Volvo Penta AQUAMATIC 280 Workshop Manual page 113

Repair instructions
18. Hold the pinion nut with a 23 mm socket. Use spe-
cial tool 884830, or 3850598 as an alternative, and a
torque wrench. Torque the vertical shaft to 110 Nm
(81.5 lb.ft.).
WARNING! Be careful not to allow the
counter-hold wrench to damage the lower gear
housing. Use a piece of soft wood to brace the
wrench and protect the housing while applying
torque to the pinion nut.
Shimming the bearing box
19. The nominal dimension of the "F"-measurement is
80.00mm ±0.10 mm. Figures between 90 and 99 are
stamped into the lower gear housing indicating the
amount of variation from nominal that the housing is
machined. When the "F"-stamping is between 90 and
99, add 79.00 mm to the figure. If the "F"-stamping is
between 00 and 10, add 80.00 mm to the figure. In
this case, the "F"-stamping is 91. Add 0.91 to the
nominal figure of 79.00. The sum for the
"F"-measurement is 79.91.
110
20. Find the stamping "C" on the bearing box. In this
case, "C"=25. Again, the stamping is in decimal mil-
limeters. The nominal dimension for the bearing box
is 19.00 mm. Add the "C"-stamping to the nominal di-
mension to get the "C"-measurement.
Add:
"C"-nominal
"C"-stamping
"C"-measurement
Now subtract the "C"-measurement from the
"F"-measurement.
Subtract:
"F"-measurement
"C"-measurement
Aft gear bearing location
19.00 mm
+ 0.25 mm
19.25 mm
79.91 mm
- 19.25 mm
60.66 mm