Brake Master Cylinder Service
Disassembly (Fig. 10)
1
2
1.
disassembly.
Thoroughly clean outside of master cylinder before
12
3
2.
Remove reservoir and flange seal. Push in on the
push rod (item 8) so the stop pin (item 3) can be re-
moved.
3.
housing.
Disconnect lower end of the dust cover from the
4
11
4.
from cylinder housing, then remove push rod with dust
cover and clevis. Remove retainer washer.
Push in on the push rod and remove circlip (item 9)
5.
piston assembly from cylinder housing.
Remove primary piston assembly and secondary
10
9
8
7
6
5
Inspection
Figure 10
1.
2.
3.
4.
5.
6.
Reservoir
Flange seal
Stop pin
Secondary piston assy
Clevis
Jam nut
7.
8.
9.
10. Retainer washer
11. Primary piston assy
12. Cylinder housing
Dust cover
Push rod
Circlip
CAUTION
Use eye protection such as goggles when using
compressed air for master cylinder service.
1.
Clean all metal parts with isopropyl alcohol, then
clean out and dry grooves and passageways with com-
pressed air. Make sure cylinder bore and component
pieces are thoroughly clean.
2.
Checkcylinderbore,pistonsandspringsfordamage
or excessive wear. Replace brake cylinder assembly if
signs of pitting, scoring or cracks are evident in cylinder
bore.
Assembly (Fig. 10)
1.
Apply a film of clean brake fluid to cylinder bore and
piston assemblies.
2.
Install secondary piston assembly and primary pis-
ton assembly into cylinder.
3.
4.
Install retainer washer.
Install push rod and secure in place with circlip.
Install lower end of dust cover to housing.
5.
retain secondary piston assembly, then install flange
seal and reservoir.
Push in on push rod so stop pin can be installed to
Chassis
Page 7 -- 18
Workman HD Series
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