Chain Hoist Trolley the Right Way

Picture a maintenance tech on a rolling ladder, grease gun in one hand, rag in the other, reaching for the trolley wheel bearing that has been chirping since Tuesday's shift. That reach is the mistake this article is built around. Everything here applies to one piece of equipment: the Harrington TF2/TS2 chain hoist trolley, as described in its own manual, and none of it carries to another make without checking that model's manual first.

On the TF2/TS2, the lubrication section settles the question in one line: trolley wheel bearings are outside the grease schedule entirely, and a worn or damaged bearing is a replacement item. That line splits the maintenance plan into two halves that are easy to treat as one. The gears, the pinion, the suspension pins and shafts are wear surfaces that expect fresh grease on a schedule. The wheel bearings and the running surfaces of the track wheels and the beam are the opposite: they are not lubrication points, and grease on the running surfaces is a defect. A shop that only remembers the three-month gear greasing still ends up with the failures, because the failures sit in the half nobody wrote on the wall.

Three Grease Points and One You Leave Alone

The lubricant is settled: NLGI #2 or an equivalent grease for the trolley's lubricated components. What varies is which part and how often. Three items take grease on a schedule, and a fourth item on the same assembly is explicitly off the list.

The track wheel gears and the hand wheel output pinion get cleaned and re-greased every three months, with heavier usage or severe conditions calling for more frequent service. Cleaning first is the step techs skip. Packing fresh grease over old grease that has collected grit turns the gear teeth into a lapping surface, and the wear you were trying to prevent arrives sooner.

Suspension pins, bolts and shafts sit on a different clock: at least twice per year for normal usage, more often under heavy or severe conditions. The 'at least' is doing work there. Twice a year is a floor set for a trolley in ordinary service, not a ceiling for one that runs two shifts. These are the joints carrying the load path from the beam down into the hoist, and a dry pin shows up as sloppy travel and uneven wheel loading well before anything fails outright.

Then the exclusion. Trolley wheel bearings are not a grease point. No interval, no grease type, no repack procedure — replacement is the only maintenance action named for them when they are worn or damaged.

Two prohibitions ride along with the schedule, and both are easy to break while trying to be thorough. Do not use an excessive amount of grease. And keep grease off the running surfaces of the track wheels and the beam. Those are written as defects, not preferences: a trolley that leaves a PM with grease on the flange has been made worse.

Why Greasing the Trolley Wheel Bearings Backfires

This is where the money goes, and it is a two-word problem.

You cannot grease a worn bearing back into service.

The gun goes on, the squeak goes quiet for a while, and the bearing that was already failing keeps failing under a fresh coat. What the tech bought was silence, not life. The noise moved out of the audible column and into the invisible one.

The split Harrington draws is between a wear surface and a consumable. A gear train is a wear surface: metal sliding on metal under load, old grease pushed out of the mesh, fresh grease pushed back in. The wheel bearing on this model is treated as a replace-only item: not a lubrication point, but a part to be replaced as a whole when worn or damaged. Adding grease to it does not restore a pitted raceway or a worn ball set. It adds a place for grit to stick and gives everyone a reason to believe the problem is handled.

The running surfaces carry the second half of the same idea. Gears and the track wheel running surface are separate items in the schedule, and the running surface gets no grease at all. A track wheel rolls on the beam flange; what it needs there is rolling contact, not a lubricated film. Grease on that flange collects aisle dust and turns into a paste that changes how the wheel tracks, and it makes the running surface harder to keep clean.

That is why the grease-gun move costs more than it looks. The damage is not the grease itself. It is the PM window spent on the one component that was never going to respond, while the gear cleaning and pin greasing that would have helped got skipped because the trolley had already been 'done.'

Setting Your Grease Interval for Heavy Use

The baseline and the direction of adjustment come in the same sentence, which is more useful than a fixed table. Three months for gears and pinion, twice a year for pins, bolts and shafts, and in both cases more frequently for heavier usage or severe conditions. What is not given is a number for what counts as heavy. That call belongs to the shop, and the defensible way to make it is to shorten the interval deliberately, record why, and let inspection findings move it from there.

If the trolley runs more than one shift a day, or hangs in abrasive dust, heat, or washdown mist, go with a shorter interval for both the gears and the pins, and write the new dates where the tech will see them. The effect is that the gear teeth see fresh grease before the old film is pushed out of the mesh, and the pins are less likely to sit dry through a busy quarter.

If the trolley sees light, intermittent use — a few lifts a week on a clean indoor beam — skip the urge to grease more often than the baseline. Extra grease on a low-duty unit is not free insurance. The trade-off of a tighter schedule is real: more PM downtime, and more chances to over-pack a gear set the schedule already warns against over-filling.

