Wheel Brake Cylinder Service - Toro Workman 3000 Series Service Manual

Wheel Brake Cylinder Service

Disassembly
1. Disassemble brakes as described in Brake Service.
2. If brake line is still attached to brake cylinder, discon-
nect brake line from cylinder. Put a cap on brake line to
prevent contamination of system and brake fluid leak-
age.
3. Remove two (2) cap screws and lock washers that
secure brake cylinder to brake backing plate. Remove
brake cylinder assembly.
4. Remove dust covers, pistons, L–type seals and
spring from brake cylinder body (Fig. 7). Discard dust
covers and seals.
Inspection
CAUTION
Use eye protection such as goggles when using
compressed air.
1. Clean all metal parts with isopropyl alcohol, then
clean out and dry grooves and passageways with com-
pressed air. Make sure brake cylinder bore and compo-
nent pieces are thoroughly clean.
2. Check cylinder bore and pistons and spring for dam-
age or excessive wear. Replace brake cylinder assem-
bly if signs of pitting, scoring or cracks are evident.
Assembly
1. Apply a film of clean brake fluid to new L–type seals
and then install seals onto pistons.
2. Apply a film of clean brake fluid to cylinder bore and
piston assemblies. Carefully install one piston, the
spring and then the other piston.
3. Install new dust covers.
4. Install brake cylinder assembly to brake backing
plate with two (2) cap screws and lock washers. Torque
cap screws from 49 to 97 in–lb (5.5 to 11 N–m).
5. Connect brake line to brake cylinder.
6. Reassemble brakes (see Brake Service in this sec-
tion).
7. Bleed brakes (see Bleeding Brakes in this section).
Workman 3000/4000 Series
6
5
1
1. Dust cover (2 used)
2. Piston (2 used)
3. L–type seal (2 used)
4. Spring
Page 7 – 17
1
2
7
3
4
3
2
Figure 7
5. Bleed screw
6. Bleed screw cap
7. Brake cylinder body
Chassis