The new 36254R.S carriage release is used for older T rail chain drive garage door openers.
Use With T Rail Opener Models: ProMax®: PMX 300-IC/A, PMX 500-IC/A, PMX 300-IC/B, PMX 500-IC/B
Use With T Rail Opener Models: IC250, IC250/B, PMX700, PMX1200, GPS700IC, GPS1200IC
Only use this carriage release if your old part numbers are one of the following 36254R.S 36197A, 21784R, 20438R. Includes carriage release only.
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