The other half of that call is inspection, and it is the half that gets dropped. The trolley may require more frequent lubrication, and the same instructions call for frequent and regular inspection of the unit's condition and operation. A shorter grease interval with no look at the teeth, the pins and the wheel condition just means servicing blind more often. The interval sets the visit. The inspection decides whether the interval was right.

Outdoor, Salt Air, and Humidity Change the Schedule

Outdoor installations carry a requirement rather than a recommendation. For trolley and hoist installations that are outdoors, the trolley and hoist must be covered and protected from the weather when not in use. Both of them, because the trolley is the part carrying the exposed gear train and the running surfaces, and it is the part a cover thrown over the hoist body leaves out.

The reason sits in the same section. Where salt air and high humidity are present, the possibility of corrosion on trolley components increases. Corrosion on a gear tooth is a change in geometry. Corrosion on a suspension pin is lost section on a load path. Neither is fixed by adding grease on top of it.

If the trolley hangs on an outdoor beam, under a canopy at a dock door, or anywhere within reach of coastal air, go with a cover as a between-shift habit and treat inspection as the primary control rather than the lubrication schedule. If it lives indoors on a dry beam, skip the cover and the extra greasing and stay on the baseline.

The trade-off is a handling step every shift. Someone has to put the cover on and take it off, and on a busy dock that step is the first one dropped when the truck line backs up. Leaving the unit exposed is not the neutral option either: it opens the corrosion path named directly in section 6.3, on a trolley whose bearings are not a grease point and whose gears can only be cleaned, inspected and re-greased.

Making the Bearing Replace-or-Keep Call

Suppose a wheel bearing comes up suspect — a noise on travel, a wheel that drags, or visible damage that someone reports. The rule is short. Trolley wheel bearings do not need to be lubricated and must be replaced if worn or damaged. There is no repack or top-up in the schedule; worn or damaged means replacement.

If a bearing is confirmed worn or damaged, go with replacement using the correct bearing for the model. If wear is suspected but nobody has established it, the trade-off is between pulling the trolley out of service for a bearing set and continuing to run a component whose condition nobody has verified. That is a judgment for the site to make with its own risk assessment and the manufacturer's guidance, not something this manual settles.

What the TF2/TS2 instructions do not provide is a wear limit or a step-by-step method for judging a bearing. So there is no number to quote here and no procedure to hand a tech as though it came from Harrington. The criterion has to come from your own copy of those instructions or from the supplier who sells you the bearing. What can be done before the call has to be made is to have the replacement identified — the correct bearing for the model, on the shelf or one order away. A trolley sitting idle while a part is on order is a worse position than the bearing problem itself.

Turning the Manual Into a One-Page Lube Card

All of it collapses into a card small enough to tape inside the maintenance cabinet door. Five lines, each one tied to the failure it removes.

Line one: track wheel gears and hand wheel output pinion, cleaned and re-greased with NLGI #2 or equivalent, every three months, sooner for heavy or severe service. It removes the dry, grit-packed gear mesh that shows up as hard travel and a hand chain that suddenly wants two hands.

Line two: suspension pins, bolts and shafts, greased at least twice a year, sooner for heavy or severe service. It removes the dry load path — sloppy travel, uneven wheel loading, and slow wear nobody notices until a pin is out.

Line three: wheel bearings, no grease, replace if worn or damaged. It removes the most expensive habit on the list, the one where a PM window goes to a part that was never going to respond.

Line four: no excess grease, nothing on the track wheel or beam running surfaces. It removes the self-inflicted defect — a greased flange picking up aisle grit and a running surface that then needs cleaning instead of greasing.

Line five: outdoor units covered when idle, and a regular inspection rhythm whatever the interval says. It removes the corrosion path and the blind-servicing problem in one line.

For the procurement reader, the card answers a stocking question too. The consumable this schedule actually drives is the wheel bearing, not the grease: several trolleys in one building will go through bearings on a timeline set by wear, while one container of NLGI #2 can serve many quarterly services. The other question worth putting to the supplier is which bearing fits the trolley you own. That is a fact about your model, and it belongs on the card next to the word replace rather than in a search after the trolley has already come off the beam.

This is not for you if your trolley is a different make or model and you have not opened its manual — the replace-only bearing rule belongs to the TF2/TS2, and a rule like that does not transfer across designs, so carrying this card to another trolley is how a shop ends up with the wrong habit in writing. It is for the shop running a TF2/TS2 that wants the schedule off a long PDF and onto something a shift tech can act on. Write those lines, get the bearing part number beside them, and do it before the next PM shift starts.