The terminology in Sumner manuals isn't standardized across distributors and trade slang — what one tech calls a "carriage" another calls a "fork frame." This glossary is the field-manual canon.
A
Aircraft Cable
Galvanized steel wire rope used for the main lift cable on Sumner material lifts. Specified by diameter — Sumner uses 1/8″ (3.2 mm) cable on the GH-5T-equipped lifts and on the Series 2300, and 7/32″ (5.5 mm) cable on the MX-equipped 2118 and Series 2000. Industry-standard construction is 7×19 for this diameter range, but the construction is not specified in Sumner's customer-facing copy — verify with calipers, not by eye.
Anchor Clip (Cable Clip)
Drop-forged U-shaped clamp used to secure the end of a wire rope after it has been routed through a thimble. Sumner lifts use one or two clips at the carriage termination. The saddle of the clip must always sit on the live (load-bearing) side of the cable — "never saddle a dead horse."
B
Brake Disc (Friction Pad)
The fiber disc inside the winch that holds the load when the operator stops cranking. Asbestos-free in current-production Sumner winches. Glazes with heat over time; light glaze can be sanded off, heavy glaze or contamination requires replacement.
C
Carriage
The welded-steel assembly that rides up and down the inner mast and supports the forks. Contains four sealed-bearing rollers that contact the mast and the attachment point for the cable terminal.
Caster
A wheel-and-swivel assembly bolted to the lift's base. Sumner uses 5" casters on contractor-class lifts and 8" casters on the Roust-A-Bout. Most current production casters are dual-locking — both the wheel rotation and the swivel direction can be locked independently.
Crank Handle
The hand-powered input to the winch. On most Sumner lifts, removable and stowed on the lower mast bracket when not in use. The 4-speed Roust-A-Bout uses a fixed handle with a shifter.
D
Decal
The vinyl labels affixed to the lift conveying capacity, warnings, instructions, and the maintenance record. OSHA-required to remain legible — illegible decals can fail an inspection. Replaced as a set per series.
Detent
A spring-loaded engagement (typically a ball or pin in a hole) that holds a mechanism at a defined position. The Series 2300's tilt-head detent locks the cradle at 0°, 30°, and 65°.
F
Fork (Reversible)
Pair of formed-steel tines that carry the load. Sumner forks are reversible — they invert via a pivot pin so you can lift either from below the carriage (standard) or from above it (e.g., to set ductwork into a ceiling).
L
LOTO (Lockout / Tagout)
The OSHA-defined procedure for placing a machine in a known-safe state before service. For hand-cranked Sumner lifts, LOTO is implemented by tagging the winch handle and physically blocking the carriage rather than electrical disconnect.
M
Mast
The vertical telescoping structure of the lift. Built from extruded aluminum sections (typically two stages on Series 2400 and 2300; three on taller variants). Inner sections nest inside outer sections, sliding on nylon pads.
MX Winch
Sumner's current-production self-locking worm-gear winch. Replaces the older GH-5T on most modern lifts. Sealed unit — Sumner intends it to be replaced as an assembly rather than rebuilt.
O
Outrigger (Stabilizer Leg)
Fold-out leg that extends laterally from the lift's base to widen the footprint and improve stability. Standard on Series 2118, 2124, and most Roust-A-Bout configurations. Latches and feet are field-replaceable.
P
Pawl (Ratchet Pawl)
Spring-loaded finger that engages the teeth of the ratchet wheel inside the winch. Provides the audible "click" on raise and prevents back-drive when the operator releases the handle. Faint click = weak pawl; replace at any sign of wear.
Pulley Guard
Sheet-steel cover at the top of the mast that captures the cable in the sheave groove and prevents jump-out under shock load. On Series 2400, expanded into a 360° head guard that also protects the cable from snagging on overhead obstacles.
R
Ratchet Wheel
The toothed wheel inside the winch that the pawl engages. Directional — the engagement faces of the teeth must point in the direction shown in the operator's manual. Reversed installation will cause the winch to free-spool under load.
Roust-A-Bout
Sumner's heavy-duty industrial lift. Dual parallel masts, dual independent winches (one for load, one for mast), 4-speed load winch, 1,500 lb capacity. Designed for one operator to position pipe and heavy equipment in tight spaces.
S
Sheave (Pulley)
Grooved wheel at the top of the mast that routes the lift cable. Sealed bearing. A grooved or sharp-edged sheave will fray a brand-new cable in days — always inspect at every cable change.
Slide Pad
Nylon (acetal) wear pad between the inner and outer mast sections. Allows the mast to telescope smoothly without metal-on-metal contact. As pads wear, the mast develops side play at full extension.
T
Thimble
Forged-steel teardrop insert that lines the cable's loop where it terminates at the carriage. Prevents the cable from kinking against itself at the attachment point.
Tilt Head (Cradle)
Series-2300-only. The fork frame pivots from horizontal to up to 65° from vertical, allowing a drywall sheet to be loaded flat and rolled into ceiling position.
W
Winch
The hand-cranked mechanism that raises and lowers the cable. Self-locking by way of a worm gear and a ratchet/brake assembly. Sumner uses the MX winch on current production and the older GH-5T on legacy units.
Worm Gear
The high-ratio gear inside the winch. The worm-and-wheel arrangement is mechanically self-locking — the load cannot back-drive the handle. This is what holds the lift up between cranks; the brake disc only catches the residual energy when the operator stops mid-cycle.
Wraps (Drum Wraps)
The number of complete turns of cable around the winch drum at full carriage extension. The minimum is per series: Sumner specifies 4 wraps in the Series 2100 operator's manual and 3 wraps in the Series 2400 operator's manual. Below the spec'd minimum, the cable termination on the drum becomes the load-bearing point. Always verify against the operator's manual matched to your lift's serial range.