Equipment reference / GDP3 / GDP4 / no-fork pulley

GDP3 and GDP4 pulleys: cable scope, ratings and conflicting diameter

Compare the supplier's pulley labels and identify the unresolved GDP4 diameter before treating a listing as a selection specification.

US source scopeReference updated 2026-09-13

Identification details & limits

Reference identifier: GDP3 / GDP4 / no-fork pulley. Compare each listed detail with the exact product and the source document. Do not submit a personal serial number or access code to this website.

GAS Hardware source: GDP3 clevis pulleyProduct heading and Description specification rows · checked 2026-09-13 · GAS Hardware
GAS Hardware source: 3in clevis pulley without forkProduct heading and Description specification rows · checked 2026-09-13 · GAS Hardware
GAS Hardware source: GDP4 clevis pulleyProduct heading and Description specification rows · checked 2026-09-13 · GAS Hardware

Identification and scope details from the cited sources; each row retains its source locator.
GDP3 dimensions	The GDP3 heading and set-up agree on a 3-inch pulley. The set-up gives a 0.75-inch depth; the description specifies cast aluminum and 1/8-inch cable. GAS Hardware source: GDP3 clevis pulleyProduct heading and Description specification rows · checked 2026-09-13 · GAS Hardware
GDP3 reported rating	The supplier reports 200 lb at 10,000 cycles and names 7-foot or 8-foot door height. These are source statements, not an independently established installed-door capacity. GAS Hardware source: GDP3 clevis pulleyProduct heading and Description specification rows · checked 2026-09-13 · GAS Hardware
Unnamed no-fork listing	A separate listing explicitly excludes the fork and gives the same 3-inch diameter, 0.75-inch depth, cast aluminum construction, 1/8-inch application and 200-lb/10,000-cycle rating. It does not state GDP3 as its part number. GAS Hardware source: 3in clevis pulley without forkProduct heading and Description specification rows · checked 2026-09-13 · GAS Hardware
GDP4 diameter conflict	The GDP4 title and description say 4 inches, but its set-up row says 3-inch diameter by 0.75-inch depth. The physical diameter is unresolved; neither value is presented as a confirmed specification. GAS Hardware source: GDP4 clevis pulleyProduct heading and Description specification rows · checked 2026-09-13 · GAS Hardware
GDP4 reported scope	The supplier reports 1/8-inch cable, cast aluminum, 7-foot or 8-foot door height and 400 lb at 20,000 cycles. The diameter conflict still prevents a definite dimensional selection. GAS Hardware source: GDP4 clevis pulleyProduct heading and Description specification rows · checked 2026-09-13 · GAS Hardware
Selection boundary	Confirm the exact pulley, fork and mounting dimensions with the supplier or applicable equipment documentation. No capacity multiplication, manufacturer alias, replacement relationship or complete-door fitment is established. GAS Hardware source: GDP4 clevis pulleyProduct heading and Description specification rows · checked 2026-09-13 · GAS Hardware

Sources & review dates

GAS Hardware source: 3in clevis pulley without forkGAS Hardware · US · checked 2026-09-13
GAS Hardware source: GDP3 clevis pulleyGAS Hardware · US · checked 2026-09-13
GAS Hardware source: GDP4 clevis pulleyGAS Hardware · US · checked 2026-09-13

This independent reference preserves the source’s stated scope. It does not report an Anderson installation inspection, product test or safety clearance.

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The cited sources define the product details shown here; comparison does not establish fitment. Anderson’s repair service covers its listed Connecticut communities; this national reference does not imply nationwide service.