Volvo Penta AQUAMATIC 280 Workshop Manual page 57

Repair instructions
Shimming the forward and reverse
gears
Method 1
10. Measurement "A" is fixed at 62.05 mm (2.443").
11. Add or subtract the plus or minus marking (1) of
the gear.
NOTE! a + 5 marking = +0.05 mm (0.002").
54
+0.05 mm
12. Only the decimal values of the "B" and "C" di-
mensions are stamped into the upper gear housing.
The nominal value for both "B" and "C" is 61.00 mm
(2.40"). Add this value to the value stamped into the
gear to calculate shims for the forward and reverse
gears.
The shim calculations can be seen in the example be-
low:
Measurement "A": 62.05 mm
+ 0.05 mm
62.10 mm
"C" Stamping: - 61.78 mm
0.32 mm
The shim thickness for the forward gear is 0.32 mm
(0.013").
The shim thickness for the reverse gear is calculated
the same way, only using the "B" stamping.
1) Only +5 is etched.
2)
Only 88 (B) respectively 78 (C) is stamped.
(Fixed Dimension)
1)
(Gear Etching )
2)
(Stamped )
(0.013")