5A
O/D and 2nd Coast Brake Inspection
Reference: O/D and 2nd Coast Brake Disassembly and Assembly
• Check O/D and 2nd coast brake disc set for burn, damage, deformation or discoloration. When there is anything faulty, replace it.
• Measure free length “a” of O/D and 2nd coast brake piston return spring. When measured value is less than specified value, replace it.
O/D and 2nd coast brake piston return spring free length
“a”: 19.8 mm (0.780 in.)
• Check O/D and 2nd coast brake piston seal (1) for damage. When there is anything faulty, replace it.
Pack Clearance Check
1) Install O/D and 2nd coast brake disc set (1) (2 friction plates, 2 friction discs and separator plate (2)) to transmission case, then install snap ring.
2) Blow air into oil passage (3) as shown in figure and measure pack clearance “a”. When measured value is out of specified value range, change thickness of separator plate to obtain specified value and measure pack clearance “a” again.
Pack clearance
“a”: 0.65 – 1.05 mm (0.026 – 0.041 in.)
Available O/D and 2nd coast brake separator plate thickness
Thickness
3.0 mm (0.118 in.)
2.8 mm (0.110 in.)
2.6 mm (0.102 in.)
2.4 mm (0.094 in.)
3) After inspection, remove snap ring, separator plate, 2 friction discs and 2 friction plates from transmission case.