2024 School Bus Catalog

BRAKE DRUMS

Bolt Circle

Bolt Hole Size

Diameter

Brake Surface Pilot Diameter Overall Depth

BRAKE DRUMS

Bolt Circle Bolt Holes Lbs Notes

Brake Surface Dia.

Brake Shoe Width

Pilot

Overall Depth

L/C V/C Part No.

Diameter

WBB WB 65545B WBB WB 51528B WBB WB 55548B

15.00"4.00" 9.04"

8.78″ 11.25″ 10@1"

66 Standard 79 Standard

10 & 11.25 @ 1.28"

15.00″ 4.00″ 15.00″ 4.00″ 15.00″ 4.00″

8.86" 8.86" 8.89"

8.78″ 8.66″

8.78″ 11.25″ 10@1.28" 79Standard

WBB WBB

WB WB

77528B 77528B20

Vortex Pallet-20

8.78″ 11.25″ 10@1.31" 64

WBB WB 55710B WBB WB 65177B WBB WB 55152B WBB WB 52200F ABP AU 151.6705 ABP AU 151.6716 WBB WB 56893F

16.50"5.00" 9.04" 8.78"11.25"10@1.25"121Standard

16.50"5.00" 9.63" 8.78" 11.25″ 10@1"

106 Notched

16.50"6.00" 9.76" 8.78"11.25"10@1.25"108Standard 16.50" 7.00" 9.50" 9.44"11.25"10@0.81" 96 Standard

16.50″ 7.00″ 16.50″ 7.00″

8.74" 10.50″ 12.75″ 5/6@0.78" 124 Standard 8.00" 11.00″ 12.75″ 5/6@0.65" 107 Standard

16.50″ 7.00″ 10.59"

8.53″ 11.25″ 10@0.81" 116 Standard

WBB GBD WBB WBB

WB GU WB WB

56864B 3600A 66864F 76864B

Standard HD HD Vortex

16.50″ 7.00″ 10.52"

8.78″ 11.25″ 10@1.08" 104

WBB WB 50876F WBB WB 58730F WBB WB 52200F WBB WB 77807BW WBB WB 56895B WBB WB 50876F WBB WB 56353F

16.50″ 7.00″ 10.75"

9.44″ 11.25″ 10@0.81" 109 Standard 9.50″ 11.25″ 10@0.81" 107 Standard 9.44″ 11.25″ 10@0.81" 109 Standard

16.50″ 7.00″ 16.50″ 7.00″

8.75" 9.50"

16.50″ 7.00″ 10.54" 16.50″ 7.00″ 10.59" 16.50″ 7.00″ 10.75"

8.78″ 11.25″ 10@1"

109 Vortex

9.00″ 11.25″ 10@0.81" 115 Standard 9.44″ 11.25″ 10@0.81" 109 Standard

16.50"7.00"11.18" 8.78"11.25"10@1"

113 Standard

ABP WBB WBB WBB

AU WB WB WB

151.6801BA 77808BW

Standard Vortex Vortex Pallet-20

16.50″ 8.00″ 11.15"

8.78″ 11.25″ 10@1"

118

77809BW 77809BW20 16.50″ 8.62″ 11.46"

8.78″ 11.25″ 10@1"

64

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