Spicer TPCS Troubleshooting Guide - Manual (Page 69)

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Service Procedures
Hose Selection Chart
Trailer Channel Plumbing Requirements
Notes:
1. Air line sizes shown with an outer diameter
measurement are for DOT approved nylon air brake
tubing meeting SAE J844. Air line sizes shown with
an inner diameter measurement are for DOT
approved reinforced rubber hose meeting SAE
J1402.
2. For Pneumatic Control Unit to Glad Hand plumbing
when using a coiled hose, include the coiled hose
length in the overall measurement. Example: A 22'
coil air hose with a 15' working length is actually 22'
in length.
3. Wire braid hose diameter is inside diameter (I.D.).
Nylon hose diameter is outside diameter (O.D.).
Min. Tank Size Main Run Jounce
(Tractor) PCU to Glad Hand* N/A 16' to 22' 5/8" OD
19' to 25' 13/32" I D
22' to 30' 1/2" OD
Single Trailer (2 to 3 Axles) 1400 in3 35' to 40' 1/2" OD 7' to 9' per axle 5/16" ID Only
(6 gal.) 40' to 50' 5/16" ID 7' to 9' per axle 5/16" ID Only
Dual Trailers (4 to 5 Axles) 2800 in3 60' to 85' 1/2" OD 7' to 9' per axle 5/16" ID Only
(12 gal.) 75' to 100' 5/16" ID 7' to 9' per axle 5/16" ID Only