21
figure 2-16 figure 2-17
(3) Disassemble the fixed spring on leading brake shoe.See figure 2-18
(4) Disassemble the leading brake shoe and secondary brake shoe. Then disassemble the
regulator and regulating spring.See figure 2-19
figure 2-18 figure 2-19
(5) Disassemble the brake tube from the driven brake pump,and disassemble the assembling
bolts on the subsidiary brake pump.Then disassemble the subsidiary brake pump from brake
device motherboard.See figure 2-20
(6) Disassemble the E baffle ring to fast the brake dragline from brake device
motherboard.Then disassemble brake device motherboard bolts,and disassemble brake device
motherboard from drive axle. See figure 2-21
figure 2-20 figure 2-21
(7) Analyze subsidiary brake pump:Disassemble scraper seal. Press one terminal piston to
push out another terminal one,then push out the rest one with finger.See figure 2-22
figure 2-22
2.6.2 Brake device inspection
Inspection of parts.Repair and replacement of Damaged parts
(1) Check up if there is any rust of inner surface of sub-pump and outside of piston; then
measure the clearance between piston and pump body. Standard size: 0.03mm
—0.10mm;limit
size: 0.15mm
(2) Visually Check up if there is any damage and deformation of cup leather, please replace if
abnormal.
(3) Measure the free length of brake sub-pump, if abnormal, please replace.
(4) Measure the thickness of friction slice, if exceed the limit wear, please replace. Standard:
8.0mm;limit: 2.0mm. See figure 2-23.
(5) Eye-measure if there is any damage on inner surface of brake drum, if abnormal, amend
by lapping. If exceed amendment limit, please replace. Standard: 314mm;limit: 316mm. see figure
2-24
