Inches | |
(i) Steam locomotives: | |
(A) Cam type of driving wheel brake | 3 1/2 |
(B) Other types of driving wheel brakes | 6 |
(C) Engine truck brake | 8 |
(D) Engine trailer truck brake | 8 |
(E) Tender brake (truck mounted and tender bed mounted) | 8 |
(F) Tender brake (body mounted) | 9 |
(ii) Locomotives other than steam: | |
(A) Driving wheel brake | 6 |
(B) Swivel type truck brake with brakes on more than one truck operated by one brake cylinder | 7 |
(C) Swivel type truck brake equipped with one brake cylinder | 8 |
(D) Swivel type truck brake equipped with two or more brake cylinders | 6 |
Pounds | |
(1) Locomotives: | |
(i) Minimum brake pipe air pressure: | |
(A) Road Service | 70 |
(B) Switch Service | 60 |
(ii) Minimum differential between brake pipe and main reservoir air pressures, with brake valve in running position | 15 |
(iii) Safety valve for straight air brake | 30-55 30-68 |
(iv) Safety valve for LT, ET, No. 8-EL, No. 14 El, No. 6-DS, No. 6-BL and No. 6-SL equipment | 30-75 |
(v) Safety valve for HSC and No. 24-RL equipment | 30-50 |
(vi) Reducing valve for independent or straight air brake | 50 |
(vii) Self-lapping portion for electro-pneumatic brake (minimum full application pressure) | 30-50 |
(viii) Self-lapping portion for independent air brake (full application pressure) | 40-60 |
(viiii) Reducing valve for air signal | 50 |
(x) Reducing valve for high-speed brake (minimum) | |
(2) Cars: | |
(i) Reducing valve for high-speed brake | 58-62 |
(ii) Safety valve for PS, LN, UC, AML, AMU and AB-1-B air brakes | 58-62 |
(iii) Safety valve for HSC air brake | 58-77 |
(iv) Governor valve for water raising system | 60 |
(v) Reducing valve for water raising system | 20-30 |
49 C.F.R. §232.710