Dock leveller, seal and bumper service
The door is only half the bay. Levellers, bumpers, shelters and seals fail on their own schedule, and a bay with a good door and a broken leveller is still a bay that’s down. We service dock equipment in the same visit as the door, so one technician covers the whole opening instead of two trades and two invoices.
What do we service at the loading dock?
Mechanical and hydraulic dock levellers: lip and deck operation, hold-down and spring assist, hinge and lip pins, and the safety legs. Dock seals and shelters: torn fabric, compressed foam, damaged frames and head curtains. Dock bumpers: cracked, missing or worn through to the mounting plate, which is where trailer contact starts reaching the wall. Vehicle restraints and dock lights where fitted.
A leveller that hesitates under a forklift, or a seal that has gone flat, usually shows up first as a complaint from the yard rather than a breakdown. Catching it on a scheduled visit is cheaper than the day it stops a trailer.
The door and the dock are one system, and the industry treats them that way: DASMA Technical Data Sheet 182, Technical Considerations for Dock Doors covers how the opening, the leveller and the seal interact.
Source: DASMA Technical Data Sheet #182, Technical Considerations for Dock Doors (PDF). Checked 7 September 2026.How does dock equipment ask for service?
- Leveller doesn’t seat flush on the trailer bed, or hesitates and drops under load
- Lip won’t extend fully, or stays extended after the trailer leaves
- Dock seals torn or compressed flat, letting weather, dust and pests in
- Bumpers cracked or missing, with trailer contact reaching the building face
- Shelter fabric torn at the frame or the head curtain hanging loose
- Pit full of debris, hydraulic fluid on the deck, or a leveller that bangs on contact
What numbers define a working dock bay?
The industry sheet on dock doors sets the frame: openings commonly 8×8 to 10×10 feet, a dock floor about 48 inches above grade to meet trailer beds, duty cycles that can run hourly around the clock, and the operating rule that a dock door should not be opened unless a transport vehicle is parked at the dock, because an open dock door is a four-foot fall onto concrete. Wind and impact requirements for the door itself are set by the local authority having jurisdiction, which is why the same bay can need a different door in Grimsby than it would inland.
Source: DASMA Technical Data Sheet #182, Technical Considerations for Dock Doors (PDF). Checked 7 September 2026.Why is leveller service tied to the manufacturer’s manual?
An honest scope note: DASMA’s technical library covers the dock door in depth, and no equivalent industry sheet exists for levellers, restraints and seals. That equipment is serviced to its manufacturer’s written manual, model by model, which is why our per-bay log records the make and model of every piece of dock equipment rather than treating “the dock” as one thing. It is also why hydraulic work, hold-down adjustment and lip hardware get quoted from the manual’s procedure instead of improvised: the manual is the standard when no broader one exists.
What happens on a dock service visit?
- Door and dock, one callTell us how many bays and what is on them. We inspect the door and the dock equipment on the same visit.
- Function and safety checkLeveller cycle under load, lip travel, hold-down, safety legs, seal and bumper condition, restraint operation.
- Repair or quoteBumpers, seals, lip pins and common leveller hardware are on the truck. Larger leveller work is quoted with a date.
- Per-bay recordEach bay gets its own note, which is the start of a service history for the whole dock.
Dock equipment service is available in Hamilton · Stoney Creek · Burlington · Oakville · Milton · Grimsby · St. Catharines · Niagara Region.