Spline, lining, cover load and actuation before you order
A replacement clutch is specified from the flywheel, the spline, the cover load and the actuation — not from the tractor colour on the bonnet. This pillar is the place to start when the pedal feels wrong, the PTO chatters or the old driven plate is on the bench. The cluster articles cover identification, failure symptoms, installation mistakes and when to replace rather than adjust.
A 330 mm pack is still three SKUs: disc, cover and release bearing. Compare SRC-CL-D330, SRC-CL-C330 and SRC-CL-RB28 before you order only the plate that looked worn.
What you are actually replacing
Cover assembly, driven plate (or plates), release bearing and, often, the flywheel surface travel together. Replacing only the plate against a glazed flywheel or a tired cover is how the next slip appears in a few hundred hours. Dual-plate and organic versus cerametallic facings are duty choices: a loader that reverse-shuttles all day is not the same clutch as a road-tractor that sees long PTO hours. Match the facing and damper to the work, not to the cheapest box on the shelf.
Identity is stamped, not guessed
Hub spline count and diameter, lining outside diameter, and the cover casting or tag number identify the unit. Two clutches can share a diameter and not share a spline. Write the numbers before the assembly is stripped past recognition. If the machine is listed on the clutch category, start there; if it is not, the OEM mark plus make and model are enough to quote. Do not order from a photo of the cover springs.
Actuation and the rest of the driveline
Hydraulic, cable or mechanical release must match the tractor. A slave cylinder that does not fully disengage will burn a new plate as surely as a mis-specified facing. Check free play, fluid condition and fork wear before you blame the clutch you have not yet fitted. Installation mistakes — dry splines, missing alignment tool, wrong flywheel bolts — are covered in the cluster, because they look like 'a bad clutch' a week later.
- Record spline, lining OD and cover / OEM numbers before strip-down
- Decide facing and damper from duty, not from price alone
- Inspect flywheel, release bearing and actuation with the clutch
- Quote from SEROC with make, model and the stamped numbers
What to send with the first email
Spline count and major diameter, lining outside diameter, cover or OEM tag, single versus dual plate, facing material, and whether actuation is hydraulic, cable or mechanical. Add make, model and whether this is the travel clutch or a separate PTO pack. If the tractor reverse-shuttles all day, say so — facing and damper change with that duty even when the spline does not. A photo of the cover springs is optional; the numbers are not.
PTO packs versus the travel clutch
Some tractors hide a PTO clutch behind the gearbox. Mixing that number with the travel clutch is a classic store-room error. A complaint that the PTO will not stay engaged is not automatically a bellhousing strip. Confirm which pack you are replacing before anyone walks to the shelf. Dual-plate packs are identified as a pack — do not order a single plate into a two-plate cover because the lining OD looked familiar.
How this sits next to tractor parts
Oil on a facing is a seal diagnosis first. A cover that has lost height will not be saved by a thicker plate. Record hours at replacement so the next failure interval is a number, not a story. Browse clutch by make and model when fits exist; send the stamped numbers when they do not. The tractor-parts pillar sits next to this one for engines and filtration that share the same machine file.
How SEROC quotes a clutch
Send spline, lining OD, cover or OEM tag, plate count, facing, actuation type, make, model and whether this is travel or PTO. Sales will not guess from a cover photograph. If the tractor is listed under clutch, start there and still confirm the stamp — published fit is a shortlist, not a substitute for the numbers. Loader shuttle duty and heavy PTO belong on the same email as the dimensions. Order the release bearing, flywheel bolts and gaskets in the same conversation so the housing is not opened twice. Read identification, symptoms, installation and when-to-replace in that order when the job is already on the bench.
Why a catalogue photo is not a clutch
Cover springs look alike across horsepower bands. Spline, lining OD, hub length and cover load do not. Ordering from a thumbnail is how a plate bolts up and slips in a week, or will not release because the hub never seated. Keep the old unit until the replacement is on the shaft. If sales ask for a second photo, it is because a number is missing — not because the first picture was unclear. Workshops that record spline count at every clutch job spend less time arguing with a parts-book line that was written for a different serial range. The same habit applies if the only published SKU on this site is a heat-shrink sleeve: identity first, shopping second. Use Help Centre specifying questions when you are writing the email.
Related products
