MEM3007A-Select MaterialsProduct Study Daniel Rea31/10/2017

Westinghouse 26C Automatic Brake Valve Camshaft Assembly

The 26C Automatic Brake Valve can be seen circled in red fitted in an 80 Class Locomotive cab

Number

Name Material Last Process Notes

1 Top Cover Block Grey Cast Iron Sand Cast & Machined

Previous Brazing Repair

2 Emergency Valve Trigger Grey Cast Iron Sand Cast & Machined

3 1, 2 and 3 Cam Wheels Grey Cast Iron Sand Cast & Ground

Previously ground to modified profile

4 Spindle Mild Steel Machined5 Emergency trigger Spring Spring Steel Formed Broken6 Cut out Valve ID Plate Aluminium sheet Punched & Photo

EtchedDouble Sided to display different set up options

7 Cut out valve Eccentric Bronze Machined8 Cut out Valve Spool Stainless Steel Machined9 Cut out Valve Spool Spring Stainless Steel Wound10 3/8” UNC Mounting nuts Mild Steel Forged & Tapped11 Cut out Valve Toggle Cast Brass Machined &

Vulcanised 12 Cut out Valve end Plug Solid drawn Brass

Bar Machined Reversible to restrict

travel of spool 13 Cut out Valve ID Plate screws Mild steel Cold formed 14 Cut out Valve retaining spring clip Stainless steel Cold formed15 Top Cover Block bolts High tensile steel Threads rolled16 O Ring housing seals Neoprene Injection Moulded17 Cam Spindle seal Carbon Ground 18 Housing Aluminium Sand cast &

Machined 19 Plug Brass Machined20 Spool valve Insert Bronze Investment Cast &

bored 21 Spindle Locating Bush Bronze Machined22 Bronze Insert Bronze Machined23 Rear Cover Aluminium Sand Cast24 Diaphragm (Rubber) Neoprene Injection Moulded25 Relay Piston ring Cast Iron Machined26 Circlip Steel Punched27 O Ring Neoprene Injection moulded28 Relay Spindle seal Neoprene Injection moulded29 O Ring Neoprene Injection moulded30 Seal retaining collar Aluminium Punched 31 Relay Piston Bronze Machined32 Spindle Stainless Steel Machined33 Relay Body Aluminium Machined34 Relay Springs Stainless Steel Wound