Reference: C15 part numbers and modern replacements

[Hanno Spoelstra]

For Chevrolet C15 4x2, pieced together from parts list, info on here, and internet searches.

This is work in progress - if anyone can add to this, please post it here.

[Hanno Spoelstra]

Front wheel cylinder part no. 5300869, diameter 1-1/4"
Rear wheel cylinder part no. 5450071, diameter 1-3/8"

Originally Posted by Grant Bowker

C8, C8A and C15 follow a bit different pattern as they use more Chevrolet parts.
Bsed on parts list 175 dated January 1941 the C8 and C15 use 5300869 for the front, C8 uses 5300866 for the rear while C15 uses 5450071.

The Chevrolet Master Parts List 1928-1949 lists 5300869 as being front 1-1/4", used on all 1936-48 comm. and util. (except DS ES and FS - all 1 ton trucks). 5300866 is listed for 1936-48 comm. rear 1-3/16 and GD, HD, JD, KD, AL, BL (all 3/4 ton trucks with 11' brakes) and 5450071 for 1936-48 rear 1-3/8 GE, HE, JE, KE (all 3/4 ton trucks with 14" brakes), KF, AM, AN, BM, BN, DR, ER, FR (mixture of 3/4 and 1 ton). 1-1/4 seems to be the largest front wheel cylinder Chevrolet used in this period. For 1-1/2 and 2 ton utility (includes truck and school bus, both regular and COE cabs, single and dual rear wheel) they used a 1-1/2 rear wheel cylinder assembly 5450553. Original costs were $4.00 or less.

[Hanno Spoelstra]

Originally Posted by Hanno Spoelstra

Rear wheel cylinder part no. 5450071, diameter 1-3/8"

Suppliers of new replacement parts:

• Dorman W4358 (cross reference for part no. 5450071 and 5450565): https://www.dormanproducts.com/p-19418-w4358.aspx
• Chevs of the 40s. "Item # 5450071 37-52": https://www.chevsofthe40s.com/detail...h_14_Drum.html

Edited to add - note: https://www.finditparts.com/products...4/dorman-w4358 lists the following Part Interchanges:

• General Motors 5450071
• General Motors 5450565
• Centric Parts 134.80027
• Wagner Brake F4358
• Aimco W906010
• Coni-Seal WC257460
• Raybestos Brakes WC4358
• Wagner Brake WC4358

[Hanno Spoelstra]

Originally Posted by Hanno Spoelstra

Front wheel cylinder part no. 5300869, diameter 1-1/4"

New replacement part:

• Chevs of the 40s, "Item # 5300869 36^52": https://www.chevsofthe40s.com/detail...on_112ton.html

I found that front cylinders can still be had NOS - this brake cylinder is used by the U.S. Chevrolet G085 1.5-ton truck:

• Jeepest, France: https://jeepest.com/gb/vehicule-chev...rolet-nos.html
• Ruud Moors, The Netherlands: https://www.generaaltjes.nl/Adverten...-remonderdelen | https://www.generaaltjes.nl/Adverteerder/2185